Pericome Macrocephala
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''Pericome'' is a small
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of flowering plants in the
daisy family 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 ...
. There are two species. '' Pericome caudata'' is native to the southwestern United States and northern Mexico, where it is relatively common. The second species, '' Pericome macrocephala'', is known only from
Durango Durango (), officially named Estado Libre y Soberano de Durango ( en, Free and Sovereign State of Durango; Tepehuán: ''Korian''; Nahuatl: ''Tepēhuahcān''), is one of the 31 states which make up the 32 Federal Entities of Mexico, situated in ...
in
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
at its type locality.Powell, A. M. (1973). Taxonomy of ''Pericome'' (Compositae: Peritylinae). ''The Southwestern Naturalist'' 18:3 335-9. These are branching perennial herbs or small
shrub A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...
s often exceeding one meter tall. They bear clusters of
flower heads A pseudanthium (Greek for "false flower"; ) is an inflorescence that resembles a flower. The word is sometimes used for other structures that are neither a true flower nor a true inflorescence. Examples of pseudanthia include flower heads, compos ...
with golden disc florets.


References


External links


Jepson Manual TreatmentFlora of North America: ''Pericome''
Asteraceae genera Perityleae {{Asteroideae-stub