''Fleischmannia'' is a genus of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

in the family

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. The name honours Gottfried F. Fleischmann (1777–1850), the teacher of Carl Heinrich Schultz at

University of Erlangen–Nuremberg University of Erlangen–Nuremberg (german: Friedrich-Alexander-Universität Erlangen-Nürnberg, FAU) is a Public University, public research university in the cities of Erlangen and Nuremberg in Bavaria, Germany. The name Friedrich–Alexander ...

. Members of the genus are native to

South South is one of the cardinal directions or Points of the compass, compass points. The direction is the opposite of north and is perpendicular to both east and west. Etymology The word ''south'' comes from Old English ''sūþ'', from earlier Pro ...

Central Central is an adjective usually referring to being in the center of some place or (mathematical) object. Central may also refer to: Directions and generalised locations * Central Africa, a region in the centre of Africa continent, also known as ...

, and

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

, with some species found as far north as

Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...

and

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolita ...

. They are commonly known as thoroughworts. ''Fleischmannia'' is in the tribe

Eupatorieae Eupatorieae is a tribe of over 2000D.J.N.Hind & H.E.Robinson. 2007. Tribe Eupatorieae In: ''The Families and Genera of Vascular Plants'' vol.VIII. (Joachim W.Kadereit & Charles Jeffrey, volume editors. Klaus Kubitzky, general editor). Springer-Ve ...

and as such has flower heads with

disc floret The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

s and no ray florets. Within that tribe it is most closely related to ''

Conoclinium ''Conoclinium'', the mistflowers, is a genus of four species of herbaceous perennial flowering plants, native to North America. They are tall, and have blue to purple or violet flowers (occasionally white). The plants of this genus have sometim ...

'' and ''

Ageratum ''Ageratum'' () (whiteweed in the USA) is a genus of 40 to 60 tropical and warm temperate flowering annuals and perennials from the family Asteraceae, tribe Eupatorieae. Most species are native to Central America and Mexico but four are native ...

''. ''Fleischmannia'' species were traditionally included as part of the large ''

Eupatorium ''Eupatorium'' is a genus of flowering plants in the family Asteraceae, containing from 36 to 60 species depending on the classification system. Most are herbaceous perennials growing to tall. A few are shrubs. The genus is native to temperate ...

'', recognized in the broad sense based on achenes with five ribs and a pappus of capillary bristles. ''Fleischmannia'' is distinguished morphologically by having the inner surface of the corolla lobes markedly

papillate This glossary of botanical terms is a list of definitions of terms and concepts relevant to botany and plants in general. Terms of plant morphology are included here as well as at the more specific Glossary of plant morphology and Glossary o ...

(requires magnification to see), the carpopodia symmetrical and stopper-shaped, and the involucres small and with 3 series of subimbricate bracts. The number of flowers per head is typically 20 or more (up to 50). Many species are herbs and somewhat weedy, and have leaves with long petioles. Although the base chromosome number for the genus is ''x''=10, one species, ''F. microstemon'', is notable for have a chromosome number of ''x''=4, the lowest in tribe Eupatorieae. A thorough study of ''Fleischmannia'' is needed to determine if all of its species are actually distinct and worthy of recognition. ; Species

References

* * {{Taxonbar, from=Q2835825 Asteraceae genera Taxonomy articles created by Polbot