Flora of North America species comparison

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Thymophylla acerosa

pricklyleaf dogweed
Habit Subshrubs or shrubs, green, to 25 cm, usually puberulent, sometimes glabrescent, rarely glabrous.
Stems

erect (branched from bases).
Leaves

mostly opposite;

blades not lobed, linear to acerose, 10–18 mm.
Peduncles

0–10 mm, puberulent or glabrous.
Involucres

campanulate to cylindric, 5–7 mm.
Ray florets

7–8;

corollas lemon-yellow, laminae 5–6 × 2–3 mm.
Disc florets

18–25+;

corollas pale yellow, 3–4 mm.
Phyllaries

ca. 13, margins of outer distinct less than 1/6 their lengths, abaxial faces puberulent or glabrous.
Calyculi

of 5 lance-linear bractlets, lengths 1/2+ phyllaries.
Cypselae

3–3.5 mm;

pappi of ca. 20 scales (each a fascicle of 3–5 bristles), 3–4 mm.
2n

= 16, 24.

Thymophylla acerosa
Phenology Flowering through the year, mostly summer–fall.
Habitat Calcareous outcrops, gypseous soils
Elevation 1000–2000+ m (3300–6600+ ft)
Distribution
from FNA
AZ; NM; NV; TX; UT; Mexico
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 241.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Pectidinae > Thymophylla
Sibling taxa
T. aurea, T. concinna, T. micropoides, T. pentachaeta, T. setifolia, T. tenuiloba, T. tephroleuca
Synonyms Dyssodia acerosa
Name authority (de Candolle) Strother: Sida 11: 376. (1986)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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