Porophyllum
poreleaf
erect, usually strictly branched.
cauline; opposite or alternate;
petiolate or sessile;
blades orbiculate to linear or filiform, margins crenate or entire, faces usually glabrous (oil-glands scattered and/or at margins).
cylindric to campanulate [turbinate], 3–12 mm diam.
convex to conic, pitted, epaleate.
0.
(5–)10–80[–100+], bisexual, fertile;
corollas usually yellow, sometimes whitish to greenish or purplish [brownish], tubes either very slender, much longer than funnelform throats, or stout, much shorter than narrowly cylindric throats, lobes 5, deltate to lanceolate (often unequal).
5–10 in ± 2 series (distinct to bases, oblong or lanceolate to linear, bearing oval to linear oil-glands).
0.
discoid, borne singly or in loose, ± corymbiform arrays.
cylindric to fusiform, hirtellous to villous [glabrous];
pappi persistent, of 25–50(–100) coarse to fine bristles in 1–2+ series.
= 12.
Porophyllum
Species ca. 25 (5 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Annuals; leaf blades oval or elliptic to obovate, 8–25+ mm wide | P. ruderale |
1. Perennials, or subshrubs or shrubs; leaf blades linear to filiform, 1–5 mm wide | → 2 |
2. Corollas whitish or purplish | P. gracile |
2. Corollas yellow (sometimes tinged reddish) | → 3 |
3. Subshrubs or shrubs, 20–60+ cm; phyllaries 7–10 | P. scoparium |
3. Perennials (rarely woody at bases), mostly 5–30 cm; phyllaries 5(–8) | → 4 |
4. Internodes mostly 1–5(–12) mm; leaf blades 8–15 × 2 mm; pappi: longer bristles 6–7 mm | P. pygmaeum |
4. Internodes mostly 10–20+ mm; leaf blades 20–60 × 1–2 mm; pappi: longer bristles 8–10 mm | P. greggii |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
