Townsendia jonesii |
Townsendia texensis |
|
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Jones' Townsend daisy, Jones' townsendia |
Texas Townsend daisy |
|
Habit | Perennials, 1–2(–4) cm (usually ± pulvinate). | Biennials (sometimes persisting), 15–25+ cm. |
Stems | ± erect; internodes 0.1–1 mm, ± scabrellous to strigose. |
decumbent to erect; internodes 5–20+ mm, strigose. |
Leaves | basal and cauline, blades ± spatulate to oblanceolate, 7–15(–35+) × 1–2(–4+) mm, not fleshy, faces ± scabrellous to strigose. |
basal and cauline, blades oblanceolate to lance-linear, 20–45(–60+) × 2–4(–6+) mm, not fleshy, faces ± strigose. |
Involucres | ± campanulate, 8–14 mm diam. |
± campanulate to hemispheric, 12–15(–20+) mm diam. |
Ray florets | 13–21; corollas white adaxially, laminae 5–7+ mm, ± densely glandular-puberulent abaxially. |
25–40+; corollas white or purplish adaxially, laminae 9–18 mm, abaxially usually glabrous, sometimes glandular-puberulent. |
Disc florets | 40–80+; corollas 4.5–5+ mm. |
80–120+; corollas 3.5–5 mm. |
Phyllaries | 20–28 in 3–4+ series, the longer ± lanceolate, 4–8 mm (l/w = 2.5–5), sometimes glabrate, apices acute, abaxial faces usually sparsely strigillose. |
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 | usually ± sessile, sometimes on scapiform peduncles 5–15+ mm. |
at tips of stems (usually surpassed by leaves). |
Cypselae | 2–3(–4+) mm, faces hairy, hair tips glochidiform or forked; pappi persistent; on ray cypselae 20–24 subulate to setiform scales 3–4+ mm; on disc cypselae 20–24 subulate to setiform scales 4–6(–8) 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 jonesii |
Townsendia texensis |
|
Phenology | Flowering Apr–Jun. | Flowering May–Jun. |
Habitat | Rocky slopes, limestone slopes with pinyons | Cherts, limestone slopes |
Elevation | 2100–3000 m (6900–9800 ft) | 1200 m (3900 ft) |
Distribution |
AZ; NV; UT
|
OK; TX |
Discussion | The current circumscription of Townsendia jonesii is, perhaps, too lumpy. Some lumps might be better treated as distinct species and/or included within the circum-scription of T. scapigera. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 20, p. 202. | FNA vol. 20, p. 196. |
Parent taxa | Asteraceae > tribe Astereae > Townsendia | Asteraceae > tribe Astereae > Townsendia |
Sibling taxa | ||
Synonyms | T. mensana var. jonesii | |
Name authority | (Beaman) Reveal: Great Basin Naturalist 30: 35. (1970) | Larsen: Ann. Missouri Bot. Gard. 14: 15, plate 3. (1927) |
Web links |