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.

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.

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

N.E. Hansen standing by a fruit tree on the campus of South Dakota State College that was part of Hansen's research on fruit

N.E. Hansen at Ivan V. Michurin's orchard near Chelyabinsk, Russia, Hansen's son, Carl Hansen, is behind him eating fruit

N.E. Hansen and his son, Carl Hansen, with three men at an orchard near Chelyabinsk, Russia; written in pencil on the back: one of the orchard places Russia 1934

Lillian Gibson roses, developed by N.E. Hansen, were named for Mrs. Charles W. Pugsley at the request of her husband, Charles W. Pugsley, who was president of South Dakota State College from 1923-1940

Rare portrait of Dr. N.E. Hansen without a beard, he is wearing an overcoat and a hat and seated in a chair

N.E. Hansen Memorial Garden located at McCrory Gardens on the campus of South Dakota State University in Brookings, South Dakota

Crowds of people gathered on the campus of South Dakota State College to attend the recognition service for Dr. N.E. Hansen

People gathered between the Horticulture Building and the Administration Building for the recognition service for Dr. N.E. Hansen on the campus of South Dakota State College

Crowds of people gathered for a reception for the recognition service for Dr. N.E. Hansen n the campus of South Dakota State College

Crowds of people gathered for a reception for the recognition service for Dr. N.E. Hansen n the campus of South Dakota State College

Unveiling of the rock and bronze tablet commemorating Dr. N.E. Hansen's work, it was located in between the Administration Building and the Horticulture Building; left to right: unknown man, Frank Cundill, South Dakota State College President Leinbach; Governor Mickelson; Dr. Hansen; Carl Hansen; Harry Dory; and Lucille Dory

South Dakota Governor Mickelson congratulates Dr. N.E. Hansen on his long-time term of service at South Dakota State College and his distinguished work as a plant breeder as he addresses a crowd of 250 relatives, friends, and associates during the ceremonies commemorating the achievements of Dr. Hansen in the field of horticulture, this occurred in front of Lincoln Memorial Library

People gathered in front of Lincoln Memorial Library listening to speakers during the recognition service for Dr. N.E. Hansen on the campus of South Dakota State College

Dr. N.E. Hansen and an unknown man are in a greenhouse full of flowers on the campus of South Dakota State College

Dr. N.E. Hansen and an unknown man are in a greenhouse full of flowers on the campus of South Dakota State College

Research notebook for N.E. Hansen's experiments with alfalfa for 1911, with notes regarding 1909 and 1910 experiments. Varieties studied include Omsk, Cossack, Samara, North Sweden, Obb Siberia, and Cherno.

N.E Hansen's research notebook regarding field experiments for grasses and grains in 1888 and 1889. The field consisted of 66 plots. He studied 92 varieties in total including: 22 grasses, 9 clovers, 20 wheats, 23 oats, 14 barleys, 1 rye. Hansen was assisted by John M. Aldrich, Alvah George Cross, and J.G. Ross.