Senecio amplectens

A. Gray

Amer. J. Sci. Arts, ser. 2, 33: 240. 1862.

IllustratedEndemic
Synonyms: Ligularia amplectens (A. Gray) W. A. Weber
Treatment appears in FNA Volume 20. Treatment on page 552. Mentioned on page 546.

Perennials, (5–) 10–60 cm (rhizomatous or with branched caudices). Herbage (often purplish-tinged) glabrous or sparsely and unevenly hairy, especially near leaf-axils and among heads, usually glabrescent. Stems single or loosely clustered. Leaves usually progressively reduced distally (basal sometimes smaller than proximal or mid leaves); petiolate (petioles shorter than to equaling blades, often clasping); blades broadly lanceolate or lanceolate to oblanceolate, (5–) 10–20+ × 2–4 (–5+) cm, bases tapered, margins dentate to denticulate (distal leaves smaller, bractlike). Heads nodding, 1–5 (–10). Calyculi of 2–5+ linear to filiform bractlets (lengths to 1/2 phyllaries). Phyllaries ± 13 or ± 21, tips often black or brownish (sometimes with scattered black hairs). Ray-florets usually ± 13, sometimes fewer; corolla laminae (10–) 15–25 mm. Cypselae glabrous. 2n = 40, ca. 175–180.

Distribution

V20-1215-distribution-map.gif

Colo., Mont., N.Mex., Nev., Utah, Wyo.

Discussion

Varieties 2 (2 in the flora).

The varieties of Senecio amplectens are distinguished by morphologic tendencies and habitat preferences; there are many intermediates. Where the ranges of the two overlap, var. amplectens occurs at slightly lower elevations than var. holmii.

Selected References

None.

Key

1 Plants (30–)40–60+; herbage sometimes sparsely hairy; leaves mostly proximal and mid cauline; phyllaries frequently black or purplish toward tips, sometimes with black hairs on abaxial faces Senecio amplectens var. amplectens
1 Plants (5–)10–20(–30) cm; herbage glabrous or glabrate at flowering; leaves mostly basal and proximal; phyllaries green or light purplish, glabrous Senecio amplectens var. holmii
... more about "Senecio amplectens"
175 +  and 180 +
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
racemiform +, paniculiform +, corymbiform +  and cymiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
A. Gray +
tapered +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
lanceolate;oblanceolate +
2cm;4cm +
winged;nerved;ribbed +
linear;filiform +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Colo. +, Mont. +, N.Mex. +, Nev. +, Utah +  and Wyo. +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
glabrescent +, hairy +, sparsely +  and glabrous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
turbinate;campanulate +
cauline +  and basal +
reduced +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
dentate +  and denticulate +
2-carpellate +
persistent +
mostly oblong +  and lanceolate or linear +
Amer. J. Sci. Arts, ser. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Illustrated +  and Endemic +
appendaged +  and truncate +
papillate +
Ligularia amplectens +
Senecio amplectens +
species +
campanulate +
brownish +  and black +
denticulate +  and serrate or toothed +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
10 cm100 mm <br />0.1 m <br /> (60 cm600 mm <br />0.6 m <br />) +
shrub +  and subshrub +