Stephanomeria paniculata |
Stephanomeria exigua |
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stiff-branch stephanomeria, stiff-branch wirelettuce, tuft wirelettuce |
skeletonplant, small wirelettuce |
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Habit | Annuals, 0–100 cm. | Annuals, 10–200 cm (taproots relatively large). | ||||||||||||||||
Stems | single, branched (branches nearly at right angles, stiff), glabrous. |
single, branches divaricately or freely spreading, glabrous or sparsely pubescent. |
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Leaves | withered at flowering; basal blades oblanceolate, 6–10 cm, margins entire or toothed (teeth minute, faces glabrous); cauline much reduced, bractlike. |
withered at flowering; basal blades linear to oblanceolate, runcinate, 3–10 cm, margins pinnately lobed; cauline much reduced, bractlike. |
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Peduncles | 2–10 mm. |
2–10 mm (along branches), or 10–40 mm (in paniculiform arrays). |
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Involucres | 6–9 mm. |
5–7 mm (glabrous, puberulent, or densely stipitate-glandular). |
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Florets | 5. |
5–11. |
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Calyculi | of appressed bractlets. |
of appressed or reflexed bractlets (glabrous, pubescent, or stipitate-glandular). |
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Heads | borne singly along branches or in paniculiform arrays. |
borne singly or clustered along branches or in paniculiform arrays. |
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Cypselae | light to dark tan, 3.8–4.2 mm, faces slightly bumpy to tuberculate, (grooved); pappi of 15–18 tan bristles (connate in groups of 2–4, bases persistent), plumose to tops of bases. |
light tan to dark brown, 2.1–6.8 mm, faces smooth to tuberculate, grooved; pappi of 5–24 tan or white bristles (falling or widened bases persistent, bases connate in groups of 2–4 distal portions breaking off), plumose on distal 50–85%. |
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2n | = 16. |
= 16. |
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Stephanomeria paniculata |
Stephanomeria exigua |
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Phenology | Flowering Jun–Sep. | |||||||||||||||||
Habitat | Open, sandy or volcanic soils, plains and foothills, often growing as weed along roads | |||||||||||||||||
Elevation | 200–1400 m (700–4600 ft) | |||||||||||||||||
Distribution |
CA; ID; OR; WA
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AZ; CA; CO; ID; NM; NV; OR; TX; UT; WA; nw Mexico
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Discussion | Subspecies 5 (5 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 19, p. 356. | FNA vol. 19, p. 353. | ||||||||||||||||
Parent taxa | Asteraceae > tribe Cichorieae > Stephanomeria | Asteraceae > tribe Cichorieae > Stephanomeria | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 428. (1841) | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 428. (1841) | ||||||||||||||||
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