Senecio fremontii in Flora of North America @ efloras.org

42. Senecio fremontii Torrey & A. Gray, Fl. N. Amer. 2: 445. 1843.

Senecio ductoris Piper.

Perennials, 10–30(–40) cm (perennating bases subrhizomatous, spreading, sometimes knotty-woody). Herbage (often purple-tinged) glabrous. Stems clustered (arching upward to semiprostrate). Leaves evenly distributed or smaller and fewer distally (somewhat stiffish-succulent when fresh, proximalmost and distalmost often smaller, bractlike); petiolate; blades ovate or obovate to oblanceolate, 2–5(–7) × 1–3(–4) cm, bases ± truncate to tapered, margins laciniate to dentate or subentire. Heads 1–5+. Calyculi 0 or of 1–5+ usually lance-deltate to linear, sometimes foliaceous, bractlets (lengths mostly ¹/ 5 –¹/ 2 phyllaries). Phyllaries (± 8) ± 13 (± 21), 5–12 mm, tips green or brownish. Ray florets ± 8; corolla laminae 8–12 mm. Cypselae glabrous or strigose-hirtellous, at least on angles. 2n = 40, 40+, 80.

Varieties 4 (4 in the flora): w North America.

The varieties are distinguished by morphologic tendencies plus their geographic ranges.

1 Plants (10–)25–40 cm; stems straight or gently arching upward; leaves often to 7 × 3 cm, bases of larger ones weakly clasping; phyllaries (9–)10–12 mm 42c Senecio fremontii var. blitoides

+ Plants 10–20+ cm; stems usually arching upward; leaves usually smaller than 4 × 2 cm, bases not clasping; phyllaries 5–10 mm (2)

2 (1) Leaf margins notably laciniate or laciniate-toothed (segments sometimes also toothed) 42d Senecio fremontii var. inexpectatus

+ Leaf margins toothed or subentire (3)

3 (2) Leaves smaller and fewer distally; phyllaries 5–7(–8) mm 42b Senecio fremontii var. occidentalis

+ Leaves ± equally developed along stems; phyllaries (7–)8–10 mm 42a Senecio fremontii var. fremontii

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