''Haesselia'' is a genus of

liverworts The Marchantiophyta () are a division of non-vascular land plants commonly referred to as hepatics or liverworts. Like mosses and hornworts, they have a gametophyte-dominant life cycle, in which cells of the plant carry only a single set of ge ...

in the family

Cephaloziaceae Cephaloziaceae is a family of liverworts. Liverworts of this family are dioecious plants which have creeping or upright forms. They are green, brown, reddish, or purplish in color. The leaves are alternately arranged and succubous. Oil bodies a ...

. It contains the following species (but this list may be incomplete): * ''

Haesselia roraimensis ''Haesselia roraimensis'' is a species of liverwort in the family Cephaloziaceae. It is endemic to Guyana. Its natural habitat is on rotten logs in periodically flooded riverine forest from 550 and to 1,550 meters elevation, in the humid submont ...

'' Grolle & Gradst. The genus name of ''Haesselia'' is in honour of Gabriela Gustava Hässel de Menéndez (1927-2009), who was an Argentinian botanist (Bryology), who also was a

Geologist A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other terrestrial planets, as well as the processes that shape them. Geologists usually study geology, earth science, or geophysics, althou ...

. The genus was

circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. Not every polyg ...

by Riclef Grolle and Stephan Robbert Gradstein in J. Hattori Bot. Lab. vol.64 on page 327 in 1988.

References

Cephaloziaceae Jungermanniales genera Taxonomy articles created by Polbot {{bryophyte-stub