Show Lower Taxa
Difference between revisions of "Xylorhiza tortifolia"
Pittonia 3: 48. 1896.
IllustratedEndemic
Basionym: Haplopappus tortifolius Torrey & A. Gray Boston J. Nat. Hist. 5: 109. 1845 (as Aplopappus)
Synonyms: Machaeranthera tortifolia (Torrey & A. Gray) Cronquist & D. D. Keck
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Revision as of 20:06, 5 November 2020
Subshrubs, 20–60(–80) cm. Stems branched mostly in proximal 3/4, ± piloso-villous, stipitate-glandular. Leaf blades lanceolate to elliptic-oblong or oblanceolate, 3–20(–25) mm wide, bases often subclasping or sometimes attenuate and not clasping, margins flat, sharply spinulose-toothed, faces loosely villous or glabrous, stipitate-glandular. Peduncles 5–25 cm. Involucres 12–20 × 15–20(–30) mm. Ray florets (15–)18–60(–85); corollas usually lavender, seldom white. Style-branch appendages shorter than stigmatic lines.
Distribution
Ariz., Calif., Nev., Utah
Discussion
Varieties 2 (2 in the flora).
Selected References
None.
Key
| 1 | Stems, leaves, and involucres glabrous, stipitate-glandular; leaf margins sparsely piloso-villous to puberulent | Xylorhiza tortifolia var. imberbis |
| 1 | Stems, leaves, and involucres piloso-villous to puberulent, finely stipitate-glandular | Xylorhiza tortifolia var. tortifolia |