Perityle fosteri

A. M. Powell

Madroño 30: 217, fig. 1. 1983.

Common names: Foster’s rock daisy
EndemicConservation concern
Treatment appears in FNA Volume 21. Treatment on page 319. Mentioned on page 318.

Plants 6–15 cm (forming mats on rock faces, profusely branched, leafy); short-hairy. Leaves: petioles 4–8 mm; blades ± ovate to deltate overall, 5–12 × 5–12 mm, 3-lobed, ultimate margins entire. Heads borne singly or in corymbiform arrays, 6–7 × ca. 4 mm. Peduncles 2–5 mm. Involucres funnelform-cylindric. Phyllaries ca. 8, linear-lanceolate, 5–6 × 0.8–1.3 mm. Disc-florets ca. 10; corollas cream to pale-yellow, tubes 1 mm, throats tubular-funnelform, 3 mm, lobes 0.5 mm. Cypselae 1.5–1.6 mm; pappi of ca. 20 bristles 1–2 mm. 2n = 34.


Phenology: Flowering spring–fall.
Habitat: Rock faces in protected canyons
Elevation: 1500–1660 m

Discussion

Of conservation concern.

Perityle fosteri, possibly a close relative of P. rupestris, is known only from Culberson County.

Selected References

None.

Lower Taxa

None.
... more about "Perityle fosteri"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Sharon C. Yarborough +  and A. Michael Powell +
A. M. Powell +
decurrent +
Laphamia sect. Pappothrix +
compound +  and simple +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
3-lobed;less ovate;deltate +
5mm;12mm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Foster’s rock daisy +
cream +  and pale-yellow +
angled +, rounded +, oblong +  and narrowly oblanceolate partially flattened +
fertile +  and bisexual +
fertile +  and bisexual +
1500–1660 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rock faces in protected canyons +
discoid +  and radiate +
in corymbiform arrays +  and singly +
indeterminate +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
homogamous +  and heterogamous +
4 cm40 mm <br />0.04 m <br /> (?) +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
funnelform-cylindric +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
sessile +  and petiolate +
alternate +  and opposite +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
short-hairy +  and glabrous +
2-carpellate +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering spring–fall. +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
Endemic +  and Conservation concern +
erect +  and pendent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined sect. Pappothrix +
Perityle fosteri +
Perityle sect. Pappothrix +
species +
tubular-funnelform +
3 cm30 mm <br />0.03 m <br /> (?) +
1 cm10 mm <br />0.01 m <br /> (?) +
lobed +, toothed +  and entire +