Dieteria asteroides

Torrey in W. H. Emory

in W. H. Emory, Not. Milit. Reconn., 141. 1848.

Synonyms: Machaeranthera asteroides (Torrey) Greene
Treatment appears in FNA Volume 20. Treatment on page 396.

Biennials or short-lived perennials. Stems, branches, and peduncles usually hairy, puberulent, or canescent, often sparsely stipitate-glandular (glabrous or densely stipitate-glandular in var. glandulosa). Leaf-blades lanceolate to oblanceolate, mid 20–100 × (2–) 6–20 mm, margins entire to irregularly serrate, faces puberulent or canescent, often sparsely short-stipitate-glandular (densely, stiffly long-stipitate-glandular in var. glandulosa); distal bases cordate to auriculate, clasping. Involucres broadly turbinate to hemispheric. Phyllaries in 5–12 series, spreading to reflexed, apices acute to long-acuminate, 1–6 mm, herbaceous, faces puberulent or canescent throughout (on both indurate bases and foliaceous apices), sometimes sparsely stipitate-glandular (moderately to densely stipitate-glandular in var. glandulosa). Receptacles 3.5–7 mm diam. Ray-florets pistillate, fertile; laminae white to purple, 10–20 × 0.8–1.5 mm. Disc corollas 5–8 mm. Cypselae glabrous or moderately appressed-hairy.

Distribution

V20-901-distribution-map.gif

Ariz., Calif., N.Mex., Nev., Utah, Mexico

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Stems glabrous or stipitate-glandular; leaves stiffly stipitate-glandular Dieteria asteroides var. glandulosa
1 Stems hairy, puberulent, or canescent, sometimes sparsely stipitate-glandular; leaves puberulent or canescent, sometimes sparsely stipitate-glandular > 2
2 Mid leaf blades 6–20 mm wide, margins usually serrate or serrulate; involucres hemispheric; phyllary apices long-acuminate, 3–6 mm Dieteria asteroides var. asteroides
2 Mid leaf blades 2–6 mm wide, margins entire or slightly serrulate; involucres usually broadly turbinate, rarely hemispheric; phyllary apices acute to acuminate, 1–3 mm Dieteria asteroides var. lagunensis
... more about "Dieteria asteroides"
not tailed +, rounded +  and obtuse +
distinct +
stipitate-glandular +  and hairy +
subequal +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
David R. Morgan +
Torrey in W. H. Emory +
decurrent +
indurate +
linear;oblanceolate;linear;oblanceolate;lanceolate;oblong;obovate;ovate +
rugulose +  and muricate +
white +  and tawny +
not 2-lipped +  and actinomorphic +
yellow +, purple +, violet +, blue +  and white +
8-12-ribbed +  and smooth +
beaked +, 2-ribbed +  and 5-ribbed +
appressed-hairy +  and glabrous +
flattened +, linear +  and obovoid +
fertile +  and bisexual +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
fertile +  and bisexual +
Ariz. +, Calif. +, N.Mex. +, Nev. +, Utah +  and Mexico +
stipitate-glandular +, canescent +, puberulent +  and short-stipitate-glandular +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
broadly turbinate;hemispheric +
0.6 cm6 mm <br />0.006 m <br /> (3 cm30 mm <br />0.03 m <br />) +
white +  and purple +
10mm;20mm +
0.8mm;1.5mm +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
petiolate +  and sessile +
cauline +, proximal +  and basal +
deltate +  and lanceolate +
entire +  and irregularly serrate +
2-carpellate +
persistent +
stipitate-glandular +, canescent +, puberulent +  and hairy +
spreading +  and reflexed +
lanceolate +  and linear +
in W. H. Emory, Not. Milit. Reconn., +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
erect +  and ascending +
appendaged +  and truncate +
papillate +  and smooth +
Machaeranthera asteroides +
Dieteria asteroides +
Dieteria +
species +
perennial +, short-lived +  and biennial +
10 cm100 mm <br />0.1 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, shrub +  and subshrub +