N.E. Hansen wearing a Siberian costume and holding a sheaf of wild Siberian flowered alfalfa

Prunus persica. Dbl. fl. Peach. Kaises VII. Plant specimen collected by N.E. Hansen, 1924. The peach (Prunus persica) is a deciduous tree native to the region of Northwest China between the Tarim Basin and the north slopes of the Kunlun Shan mountains, where it was first domesticated and cultivated. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label with hand-written notation in pencil ink.

Pinus pungens, also called Table Mountain Pine, hickory pine, prickly pine or mountain pine. This small pine is native to the Appalachian Mountains in the United States. Plant specimen collected by C.S. Sargent, 1912, first director of the Arnold Arboretum, Herbarium of Iowa College of Agriculture and Mechanic Arts, Ames, Iowa. N.E. Hansen graduated from Iowa State College with a bachelor's degree in horticulture in 1887. It is likely Hansen obtained this specimen during his time at the college. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label with hand-written notation in pencil ink.

N.E. Hansen (wearing black collared overcoat and a hat) is standing by two horses drawing an unknown type of machinery, possible a planter of some king, there are three men, one driving and two sitting on the planter, the photograph was taken while N.E. Hansen was among the Kirghiz Tartars in Semipalatinsk, Siberia

N.E. Hansen on the hardy alfalfa trail in Siberia, there are three horse-drawn wagons in a town, Hansen is riding on the first wagon

People in a courtyard by a large ornate tower made of brick with a crumbling archway, Russian words written in Cyrillic script is on the building, taken during N.E. Hansen's trip to Semipalatinsk, Russia

N.E. Hansen is seated the back of a horse drawn wagon full of wild Siberian alfalfa, there are camels behind him and several other people around him, the photographs was taken while N.E. Hansen was among the Kirghiz Tartars in Semipalatinsk, Siberia

Aceraceae Neck. Acer Mairunduense ? et Mey.. Plant specimen from the maple family collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Rosaceae B. Juss. Spirea media Schmidt. Plant specimen collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink.

Rosaceae B. Juss. Pyrus ussuriensis Max +P. Sinensis Lindl. Plant specimen collected by N.E. Hansen, 1924, also known as the Ussurian pear, Harbin pear, and Manchurian pear, is a species of flowering plant in the family Rosaceae. It is native to Korea, Japan, and the Ussuri River area of far eastern Russia. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink.

Mausoleum of General Ma Zhanshan in Harbin, China; written in pencil on the back: Mausoleum built by General Ma for himself and two wives, Harbin, China, 1924

Ornamental plantings in a garden in Harbin, China; written in pencil on the back: Garden at Harbin 1924

Tree surrounded by a small lattice fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Garden feature by a small lattice fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Child running by the ornamental plantings surrounded by a fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Ornamental plantings surrounded by a fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Men walking over the rails at the Trans-Siberian Railway east of Harbin, China; written in pencil on the back: Siberian Railway east of Harbin, 1924

N.E. Hansen and another man are standing in a Kaoliang sorghum field at Echo in Manchuria, China; written in pencil on the back: Kaoliang at Echo, Manchuria 1924

Rickshaw on the street by an ornate storefront in Fushun, Manchuria in northern China; written in pencil on the back: Futachien Manchuria Chinese Store - 1924

Large baskets of fruit for sale at a bazaar in Fushun, Manchuria in northern China; written in pencil on the back: Fruit bazaar at Futachien 1924

Man selling fruit at a bazaar in Fushun, Manchuria in northern China; written in pencil on the back: Futachien 1924

Fruit sellers at a bazaar in Fushun, Manchuria in northern China; written in pencil on the back: Futachien 1924

People buying and selling fruits and vegetables at a bazaar in Fushun, Manchuria in northern China; written in pencil on the back: Futachien 1924

People looking at fruits and vegetables for sale at a bazaar in Fushun, Manchuria in northern China; written in pencil on the back: Futachien 1924

Ornate sign hanging over store in Manzhouli, Manchuria in northern China; written in pencil on the back: Manchouli North China 1924

N.E. Hansen and his three assistants gathering specimens in a field with a horse-drawn wagon at Mendoche before they begin a search for hardy peach trees in northern China, there is a dog in the grass; written in pencil on the back: Mendoche 1924 North China

N.E. Hansen and his three assistants gathering specimens in a field with a horse-drawn wagon at Mendoche before they begin a search for hardy peach trees in northern China, there is a dog in the grass; written in pencil on the back: Mendoche 1924 North China

Terrain in Mendoche, northern China that N.E. Hansen traveled in is search for hardy peach trees in 1924; written in pencil on the back: Mendoche, North China 1924

Terrain in Mendoche, northern China that N.E. Hansen traveled in is search for hardy peach trees in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants are gathering specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants climb rough terrain to gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants rest in the grass on their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

People gathered at a bazaar on the Trans-Siberian Railway enroute to Saolin in northern China; written in pencil on the back: On Siberian Railway enroute to Saolin 1924 North China

Dead trees on the Trans-Siberian Railway enroute to Saolin in northern China; written in pencil on the back: On Siberian Railway enroute to Saolin 1924 North China

Transmission lines on the Trans-Siberian Railway enroute to Saolin in northern China; written in pencil on the back: On Siberian Railway enroute to Saolin 1924 North China

Mountain scenery on the Trans-Siberian Railway at Saolin in northern where N.E. Hansen was conducting research on pears

N.E. Hansen's headquarters while conducting pear research at Saolin in northern China; written in pencil on the back: Saolin, China my headquarters for pears in the mountains 1924

N.E. Hansen's mountain headquarters is nestled in the trees while conducting pear research at Saolin in northern China; written in pencil on the back: Saolin, China my headquarters fro pears in the mountains 1924

Assistants to N.E. Hansen gather specimens of pears in Saolin in northern China; written in pencil on the back: Saolin 1924 North China pear research

N.E. Hansen and another man are sitting in rickshaws while Hansen was on the hunt for pears in northern China, there are several children surrounding them; written in pencil on the back: 1924 Hunting for Pears Niels Hansen north China

Valley of the Da Hinggan mountain range in northern China where the Trans-Siberian Railway runs, there are buildings in the foreground; written in pencil on the back: In Hinggan North China in mountains 1924

N.E. Hansen is standing behind a man with a carrying pole on his shoulders and two baskets full of pears at Hansen's headquarters while conducting pear research at Saolin in northern China, there are two men accompanying them; written in pencil on the back: North China 1924

Mountain scenery by the Trans-Siberian Railway in northern China; written in pencil on the back: North China 1924

Family waiting to board a Trans-Siberian Railway rail car in northern China in 1924; written in pencil on the back: On Siberian Railway through North China 1924

Ship on the Inland Sea in Japan; written in pencil on the back: Ships on Inland Sea, Japan 1924

Field and village nestled in the mountains by the Inland Sea in Japan, a fence can be seen in the foreground; written in pencil on the back: along Inland Sea, Japan 1924

Ship in Tokyo Bay at Yokahama, Japan; written in pencil on the back: Yokohama 1924

Ships in Tokyo Bay at Yokahama, Japan; written in pencil on the back: Yokohama 1924

Steamer ship by the dock at the port in Tokyo Bay at Yokahama, Japan, there are people waiting to board the ship on the dock, a small boat is in the water in the foreground, the ship is possibly a steamer ship called the Admiral from a line of ships owned and operated by the United States government; written in pencil on the back: Yokohama 1924

Aceraceae Neck. Acer Tomentosum Max. Plant specimen from the maple family collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Rosaceae B. Juss. Spirea Chamaedrifolia L. Common name germander meadowsweet or elm-leaved spirea. Plant specimen collected by N.E. Hansen, 1924. Spiraea chamaedryfolia is a shrub reaching a height of 1–1.5 meters (3 feet 3 inches–4 feet 11 inches). Branchlets are brownish or red-brown. Leaves are simple, oblong or lance-shaped, toothed on the edges, 40–60 millimeters (1.6–2.4 inches) long and 10–30 millimeters (0.39–1.18 inches) wide, with a petiole of 4–7 millimeters. The white flowers of 6–9 millimeters in diameter grow in spike-like clusters at the ends of the branches. Flowering period extends from May to September. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Rosaceae B. Juss. Micromeles alnifolia Koehne. Plant specimen collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink.

Saxofragaceae Dumort. Ribes manshuricum (Max.) Kom. Plant specimen collected by N.E. Hansen, 1924. Saxifragaceae are found mostly in the Northern Hemisphere, with centers of diversity in the Himalayas, East Asia, and Western North America. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

View of the Mausoleum of General Ma Zhanshan in Harbin, China; written in pencil on the back: Mausoleum built by General Ma for himself and two wives, Harbin, China, 1924

Man in General Ma Zhanshan Gardens in Harbin, China; written in pencil on the back: In General Ma's Garden, Harbin, China, 1924

Ornamental plantings in a park in Harbin, China; written in pencil on the back: Garden at Harbin 1924

N.E. Hansen looking at bags of soybeans at a bazaar in Fushun, Manchuria in northern China, there are men sitting by a building in the background; written in pencil on the back: Soybeans at Futachien 1924

Horse-drawn rickshaw carriage on the street by an ornate storefront in Fushun, Manchuria in northern China; written in pencil on the back: Futachien Manchuria Chinese Store - 1924

Busy street in Fushun, Manchuria in northern China; written in pencil on the back: Futachien 1924

N.E. Hansen looking at onions and other vegetables for sale at a bazaar in Fushun, Manchuria in northern China; written in pencil on the back: Onions, etc. at Futachien 1924

Man sitting on a table at a bazaar in Fushun, Manchuria in northern China; written in pencil on the back: Futachien 1924

N.E. Hansen with a man wearing white in Fushun, Manchuria in northern China; written in pencil on the back: Futachien 1924

Ornate designs on a building in Manzhouli, Manchuria in northern China; written in pencil on the back: Manchouli North China 1924

N.E. Hansen and his three assistants stand by a horse-drawn wagon by a building at Mendoche before they begin a search for hardy peach trees in northern China; written in pencil on the back: Mendoche 1924 North China

N.E. Hansen and his three assistants stand by a horse-drawn wagon by a building at Mendoche before they begin a search for hardy peach trees in northern China; written in pencil on the back: Mendoche 1924 North China

Three assistants to N.E. Hansen are gathering specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants climb rough terrain to gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

Man walking down the stairs at the railway station in Saolin in northern China, a young girl is standing at the foot of the stairs; written in pencil on the back: Railway station Saolin North China 1924

Man hauling dirt in baskets attached to a carrying pole on his shoulders, the dirt is being loaded on to a Trans-Siberian Railway train car near Saolin in northern China; written in pencil on the back: Saolin 1924 North China pear research

N.E. Hansen's mountain headquarters is nestled in the trees while conducting pear research at Saolin in northern China; written in pencil on the back: Saolin, China my headquarters fro pears in the mountains 1924

N.E. Hansen and a companion on a horse-drawn wagon ready to start the Da Hinggan mountain range in northern China; written in pencil on the back: Starting over the mountains to Hinggan 1924 North China

Man with a carrying pole on his shoulders and two baskets full of pears at N.E. Hansen's headquarters while conducting pear research at Saolin in northern China; written in pencil on the back: North China 1924

Man with a carrying pole on his shoulders is with another man and a young child in front of N.E. Hansen's headquarters while conducting pear research at Saolin in northern China; written in pencil on the back: North China 1924

People walking on a street toward a temple in Seoul, Korea in 1924; written in pencil on the back: Seoul, Korea 1924

Field and village nestled in the mountains by the Inland Sea in Japan; written in pencil on the back: along Inland Sea, Japan 1924

Passengers waiting to board a steamer ship by the dock at the port in Tokyo Bay at Yokahama, Japan, the ship is possibly a steamer ship called the Admiral from a line of ships owned and operated by the United States government; written in pencil on the back: Yokohama 1924

Rosaceae B. Juss. Spirea Chamaedrifolia L. Common name germander meadowsweet or elm-leaved spirea. Plant specimen collected by N.E. Hansen, 1924. Spiraea chamaedryfolia is a shrub reaching a height of 1–1.5 meters (3 feet 3 inches–4 feet 11 inches). Branchlets are brownish or red-brown. Leaves are simple, oblong or lance-shaped, toothed on the edges, 40–60 millimeters (1.6-2.4 inches) long and 10-30 millimeters (0.39-1.18 inches) wide, with a petiole of 4-7 millimeters. The white flowers of 6-9 millimeters in diameter grow in spike-like clusters at the ends of the branches. Flowering period extends from May to September. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Saxifragaceae Dumort. Deutzia parviflora Bunge. Plant specimen collected by N.E. Hansen, 1924. Saxifragaceae are found mostly in the Northern Hemisphere, with centers of diversity in the Himalayas, East Asia, and Western North America. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink.

People on the Trans-Siberian Railway platform by the train in Harbin, China; written in pencil on the back: Hailar 1924

Monument in General Ma Zhanshan Gardens in Harbin, China; written in pencil on the back: Monument General Ma's Garden on the outskirts of Harbin, China, 1924

Ornamental plantings surrounded by a fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Man smiles for the camera while N.E. Hansen is looking the fruit he has for sale at a bazaar in Harbin, China; written in pencil on the back: Harbin 1924

Men selling wild grapes by the Trans-Siberian Railway east of Harbin, China; written in pencil on the back: Selling wild grapes on railway east of Harbin, 1924

N.E. Hansen with two others standing in a Kaoliang sorghum field at Echo in Manchuria, China; written in pencil on the back: Kaoliang at Echo, Manchuria 1924

Many people in a bazaar in Fushun, Manchuria in northern China, there is fruit in the foreground; written in pencil on the back: Futachien 1924

Signs hanging over stores in Manzhouli, Manchuria in northern China as viewed from behind a horse; written in pencil on the back: Signs over North Chinese store - Manchouli 1924

Men working on a Trans-Siberian Railway train car enroute to Manzhouli, Manchuria in northern China; written in pencil on the back: Siberian Railway enroute to Manchouli 1924

Signs hanging over stores in Manzhouli, Manchuria in northern China; written in pencil on the back: Manchouli North China 1924

N.E. Hansen and two assistants are gathering specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen's assistants gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924, one man is holding a gun; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and native Manchu mountain farmer in Myfun in northern China in 1924, note the noodles and squash drying in the background; written in pencil on the back: Myfun, North China N.E. Hansen and native Manchu mountain farmer note macaroni hung up in rear and dried squash

Pear tree in the mountains was photographed as an example during N.E. Hansen's research on pears at Saolin in northern China; written in pencil on the back: Saolin, China my headquarters fro pears in the mountains 1924

Soybeans are temporarily stored in covered bins awaiting shipment at Anda in northern China; written in pencil on the back: Soybeans stored ready for shipment at Anda, North China 1924

Soybeans are temporarily stored in covered bins awaiting shipment at Anda in northern China; written in pencil on the back: Soybeans stored ready for shipment at Anda, North China 1924

Fruit peddlers at Anda in northern China, a man is walking across the tracks of the Trans-Siberian Railway, there are soybeans temporarily stored in covered bins awaiting shipment in the background; written in pencil on the back: Soybeans stored ready for shipment at Anda, North China 1924

View of a river in a valley of the Da Hinggan mountain range in northern China; written in pencil on the back: In Hinggan North China mountains 1924

Man standing on a stone walkway by a small fence by a plot of plant near the Trans-Siberian Railway in northern China; written in pencil on the back: On Siberian Railway 1924

People standing on the platform by Trans-Siberian Railway in northern China; written in pencil on the back: On Siberian Railway 1924

People walking on a street toward a temple in Seoul, Korea in 1924; written in pencil on the back: Seoul, Korea 1924

View of ships at port in Tokyo Bay at Yokahama, Japan from the shore; written in pencil on the back: Yokohama 1924