Townsendia texensis |
Townsendia gypsophila |
|
---|---|---|
Texas Townsend daisy |
gypsum-lovingtownsend daisy |
|
Habit | Biennials (sometimes persisting), 15–25+ cm. | Perennials, 2–10 cm (± pulvinate to dendroid). |
Stems | decumbent to erect; internodes 5–20+ mm, strigose. |
± erect; inter- nodes 0.1–1+ mm, densely piloso-hirsute to hispidulous (surfaces usually hidden by hairs). |
Leaves | basal and cauline, blades oblanceolate to lance-linear, 20–45(–60+) × 2–4(–6+) mm, not fleshy, faces ± strigose. |
basal and cauline, blades ± spatulate or oblanceolate to linear, 4–9(–25) × 1–2(–3) mm, ± fleshy, ± strigose. |
Involucres | ± campanulate to hemispheric, 12–15(–20+) mm diam. |
± hemispheric to campanulate, 3–6 mm diam. |
Ray florets | 25–40+; corollas white or purplish adaxially, laminae 9–18 mm, abaxially usually glabrous, sometimes glandular-puberulent. |
(4–)12–16; corollas white or pinkish adaxially, laminae 3–5+ mm, glabrous abaxially. |
Disc florets | 80–120+; corollas 3.5–5 mm. |
40–60; corollas 2.5–3+ mm. |
Phyllaries | 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. |
22–26 in 3–4+ series, the longer ± lanceolate, 3–4 mm (l/w = 2.5–5), apices acute, abaxial faces ± strigillose. |
Heads | at tips of stems (usually surpassed by leaves). |
± sessile. |
Cypselae | 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. |
2–2.5 mm, faces hairy, hair tips glochidiform; pappi persistent; on ray cypselae 12–15 lance-subulate scales 0.1–0.5 mm; on disc cypselae 12–15+ subulate to setiform scales 2.5–3+ mm. |
2n | = 18. |
|
Townsendia texensis |
Townsendia gypsophila |
|
Phenology | Flowering May–Jun. | Flowering Apr–Sep. |
Habitat | Cherts, limestone slopes | Gypsum outcrops |
Elevation | 1200 m (3900 ft) | 1600–2100 m (5200–6900 ft) |
Distribution |
OK; TX |
NM |
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 20, p. 196. | FNA vol. 20, p. 199. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Larsen: Ann. Missouri Bot. Gard. 14: 15, plate 3. (1927) | Lowrey & P. J. Knight: Brittonia 46: 194, fig. 2. (1994) |
Web links |