Astranthium Nuttall. Western-daisy.
A genus of about 11 species, herbs, of sc. North America and Mexico.
ID notes: The lamina (plural: laminae) is the strap-shaped abaxial lip of the (typically 3-lobed) ray floret corollas. It is homologous with the abaxial lip of a bilabiate or pseudobilabiate corolla, in which it is typically oriented away from the center of the head.
Ref: Cronquist (1980); DeJong (1965); Nesom (2000b); Nesom (2006x) In Flora of North America Editorial Committee (2006b); Nesom (2015e). Show full citations.
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© Richard & Teresa Ware | Astranthium integrifolium CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Bruce A. Sorrie | 
© Alan Cressler: astranthium integrifolium ssp. integrifolium, limestone glade, chickamauga and chattanooga national military park, catoosa county, georgia 1 by Alan Cressler | Astranthium integrifolium source | Original Image ⭷
© Richard & Teresa Ware | Astranthium integrifolium CC-BY-NC, permission granted to NCBG | Original Image ⭷