Pectis papposa
Pectis papposa var. grandis
chinchweed, common chinchweed, manybristle chinchweed
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).
20–60 mm.
3–40 mm.
10–40 mm.
campanulate to cylindric.
(7–)8(–10);
corollas 3–8 mm.
5–8 mm.
6–34;
corollas 2–5.5 mm (weakly 2-lipped, glabrous or glandular-puberulent).
12–24(–34);
corollas 3–5 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).
5–8 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.
3–5.5 mm;
disc pappi 2.5–4 mm.
= 24.
Pectis papposa
Pectis papposa var. grandis
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 grandis is restricted for the most part to the Chihuahuan Desert with outlying populations in central Arizona. It often grows with Pectis angustifolia var. angustifolia in trans-Pecos Texas, especially on roadsides; occasional hybrids have been noted.
(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
