Psathyrotes pilifera

A. Gray

Proc. Amer. Acad. Arts 19: 50. 1883.

Endemic
Treatment appears in FNA Volume 21. Treatment on page 418. Mentioned on page 417.

Annuals, 6–15 cm, glandular-pubescent, pilose, and furfuraceous. Stems erect and spreading. Leaf-blades rounded-rhombic, 7–14 × 6–14 mm, margins entire (faces, at least abaxial, with straight, multicellular hairs 2–3+ mm). Peduncles 4–20 mm. Involucres narrowly cylindric, 7–9 mm. Phyllaries ca. 13, outer persistent, 5, lanceolate, tips erect, inner falling, 8, lance-linear, tips erect. Florets 9–14; corollas yellow, often purplish at tips, ca. 8 mm. Cypselae 4–5 mm; pappi of ca. 150 subequal bristles in 2–4 series, 6–7 mm. 2n = 34.


Phenology: Flowering sporadically following rains.
Habitat: Reddish, alkaline soils
Elevation: 500–1400 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Psathyrotes pilifera"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
A. Gray +
decurrent +
Bulbostylis sect. Psathyrotus +
compound +  and simple +
suborbiculate;rounded-rhombic;suborbiculate;rounded-rhombic;reniform;rounded-deltate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
connate +  and distinct +
subequal +
purplish +  and yellow +
8 cm80 mm <br />0.08 m <br /> (?) +
glabrate +  and hairy +
cylindro-fusiform +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Nev. +  and Utah. +
500–1400 m +
furfuraceous +, glandular-pubescent +, tomentose +, pilose +  and lanate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Reddish, alkaline soils +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
cauline +  and basal +
deltate +
entire +  and toothed +
connate +  and distinct +
unequal +  and subequal +
2-carpellate +
persistent +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering sporadically following rains. +
Proc. Amer. Acad. Arts +
neuter +, styliferous +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
flat;convex +
of 35 +  and 150 bristles +
exalbuminous +
spreading +  and erect +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Psathyrotes pilifera +
Psathyrotes +
species +
cylindric +
dilated +
toothed +  and entire +
furfuraceous +, pilose +  and glandular-pubescent +
6 cm60 mm <br />0.06 m <br /> (15 cm150 mm <br />0.15 m <br />) +
shrub +  and subshrub +