Petradoria pumila subsp. graminea (Woot. & Standl.) L.C. Anders.
Family: Asteraceae
giant rockgoldenrod
[Petradoria pumila var. graminea (Woot. & Standl.) Welsh,  more...]
Petradoria pumila subsp. graminea image

Stems 10-25 cm. Leaf blades usually 1(-3)-nerved, linear to narrowly lanceolate, 30-90 × 1-2 mm. Heads 10-25. Involucres 5-8 × 1.3-2 mm. Phyllaries 11-15. Ray florets usually 1; corollas 5-7.5 mm, laminae 0.7-1.5 mm wide. Disc florets 2-3; corollas 4-5.8 mm, lobes 0.5-1 mm. 2n = 18.

Flowering mid summer-fall. Dry, open, rocky habitats; 1500-2500 m; Ariz., N.Mex., Utah.