Senecio flaccidus var. flaccidus

Illustrated
Synonyms: Senecio douglasii var. jamesii (Bentham) L. D. Benson Senecio douglasii var. longilobus Senecio longilobus
Treatment appears in FNA Volume 20. Treatment on page 559. Mentioned on page 558.

Herbage usually tomentose (hairs whitish), sometimes unevenly glabrescent. calyculi: bractlets minute or 0. involucres cylindric or weakly campanulate. phyllaries ± 13 (± 21), 5– 8+ mm.


Phenology: Flowering mostly summer–fall, less frequently spring.
Habitat: Dry, open sandy or rocky plains, streambeds, and canyons
Elevation: 800–2400 m

Distribution

V20-1239-distribution-map.gif

Ariz., Colo., Kans., N.Mex., Okla., Tex., Utah, Mexico

Discussion

Senecio flaccidus var. flaccidus intergrades at least to some extent with var. monoensis in areas of overlapping ranges; a case could be made for treating the two as distinct species, as done by A. Cronquist (1994).

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
racemiform +, paniculiform +, corymbiform +  and cymiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
Lessing +
decurrent +
10 cm100 mm <br />0.1 m <br /> (12 cm120 mm <br />0.12 m <br />) +
narrowly linear;filiform +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
winged;nerved;ribbed +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Colo. +, Kans. +, N.Mex. +, Okla. +, Tex. +, Utah +  and Mexico +
800–2400 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, open sandy or rocky plains, streambeds, and canyons +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
glabrescent +  and tomentose +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
campanulate;cylindric +
petiolate +  and sessile +
distributed +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
2-carpellate +
persistent +
Flowering mostly summer–fall, less frequently spring. +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
mostly oblong +  and lanceolate or linear +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Illustrated +
appendaged +  and truncate +
papillate +
Senecio douglasii var. jamesii +, Senecio douglasii var. longilobus +  and Senecio longilobus +
Senecio flaccidus var. flaccidus +
Senecio flaccidus +
variety +
campanulate +
black +  and green +
toothed +  and entire +
perennial +, biennial +  and annual +
shrub +  and subshrub +