All Floras      Advanced Search
FNA Vol. 21 Page 224, 228 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 21 | Asteraceae | Pectis

10. Pectis angustifolia Torrey, Ann. Lyceum Nat. Hist. New York. 2: 214. 1827.

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). Heads in congested, cymiform arrays. Peduncles 1–20 mm. Involucres narrowly campanulate or cylindric. 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). 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). Cypselae 2.5–4 mm, strigillose (hair tips straight, forked); pappi coroniform and/or of 0–7 scabrid awns or bristles 1–2 mm.

Varieties 3 (3 in the flora): w United States; Mexico.

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   10a Pectis angustifolia var. angustifolia
+ 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 (1) 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)   10b Pectis angustifolia var. fastigiata
+ Phyllaries widest near middles, each with a subterminal oil-gland less than 0.5 mm; pappi often 1+ mm; annuals; s Texas, Mexico   10c Pectis angustifolia var. tenella


Related Objects  
  • Distribution Map
  • Map

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |