Pectis imberbis
Pectis angustifolia
beardless chinchweed, tall chinchweed
lemonscent, lemonscented cinchweed, limoncillo
erect, glabrous.
erect or ascending, glabrous or puberulent.
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).
linear, 10–45 × 1–3 mm, margins with 2–5 pairs of bristles 1–2 mm, faces glabrous (dotted with oil-glands 0.2–0.7 mm).
10–80 mm.
1–20 mm.
cylindric.
narrowly campanulate or cylindric.
5;
corollas 6–11 mm (laminae often dotted near margins with inconspicuous oil-glands).
8;
corollas 3–5(–7) mm (glandular puberulent or nearly glabrous).
4–7;
corollas 3.7–6 mm (lobes 5, equal, each with 1 subterminal oil-gland).
(7–)10–20;
corollas 2.5–3.5 mm (sometimes weakly 2-lipped, glandular puberulent).
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).
distinct, linear or narrowly oblanceolate, 2.5–5.5 × 0.5–1 mm (dotted subterminally with 1 or 2 swollen oil-glands and submarginally with 2–5 pairs of smaller oil-glands).
borne singly or in open, cymiform arrays.
in congested, cymiform arrays.
3.5–5 mm, puberulent (hair tips blunt);
pappi of 1–3 stout awns 1–2 mm or coroniform.
2.5–4 mm, strigillose (hair tips straight, forked);
pappi coroniform and/or of 0–7 scabrid awns or bristles 1–2 mm.
= 24.
Pectis imberbis
Pectis angustifolia
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.)
Varieties 3 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Bases of distal leaves notably expanded (often partially concealing peduncles); pappi usually coroniform, 0.1–0.3 mm (plus 1–7 awns or bristles in some Texas populations); herbage lemon-scented | var. angustifolia |
1. Bases of distal leaves seldom expanded; pappi either of 0–4 awns 0.5–1(–2) mm and sometimes additionally coroniform, or of 0–7 awns or bristles 1–3 mm and/or coroniform; herbage usually spicy-scented | → 2 |
2. Phyllaries widest near apices, each with subterminal oil gland 0.5–1 mm; pappi usually less than 1 mm; annuals or perennials; c Texas (Edwards Plateau) | var. fastigiata |
2. Phyllaries widest near middles, each with a subterminal oil-gland less than 0.5 mm; pappi often 1+ mm; annuals; s Texas, Mexico | var. tenella |
WildflowerSearch
iNaturalist
USDA Plants Database
KS Wildflowers
