Townsendia rothrockii A.Gray ex Rothrock.

Rothrock's townsend daisy (en)

Species

Angiosperms > Asterales > Asteraceae > Townsendia

Characteristics

Perennials, 1–3 cm (± pulvinate). Stems ± erect; internodes 0.1–1+ mm, glabrous or ± strigose. Leaves basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous. Heads ± sessile or on peduncles 5–25+ mm. Involucres ± hemispheric, 12–28+ mm diam. Phyllaries 40–60+ in (3–)4–5+ series, the longer obovate to oblanceolate, 7–9+ mm (l/w = 2.5–5), apices obtuse to acute, abaxial faces glabrous. Ray florets 18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. Disc florets 60–100+; corollas 3.5–4.5+ mm. Cypselae 4 mm, faces nearly glabrous (discs) or sparsely hairy (ray, hairs mostly at bases), hair tips glochidiform; pappi persistent; on ray cypselae 12–20 lanceolate to subulate scales 0.5–1.5 mm; on disc cypselae 15–30 subulate to setiform scales 3–6 mm. 2n = 36 (apomicts).
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
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Root system -
Rooting depth (meter) -
Root diameter (meter) -
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Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
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Hardiness (USDA) -

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 30 - 90
Germination temperacture (C°) 15
Germination luminosity -
Germination treatment -
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Optimum temperature (C°) -
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Distribution

Townsendia rothrockii world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:255895-1
WFO ID wfo-0000040905
COL ID 57L8N
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Townsendia rothrockii