Psathyrotes pilifera
Proc. Amer. Acad. Arts 19: 50. 1883.
Endemic
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
Distribution
Ariz., Nev., Utah.
Discussion
Selected References
None.
Lower Taxa
None.
... more about "Psathyrotes pilifera"
introrse +
connate +
herbaceous +
scarious +
absent +
hirsute +
papillate +
continuous +
decurrent +
suborbiculate;rounded-rhombic;suborbiculate;rounded-rhombic;reniform;rounded-deltate +
winged;ribbed;winged;ribbed +
1;15 +
stigmatic +
subequal +
absent +
zygomorphic +
8 cm80 mm <br />0.08 m <br /> (?) +
monomorphic +
dimorphic +
4mm;5mm +
staminate +
staminate +
straight +
distinct +
proximal +
9;14 +
bisexual +
dispersed +
corymbiform +
singly +
discoid +
singly +
indeterminate +
lance-linear +
falling +
surrounding +
cylindric +
rounded-rhombic +
6mm;14mm +
petiolate +
alternate +
erect +
deltate +
persistent +
lanceolate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
tough +
thick +
absent +
connate +
persistent +
distinct +
falling +
unequal +
Proc. Amer. Acad. Arts +
1883 +
absent +
epaleate +
flat;convex +
fibrous +
absent +
exalbuminous +
modifed +
2;4 +
Endemic +
alternate +
branched +
2-branched +
papillate +
Psathyrotes pilifera +
Psathyrotes +
species +
cylindric +
erect +
much shorter +
dilated +
equaling +
annual +