Pectis papposa
Pectis papposa var. papposa
chinchweed, common chinchweed, manybristle chinchweed
chinch-weed, manybristle chinchweed
ascending, glabrous or puberulent.
linear, 10–60 × 1–2 mm, margins with 1–3 pairs of setae, faces glabrous (dotted on margins with round to oval oil-glands 0.3–0.5 mm).
10–30 mm.
3–40 mm.
3–10(–25) mm.
campanulate to cylindric.
(7–)8(–10);
corollas 3–8 mm.
3–6 mm.
6–34;
corollas 2–5.5 mm (weakly 2-lipped, glabrous or glandular-puberulent).
6–14(–18);
corollas 2–3.5(–4) mm.
distinct, linear, 3–8 × 0.5–1.7 mm (dotted with 1–5 subterminal oil-glands plus 2–5 pairs of submarginal oil-glands).
3–5 mm.
in congested or open, cymiform arrays.
2–5.5 mm, strigillose to short-pilose (hair tips curled, bulbous);
ray pappi usually coroniform, rarely of 1+ awns or bristles 1–4 mm;
disc pappi usually of 16–24, subplumose bristles 1.5–4 mm, rarely coroniform.
2–4.5 mm;
disc pappi 1–2.5 mm.
= 24.
Pectis papposa
Pectis papposa var. papposa
Varieties 2 (2 in the flora).
Pectis papposa generally flowers following summer monsoon rains in the desert of southwestern United States and northern Mexico. In favorable years, it becomes an aspect dominant, coloring wide areas of the desert with its bright yellow heads.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Variety papposa is widely distributed in the Sonoran and Mojave deserts and reaches the western fringes of the Chihuahuan Desert in southeastern Arizona and southwestern New Mexico, where it intergrades with var. grandis in some localities.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Phyllaries 3–5 mm; disc florets 6–14(–18); disc pappi 1–2.5 mm | var. papposa |
1. Phyllaries 5–8 mm; disc florets 12–24(–34); disc pappi 2.5–4 mm | var. grandis |
CalFlora
WildflowerSearch
iNaturalist
USDA Plants Database
