Dyscritothamnus

Dyscritothamnus
Dyscritothamnus filifolius, flowering head and leaves
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Subfamily:	Asteroideae
Tribe:	Millerieae
Subtribe:	Dyscritothamninae Panero
Genus:	Dyscritothamnus B.L.Rob.
Type species
Dyscritothamnus filifolius B.L.Rob.

Dyscritothamnus is a genus of Mexican flowering plants in the daisy family. ^{[1] [2] [3]}

Description

The genus Dyscritothamnus, comprising only two species, is distinguished by this combination of features: ^[4]

• They are woody shrubs with leaves appearing singly at each point along the stems, not opposite one another.
• Flowering heads consist of reduced flowers (florets) with orange corollas
• Two series of bracts of conspicuously different lengths form a cylindrical structure, the involucre, from which the florets arise in two series.
• Atop the one-seeded, cypsela-type fruits the pappuses consist of numerous bristles with tiny projections along their sides, like barbs along a very slender feather's rachis.

List of species

As of 2025, these species are recognized: ^[5]

• Dyscritothamnus filifolius B.L.Rob. - Guanajuato, Hidalgo
• Dyscritothamnus mirandae Paray - Querétaro

References

1. Robinson, Benjamin Lincoln. 1922. Contributions from the Gray Herbarium of Harvard University 65: 25-28 descriptions in Latin, commentary in English
2. Robinson, Benjamin Lincoln. 1922. Contributions from the Gray Herbarium of Harvard University 65: plate 1 drawing of Dyscritothamnus filifolius
3. Tropicos, Dyscritothamnus B.L. Rob.
4. Rzedowski, Jerzy; Calderón de Rzedowski, Graciela (September 2008). "Flora del B" (PDF). Flora del Bajío y de Regiones Adyacentes (in Spanish). 157. Pátzcuaro, Michoacán, México: Instituto de Ecología, A.C. (INECOL): 221–225. Retrieved December 9, 2025.
5. "Dyscritothamnus (genus in Asteraceae)". catalogueoflife.org. Catalogue of Life. November 16, 2025. Retrieved December 9, 2025.