Flora of North America species comparison

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Pectis angustifolia

lemonscent, lemonscented cinchweed, limoncillo
Habit Annuals or perennials, 1–20 cm (caudices slender, woody); herbage lemon-scented or spicy-scented.
Stems

erect or ascending, glabrous or puberulent.
Leaves

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).
Peduncles

1–20 mm.
Involucres

narrowly campanulate or cylindric.
Ray florets

8;

corollas 3–5(–7) mm (glandular puberulent or nearly glabrous).
Disc florets

(7–)10–20;

corollas 2.5–3.5 mm (sometimes weakly 2-lipped, glandular puberulent).
Phyllaries

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).
Heads

in congested, cymiform arrays.
Cypselae

2.5–4 mm, strigillose (hair tips straight, forked);

pappi coroniform and/or of 0–7 scabrid awns or bristles 1–2 mm.

Pectis angustifolia
Distribution
from FNA
AZ; CO; KS; NE; NM; OK; TX; UT; WY; Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 3 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
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
Source FNA vol. 21, p. 228.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Pectidinae > Pectis
Sibling taxa
P. cylindrica, P. filipes, P. glaucescens, P. humifusa, P. imberbis, P. linearifolia, P. linifolia, P. longipes, P. papposa, P. prostrata, P. rusbyi, P. ×floridana
Subordinate taxa
P. angustifolia var. angustifolia, P. angustifolia var. fastigiata, P. angustifolia var. tenella
Name authority Torrey: Ann. Lyceum Nat. Hist. New York 2: 214. (1827)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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