Psathyrotes ramosissima

(Torrey) A. Gray

Proc. Amer. Acad. Arts 7: 363. 1868.

Common names: Turtleback
Basionym: Tetradymia ramosissima Torrey in W. H. Emory, Not. Milit. Reconn., 145. 1848
Treatment appears in FNA Volume 21. Treatment on page 417.

Annuals or perennials, 3–30 cm; lanate, furfuraceous. Stems erect and spreading, much branched. Leaf-blades rounded-deltate to suborbiculate, 8–25 × 8–30 mm, margins toothed. Peduncles 3–50 mm. Involucres broadly turbinate to campanulate, 6–10 mm. Phyllaries 15–24, outer persistent, 5–6, apically spatulate, tips reflexed to squarrose, inner falling, 10–18, apically lanceolate, tips erect. Florets 16–32; corollas pale-yellow, 4.5–5 mm. Cypselae 1.5–3.5 mm; pappi of 120–140 subequal bristles in 2–4 series, 3–4 mm. 2n = 34.


Phenology: Flowering mostly in spring, otherwise sporadically, following rains.
Habitat: Sandy soils and desert pavements
Elevation: -30–900 m

Distribution

V21-1043-distribution-map.gif

Ariz., Calif., Nev., Mexico (Baja California), Mexico (Sonora)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Psathyrotes ramosissima"
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 +
(Torrey) A. Gray +
decurrent +
Tetradymia ramosissima +
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 +
Turtleback +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
glabrate +  and hairy +
cylindro-fusiform +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Calif. +, Nev. +, Mexico (Baja California) +  and Mexico (Sonora) +
-30–900 m +
furfuraceous +, glandular-pubescent +, tomentose +, pilose +  and lanate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy soils and desert pavements +
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 />) +
broadly turbinate;campanulate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
rounded-deltate;suborbiculate +
cauline +  and basal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
unequal +  and subequal +
2-carpellate +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering mostly in spring, otherwise sporadically, following rains. +
15 +  and 24 +
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 ramosissima +
Psathyrotes +
species +
cylindric +
erect +, reflexed +  and squarrose +
dilated +
toothed +  and entire +
perennial +  and annual +
lanate +  and furfuraceous +
3 cm30 mm <br />0.03 m <br /> (30 cm300 mm <br />0.3 m <br />) +
shrub +  and subshrub +