Hymenothrix
thimblehead
erect, branched.
basal and cauline; mostly alternate (proximal opposite);
petiolate;
blades 2-ternately [pinnately] lobed, ultimate margins entire, faces usually ± scabrellous (hairs white, antrorse, 0.1–0.5 mm), sometimes glabrate, sometimes gland-dotted.
obconic to hemispheric, 4–8+ mm diam.
flat or convex, knobby or smooth, epaleate.
0, or 3–8+, pistillate, fertile;
corollas yellowish.
10–30+, bisexual, fertile;
corollas yellowish or whitish or pinkish to purplish (sparsely glandular-hairy), tubes about equaling cylindric throats or much longer than broadly funnelform throats, lobes 5, lance-oblong or lance-linear.
persistent, 8–16 in 2–3 series (reflexed in fruit, obovate or oblanceolate to linear, subequal, sometimes subtended by 1–3 bractlets, thin-herbaceous to membranous, margins scarious, often tinged with purple).
radiate or discoid, in corymbiform to paniculiform arrays.
obpyramidal, 4–5-angled, faces ribbed and sparsely hairy (hairs straight);
pappi persistent, of 12–18 narrowly lanceolate to subulate, medially thickened, scarious-margined scales in 1 series, some or all ± aristate.
= 12.
Hymenothrix
Species 5 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Phyllaries (8–)12–16, mostly oblong to ovate or obovate; corollas white or pinkish to purplish, lobe lengths 2–3+ times throats; anthers pinkish to purplish | H. wrightii |
1. Phyllaries 8(–12), mostly linear to narrowly oblanceolate; corollas creamy to bright yellow, lobe lengths 0.3–1 times throats; anthers yellowish | → 2 |
2. Rays 3–8; corollas of disc florets mostly 5–7 mm | H. wislizeni |
2. Rays 0; corollas of disc florets mostly 4–4.5 mm | H. loomisii |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
