Heinrich Carl Haussknecht (November 30, 1838 - 1903) was a German pharmacist

Pharmacist

Pharmacists are allied health professionals who practice in pharmacy, the field of health sciences focusing on safe and effective medication use...

 and botanical collector who was a native of Bennungen

Bennungen

Bennungen is a village and a former municipality in the Mansfeld-Südharz district, Saxony-Anhalt, Germany. Since 1 January 2010, it is part of the municipality Südharz....

, Sachsen-Anhalt.

Trained as a pharmacist, Haussknecht is remembered for his extensive collection and description of plant species. His botanical explorations took place in Thuringia

Thuringia

The Free State of Thuringia is a state of Germany, located in the central part of the country.It has an area of and 2.29 million inhabitants, making it the sixth smallest by area and the fifth smallest by population of Germany's sixteen states....

, Lower Saxony

Lower Saxony

Lower Saxony is a German state situated in north-western Germany and is second in area and fourth in population among the sixteen states of Germany...

, the Middle East (the present-day nations of Turkey, Syria, Iraq and Iran) and Greece. He established a large herbarium

Herbarium

In botany, a herbarium – sometimes known by the Anglicized term herbar – is a collection of preserved plant specimens. These specimens may be whole plants or plant parts: these will usually be in a dried form, mounted on a sheet, but depending upon the material may also be kept in...

 in Weimar

Weimar

Weimar is a city in Germany famous for its cultural heritage. It is located in the federal state of Thuringia , north of the Thüringer Wald, east of Erfurt, and southwest of Halle and Leipzig. Its current population is approximately 65,000. The oldest record of the city dates from the year 899...

, which after his death was placed under the supervision of Joseph Friedrich Nicolaus Bornmüller

Joseph Friedrich Nicolaus Bornmüller

Joseph Friedrich Nicolaus Bornmüller was a German botanist who was born in Hildburghausen, Thuringia.He studied horticulture in Potsdam, and in 1886 travelled to the Balkans and Greece on his first botanical expedition...

 (1862-1948). In 1949 the "Herbarium Haussknecht" was transferred to the University of Jena.

Haussknecht specialized in the study of the genus Epilobium

Epilobium

Epilobium is a genus in the family Onagraceae, containing about 160-200 species of flowering plants with a worldwide distribution. They are generally abundant in the subarctic, temperate and subantarctic regions, whereas in the subtropics and tropics they are restricted to the cool montane biomes,...

from the botanical family Onagraceae

Onagraceae

Onagraceae, also known as the Willowherb family or Evening Primrose family, are a family of flowering plants. The family includes about 640-650 species of herbs, shrubs, and trees in 20-24 genera...

, and in 1884 published a monograph

Monograph

A monograph is a work of writing upon a single subject, usually by a single author.It is often a scholarly essay or learned treatise, and may be released in the manner of a book or journal article. It is by definition a single document that forms a complete text in itself...

on the genus called Monographie der Gattung Epilobium.