Dieteria canescens var. glabra

(A. Gray) D. R. Morgan & R. L. Hartman

Sida 20: 1397. 2003.

Basionym: Machaeranthera canescens var. glabra A. Gray Smithsonian Contr. Knowl. 3(5): 89. 1852
Synonyms: Aster canescens var. viridis A. Gray M. linearis Greene
Treatment appears in FNA Volume 20. Treatment on page 401. Mentioned on page 398, 399.

Annuals or biennials, rarely short-lived perennials. Stems usually 1 (sometimes more), erect, glabrous, puberulent, or canescent, sometimes sparsely stipitate-glandular; branches ascending. Mid leaf-blades lanceolate to linear. Peduncles equaling or longer than involucres. Involucres campanulate to broadly turbinate, 6–10 (–12) mm. Phyllaries in 4–8 series, usually appressed, sometimes spreading, rarely reflexed; apices usually glabrous or moderately stipitate-glandular, rarely canescent. Ray-florets pistillate, fertile. Cypselae sparsely appressed-hairy.


Phenology: Flowering Jul–Sep.
Habitat: Grasslands, creosote bush scrublands, pinyon-juniper woodlands, pine forests
Elevation: 1000–2300 m

Distribution

V20-918-distribution-map.gif

Ariz., Colo., Kans., N.Mex., Tex., Wyo., Mexico (Chihuahua)

Discussion

Variety glabra is found in the western Great Plains, southern Rocky Mountain foothills, and Chihuahuan Desert.

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
distinct +
canescent +, stipitate-glandular +  and glabrous +
subequal +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
David R. Morgan +
(A. Gray) D. R. Morgan & R. L. Hartman +
decurrent +
indurate +
Machaeranthera canescens var. glabra +
linear;oblanceolate;linear;oblanceolate;lanceolate;oblong;obovate;ovate +
rugulose +  and muricate +
white +  and tawny +
not 2-lipped +  and actinomorphic +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
yellow +, purple +, violet +, blue +  and white +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
8-12-ribbed +  and smooth +
beaked +, 2-ribbed +  and 5-ribbed +
appressed-hairy +
flattened +, linear +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
clasping +  and not clasping +
Ariz. +, Colo. +, Kans. +, N.Mex. +, Tex. +, Wyo. +  and Mexico (Chihuahua) +
1000–2300 m +
stipitate-glandular +, hairy +, glabrous +, canescent +  and puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grasslands, creosote bush scrublands, pinyon-juniper woodlands, pine forests +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
campanulate;broadly turbinate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (3 cm30 mm <br />0.03 m <br />) +
purple +, blue +  and white +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
petiolate +  and sessile +
cauline +, proximal +  and basal +
deltate +  and lanceolate +
serrate +, entire +  and irregularly dentate +
2-carpellate +
persistent +
stipitate-glandular +, canescent +, puberulent +  and glabrous +
Flowering Jul–Sep. +
reflexed +  and spreading +
lanceolate +  and linear +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Illustrated +
appendaged +  and truncate +
papillate +  and smooth +
Aster canescens var. viridis +  and M. linearis +
Dieteria canescens var. glabra +
Dieteria canescens +
variety +
perennial +, short-lived +, biennial +  and annual +
10 cm100 mm <br />0.1 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, shrub +  and subshrub +