Townsendia scapigera |
Townsendia texensis |
|
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ground townsendia, tuft Townsend daisy, tuft townsendia |
Texas Townsend daisy |
|
Habit | Biennials (sometimes persisting), 15–25+ cm. | |
Stems | ± erect; internodes 0.1–1 mm, ± strigose. |
decumbent to erect; internodes 5–20+ mm, strigose. |
Leaves | basal and cauline, blades ± spatulate to oblanceolate, 15–30(–70) × 2–5(–9) mm, not fleshy, faces ± strigose. |
basal and cauline, blades oblanceolate to lance-linear, 20–45(–60+) × 2–4(–6+) mm, not fleshy, faces ± strigose. |
Involucres | ± campanulate, 12–20(–32) mm diam. |
± campanulate to hemispheric, 12–15(–20+) mm diam. |
Ray florets | 18–35; corollas white adaxially, laminae 7–16 mm, glandular-puberulent abaxially. |
25–40+; corollas white or purplish adaxially, laminae 9–18 mm, abaxially usually glabrous, sometimes glandular-puberulent. |
Disc florets | 40–100+; corollas 3.5–5.5 mm. |
80–120+; corollas 3.5–5 mm. |
Phyllaries | 16–32+ in 3–4+ series, the longer ± lanceolate, (7–)9–13 mm (l/w = 3–5), apices acute, abaxial faces piloso-strigose to strigose. |
40–44 in 4–5+ series, the longer ± lanceolate, 5–9+ mm (l/w = 2.5–5), apices acute to attenuate (soft, not apiculate), abaxial faces strigose. |
Heads | on scapiform peduncles 30–60(–120) mm. |
at tips of stems (usually surpassed by leaves). |
Cypselae | 4–5.5 mm, faces hairy, hair tips forked or entire; pappi persistent; on ray cypselae 20–30+ subulate to setiform scales 3–6+ mm; on disc cypselae 20–30 subulate to setiform scales 5–7+ mm. |
3.5–4 mm, faces hairy, hair tips glochidiform; pappi persistent; on ray cypselae ± 20 lanceolate to subulate scales 0.5–0.8(–2+) mm; on disc cypselae 16–24 subulate to setiform scales 5 mm. |
2n | = 18. |
|
Townsendia scapigera |
Townsendia texensis |
|
Phenology | Flowering May–Jul(–Aug). | Flowering May–Jun. |
Habitat | Openings in sagebrush | Cherts, limestone slopes |
Elevation | 1400–3400 m (4600–11200 ft) | 1200 m (3900 ft) |
Distribution |
CA; ID; NV; OR; UT
|
OK; TX |
Discussion | Plants that key here and have peduncles 5–15+ mm (sporting smaller heads, fewer ray florets, and smaller cypselae than are characteristic of Townsendia scapigera) may belong to T. jonesii (which see). Plants included here in T. scapigera from Sweetwater Mountains, California, with relatively large heads and high numbers of florets were identified on their labels (e.g., DeDecker 3928, RSA) as T. parryi, a species not known to occur in California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 20, p. 201. | FNA vol. 20, p. 196. |
Parent taxa | ||
Sibling taxa | ||
Name authority | D. C. Eaton: in S. Watson, Botany (Fortieth Parallel), 145, plate 17, figs. 1–7. (1871) | Larsen: Ann. Missouri Bot. Gard. 14: 15, plate 3. (1927) |
Web links |