Senecio multidentatus var. huachucanus

(A. Gray) T. M. Barkley

Phytologia 67: 238. 1989.

Conservation concern
Basionym: Senecio huachucanus A. Gray Proc. Amer. Acad. Arts 19: 54. 1883
Treatment appears in FNA Volume 20. Treatment on page 567.
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Perennials, 60–100+ cm (rhizomes weakly spreading). Herbage glabrous or sparsely and unevenly floccose or tomentose. Stems single (erect). Leaves evenly distributed; petiolate; blades ovate to lanceolate, (7–) 10–20+ × 4–6 (–7) cm, bases ± tapered, margins dentate or denticulate (denticles callous; distal leaves smaller, clasping, bractlike). Heads 4–12 in open, cymiform arrays. Calyculi of 5–10 bractlets (0.5–2.5 mm). Phyllaries ± 13, 4–6 (–7) mm, tips black. Ray-florets ± 8; corolla laminae 5–8 mm. Cypselae glabrous.


Phenology: Flowering spring–summer.
Habitat: Mountains
Elevation: 1800–2200 m

Discussion

Of conservation concern.

Variety huachucanus is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
cymiform +  and open +
indeterminate +  and determinate +
Theodore M. Barkley† +
(A. Gray) T. M. Barkley +
tapered +
Senecio huachucanus +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
6 cm60 mm <br />0.06 m <br /> (7 cm70 mm <br />0.07 m <br />) +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
ovate;lanceolate +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
winged;nerved;ribbed +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +  and Mexico +
1800–2200 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Mountains +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
tomentose +, floccose +, 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 +
distributed +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
denticulate +  and dentate +
2-carpellate +
persistent +
Flowering spring–summer. +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
mostly oblong +  and lanceolate or linear +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Conservation concern +
appendaged +  and truncate +
papillate +
Compositae +
Senecio multidentatus var. huachucanus +
Senecio multidentatus +
variety +
campanulate +
denticulate +  and serrate or toothed +
60 cm600 mm <br />0.6 m <br /> (100 cm1,000 mm <br />1 m <br />) +
100 cm1,000 mm <br />1 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
shrub +  and subshrub +