Dieteria canescens var. sessiliflora

(Nuttall) D. R. Morgan & R. L. Hartman

Sida 20: 1396. 2003.

Endemic
Basionym: Dieteria sessiliflora Nuttall Trans. Amer. Philos. Soc., n. s. 7: 301. 1840
Synonyms: Machaeranthera canescens var. sessiliflora (Nuttall) B. L. Turner Machaeranthera sessiliflora (Nuttall) Greene
Treatment appears in FNA Volume 20. Treatment on page 400. Mentioned on page 399.

Annuals, biennials, or short-lived perennials. Stems 1+, erect, canescent, usually gland-dotted; branches ascending. Mid leaf-blades linear-lanceolate to linear. Peduncles 0 (heads sessile) or shorter than involucres. Involucres narrowly to broadly turbinate, 6–10 (–12) mm. Phyllaries in 4–7 series, spreading to reflexed, apices often canescent, stipitate-glandular. Ray-florets pistillate, fertile. Cypselae sparsely to moderately appressed-hairy.


Phenology: Flowering Aug–Oct.
Habitat: Flats, canyon slopes
Elevation: 600–1800 m

Discussion

Variety sessiliflora is known only along the Snake River and its tributaries.

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
distinct +
stipitate-glandular +  and canescent +
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 +
(Nuttall) D. R. Morgan & R. L. Hartman +
decurrent +
indurate +
Dieteria sessiliflora +
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 +
600–1800 m +
stipitate-glandular +, hairy +, glabrous +, canescent +  and puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Flats, canyon slopes +
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 />) +
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 Aug–Oct. +
spreading +  and reflexed +
lanceolate +  and linear +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
gland-dotted +
appendaged +  and truncate +
papillate +  and smooth +
Machaeranthera canescens var. sessiliflora +  and Machaeranthera sessiliflora +
Dieteria canescens var. sessiliflora +
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 +