Platyschkuhria integrifolia

(A. Gray) Rydberg

Bull. Torrey Bot Club 33: 155. 1906.

IllustratedEndemic
Basionym: Schkuhria integrifolia A. Gray Amer. Naturalist 8: 213. 1874 Bahia nudicaulis A. Gray 1883
Synonyms: Bahia nudicaulis var. desertorum (M. E. Jones) Cronquist Bahia nudicaulis var. oblongifolia (A. Gray) Cronquist Bahia nudicaulis var. ourolepis (S. F. Blake) Cronquist Platyschkuhria integrifolia var. desertorum (M. E. Jones) W. L. Ellison Platyschkuhria integrifolia var. oblongifolia (A. Gray) W. L. Ellison Platyschkuhria integrifolia var. ourolepis (S. F. Blake) W. L. Ellison
Treatment appears in FNA Volume 21. Treatment on page 394.

Leaf-blades 2–10 cm × 5–35+ mm. Involucres 9–12+ × 12–25+ mm. Ray corolla laminae 6–16 mm. Disc corollas 3–6 (–7) mm. Cypselae (1–) 3–5 (–8) mm; pappi 0.6–3+ mm. 2n = 24, 48, 60, 72.


Phenology: Flowering May–Jul.
Habitat: Seleniferous clays, shaley slopes
Elevation: 1100–2200 m

Distribution

V21-992-distribution-map.gif

Ariz., Colo., Mont., N.Mex., Utah, Wyo.

Discussion

Specimens of Platyschkuhria integrifolia with stems leafy over 3/4+ of their lengths have been called var. oblongifolia (mostly from “four-corners” area of Arizona, Colorado, New Mexico, and Utah). Those with leaves mostly on proximal 1/10–3/4 their stem lengths, peduncles little or not at all stipitate-glandular, and phyllary tips ± caudate have been called var. ourolepis (mostly from Uinta Basin, Utah). Those with leaves mostly on proximal 1/10–3/4 their stem lengths, leaf blades widest beyond their middles and rounded at tips, peduncles ± stipitate-glandular, and phyllary tips acute to acuminate have been called var. nudicaulis (mostly from Montana and Wyoming). Those with leaves mostly on proximal 1/10–3/4 their stem lengths, leaf blades widest proximal to their middles and acute at tips, peduncles ± stipitate-glandular, and phyllary tips obtuse to acute or acuminate have been called var. desertorum (mostly from western Colorado and eastern Utah).

Selected References

None.

Lower Taxa

None.
72 +, 60 +, 48 +  and 24 +
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
John L. Strother +
(A. Gray) Rydberg +
decurrent +
Schkuhria integrifolia +  and Bahia nudicaulis +
compound +  and simple +
ovate;lanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
connate +  and distinct +
yellow +  and orange +
0.6 cm6 mm <br />0.006 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
stipitate-glandular +  and hairy +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
4-angled +  and obpyramidal +
fertile +  and bisexual +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
fertile +  and bisexual +
Ariz. +, Colo. +, Mont. +, N.Mex. +, Utah +  and Wyo. +
1100–2200 m +
hairy +, glabrous +, stipitate-glandular +, glabrescent +, strigose +, less lanate +  and woolly or hispidulous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Seleniferous clays, shaley slopes +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate;more or less hemispheric +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
cauline +  and basal +
deltate +  and lance-deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
lance-elliptic +  and lance-subulate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering May–Jul. +
membranous-margined +
9 +  and 21 +
Bull. Torrey Bot Club +
bearing subulate enations +, hairy +  and bristly +
distinct +
4 +  and 20 +
exalbuminous +
Illustrated +  and Endemic +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Bahia nudicaulis var. desertorum +, Bahia nudicaulis var. oblongifolia +, Bahia nudicaulis var. ourolepis +, Platyschkuhria integrifolia var. desertorum +, Platyschkuhria integrifolia var. oblongifolia +  and Platyschkuhria integrifolia var. ourolepis +
Platyschkuhria integrifolia +
Platyschkuhria +
species +
campanulate +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
1 cm10 mm <br />0.01 m <br /> (80 cm800 mm <br />0.8 m <br />) +
toothed +  and entire +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
shrub +  and subshrub +