Dieteria asteroides
in W. H. Emory, Not. Milit. Reconn., 141. 1848.
Biennials or short-lived perennials. Stems, branches, and peduncles usually hairy, puberulent, or canescent, often sparsely stipitate-glandular (glabrous or densely stipitate-glandular in var. glandulosa). Leaf blades lanceolate to oblanceolate, mid 20–100 × (2–)6–20 mm, margins entire to irregularly serrate, faces puberulent or canescent, often sparsely short-stipitate-glandular (densely, stiffly long-stipitate-glandular in var. glandulosa); distal bases cordate to auriculate, clasping. Involucres broadly turbinate to hemispheric. Phyllaries in 5–12 series, spreading to reflexed, apices acute to long-acuminate, 1–6 mm, herbaceous, faces puberulent or canescent throughout (on both indurate bases and foliaceous apices), sometimes sparsely stipitate-glandular (moderately to densely stipitate-glandular in var. glandulosa). Receptacles 3.5–7 mm diam. Ray florets pistillate, fertile; laminae white to purple, 10–20 × 0.8–1.5 mm. Disc corollas 5–8 mm. Cypselae glabrous or moderately appressed-hairy.
Distribution
sw United States, Mexico.
Discussion
Varieties 3 (3 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Stems glabrous or stipitate-glandular; leaves stiffly stipitate-glandular | Dieteria asteroides var. glandulosa |
| 1 | Stems hairy, puberulent, or canescent, sometimes sparsely stipitate-glandular; leaves puberulent or canescent, sometimes sparsely stipitate-glandular | > 2 |
| 2 | Mid leaf blades 6–20 mm wide, margins usually serrate or serrulate; involucres hemispheric; phyllary apices long-acuminate, 3–6 mm | Dieteria asteroides var. asteroides |
| 2 | Mid leaf blades 2–6 mm wide, margins entire or slightly serrulate; involucres usually broadly turbinate, rarely hemispheric; phyllary apices acute to acuminate, 1–3 mm | Dieteria asteroides var. lagunensis |