Pectis papposa
Pectis imberbis
chinchweed, common chinchweed, manybristle chinchweed
beardless chinchweed, tall chinchweed
ascending, glabrous or puberulent.
erect, glabrous.
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).
narrowly linear, 10–50 × 1–2 mm (sometimes smaller, bractlike distally), margins with 0–1 pairs of setae, faces glabrous (abaxial dotted near each margin with a row of elliptic oil-glands ca. 0.3 mm).
3–40 mm.
10–80 mm.
campanulate to cylindric.
cylindric.
(7–)8(–10);
corollas 3–8 mm.
5;
corollas 6–11 mm (laminae often dotted near margins with inconspicuous oil-glands).
6–34;
corollas 2–5.5 mm (weakly 2-lipped, glabrous or glandular-puberulent).
4–7;
corollas 3.7–6 mm (lobes 5, equal, each with 1 subterminal oil-gland).
distinct, linear, 3–8 × 0.5–1.7 mm (dotted with 1–5 subterminal oil-glands plus 2–5 pairs of submarginal oil-glands).
distinct, linear-oblong, 5–9.5 × 1–1.5 mm (each dotted with 1–2 swollen, subapical oil-glands and a row of 2–3 linear, submarginal oil-glands on each side of midrib).
in congested or open, cymiform arrays.
borne singly or in 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, puberulent (hair tips blunt);
pappi of 1–3 stout awns 1–2 mm or coroniform.
= 24.
Pectis papposa
Pectis imberbis
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.)
Pectis imberbis occurs in relatively small, widely separated populations. Overgrazing may be a factor in the scarcity of these plants. They are generally more than 25 cm before they begin to flower and may be unable to reproduce under grazing pressure.
(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
