Senecio fremontii

Torrey & A. Gray

Fl. N. Amer. 2: 445. 1843.

Endemic
Synonyms: Senecio ductoris Piper.
Treatment appears in FNA Volume 20. Treatment on page 564. Mentioned on page 549, 560.

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.

Distribution

V20-1258-distribution-map.gif

Alta., B.C., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Varieties 4 (4 in the flora).

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

Selected References

None.

Key

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 Senecio fremontii var. blitoides
1 Plants 10–20+ cm; stems usually arching upward; leaves usually smaller than 4 × 2 cm, bases not clasping; phyllaries 5–10 mm > 2
2 Leaf margins notably laciniate or laciniate-toothed (segments sometimes also toothed) Senecio fremontii var. inexpectatus
2 Leaf margins toothed or subentire > 3
3 Leaves smaller and fewer distally; phyllaries 5–7(–8) mm Senecio fremontii var. occidentalis
3 Leaves ± equally developed along stems; phyllaries (7–)8–10 mm Senecio fremontii var. fremontii
... more about "Senecio fremontii"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
racemiform +, paniculiform +, corymbiform +  and cymiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
Torrey & A. Gray +
less truncate +  and tapered +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
obovate;oblanceolate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
winged;nerved;ribbed +
usually lance-deltate;linear +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
strigose-hirtellous +  and glabrous +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
turbinate;campanulate +
distributed +
cauline +  and basal +
smaller +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
laciniate +  and dentate or subentire +
2-carpellate +
persistent +
mostly oblong +  and lanceolate or linear +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Fl. N. Amer. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
appendaged +  and truncate +
papillate +
Senecio ductoris +
Senecio fremontii +
species +
campanulate +
brownish +  and green +
denticulate +  and serrate or toothed +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
100 cm1,000 mm <br />1 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
shrub +  and subshrub +