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FNA | Family List | FNA Vol. 21 | Asteraceae | Liatris

5. Liatris punctata Hooker, Fl. Bor.-Amer. 1: 306, plate 105. 1833.

Plains or dotted gayfeather

Lacinaria punctata (Hooker) Kuntze

Plants 15–85 cm. Corms globose to depressed-globose or elongate, sometimes becoming simple or branched rhizomes. Stems glabrous. Leaves: basal and proximal cauline 1-nerved, linear, 50–140 × 1–7 mm, gradually or little reduced distally, essentially glabrous or sparsely piloso-hirsutulous, gland-dotted (margins sometimes ciliate). Heads in dense to loose, spiciform arrays. Involucres campanulate-cylindric, 7–15 × (4–)5–7 mm. Peduncles 0 or very rarely 1–2 mm. Phyllaries in 3–6 series, mostly oblong-obovate, unequal, essentially glabrous, margins without hyaline borders, sometimes ciliate, apices acute, acute-acuminate, obtuse, rounded, or rounded-truncate (often with indurate apicula or mucros, lateral veins usually not evident beyond middle or at least on distal 1/3). Florets 3–8; corolla tubes glabrous inside. Cypselae (5.5–)6–8.5 mm; pappi: lengths ± equaling corollas, bristles plumose.

Varieties 3 (3 in the flora): North America, n Mexico.

1 Corms globose to depressed-globose; involucres 7–9(–12) mm; phyllaries in (4–)5–6 series; florets (3–)4–5(–6)   5c Liatris punctata var. mucronata
+ Corms elongate or becoming rhizomes; involucres 10–14 mm; phyllaries in 4(–5) series; florets 4–8   (2)
2 (1) Heads in dense, spiciform arrays (closely spaced, stems usually obscured by heads)   5a Liatris punctata var. punctata
+ Heads in loose, spiciform arrays (widely spaced, stems evident)   5b Liatris punctata var. mexicana


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