Pectis longipes
Pectis angustifolia
longstalk chinchweed, longstalk cinchweed, mat cinchweed
lemonscent, lemonscented cinchweed, limoncillo
ascending to erect (very leafy), glabrous.
erect or ascending, glabrous or puberulent.
linear to linear-oblanceolate, 10–55 × 1–3 mm, margins with 1–4 pairs of setae, faces glabrous (conspicuously dotted on margins with round oil-glands 0.3–0.5 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).
(30–)50–160 mm.
1–20 mm.
campanulate.
narrowly campanulate or cylindric.
(8–)13(–15);
corollas 8–12 mm.
8;
corollas 3–5(–7) mm (glandular puberulent or nearly glabrous).
25–50;
corollas 4–6 mm (2-lipped).
(7–)10–20;
corollas 2.5–3.5 mm (sometimes weakly 2-lipped, glandular puberulent).
distinct, linear, linear-oblanceolate, or linear-elliptic, 5–8 × 0.7–2 mm (dotted with 1–3, swollen, subterminal oil-glands 0.3–0.4 mm plus 1–3 pairs of narrow, submarginal oil-glands).
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.
in congested, cymiform arrays.
2.5–4.5 mm, strigillose (hairs tips acute or blunt);
ray pappi of 1–2 awns 3–3.5 mm;
disc pappi of 2–30 unequal bristles 3–5 mm.
2.5–4 mm, strigillose (hair tips straight, forked);
pappi coroniform and/or of 0–7 scabrid awns or bristles 1–2 mm.
= 24, 48.
Pectis longipes
Pectis angustifolia
Pectis longipes has been listed from Texas in floras; I have seen no collections from that state.
Pectis longipes comprises two cytological races. Diploid, spicy-scented plants occur throughout the range. In southern Arizona, the diploid race is broadly sympatric but locally allopatric with a tetraploid, lemon-scented race. The tetraploid race is nested within the range of the diploids. The races are easily separable by odor, and although they are very similar morphologically, they can be separated also by statistically significant differences in floral dimensions and pollen size (M. A. Luckow 1983). Based upon those minute differences, the type collection is diploid. Because the races are so similar morphologically and because so many of the specimens of P. longipes in herbaria bear no indication of odor, I chose not to give the cytological races formal recognition.
(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
