Platyschkuhria

(A. Gray) Rydberg

Bull. Torrey Bot. Club 33: 154. 1906.

Etymology: Greek platys, broad, and genus Schkuhria
Basionym: Schkuhria sect. Platyschkuhria A. Gray Amer. Naturalist 8: 213. 1874
Treatment appears in FNA Volume 21. Treatment on page 394. Mentioned on page 364, 366, 383.
 TaxonIllustrator 
FNA21 P61 Amauriopsis dissecta.jpegAmauriopsis dissecta
Platyschkuhria integrifolia
Chamaechaenactis scaposa
Barbara Alongi
Linda Ann Vorobik
Linny Heagy

Perennials, 10–50+ cm (bases ± woody, branched caudices). Stems ± erect. Leaves basal and cauline; mostly alternate; petiolate; blades mostly lanceolate, sometimes ± ovate, margins en tire, faces sparsely to densely scabrellous (hairs white, straight, conic or fusiform, 0.1–0.8 mm) and glanddotted. Heads radiate, borne singly or (3–11) in loose, corymbiform to paniculiform arrays. Involucres campanulate to ± hemispheric, 12–25+ mm diam. Phyllaries 9–21 in ± 2 series, distinct, subequal, oblong or elliptic to lanceolate, herbaceous, membranous-margined (not purplish-margined), persistent, reflexed in fruit. Receptacles ± convex, ± pitted, epaleate. Ray-florets 6–12, pistillate, fertile; corollas yellow. Disc-florets 25–80+, bisexual, fertile; corollas yellow to orange (glanddotted), tubes about equaling funnelform to campanulate throats, lobes 5, deltate to lance-deltate. Cypselae narrowly obpyramidal, 4-angled, finely nerved, ± hirsutulous (at least on angles), not glanddotted; pappi of 8–16, (distinct) lance-elliptic to lance-subulate (basally and/or medially thickened, distally and/or laterally scarious) scales in 1 series (weakly, if at all, aristate). x = 12.

Distribution

w United States

Discussion

Species 1.

... more about "Platyschkuhria"
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 sect. Platyschkuhria +
compound +  and simple +
ovate;lanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
connate +  and distinct +
yellow +  and orange +
stipitate-glandular +  and hairy +
4-angled +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
w United States +
Greek platys, broad, and genus Schkuhria +
hairy +, glabrous +, stipitate-glandular +, glabrescent +, strigose +, less lanate +  and woolly or hispidulous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
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 />) +
campanulate;more or less hemispheric +
cauline +  and basal +
deltate +  and lance-deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
lance-elliptic +  and lance-subulate +
membranous-margined +
9 +  and 21 +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
brown1983a +  and ellison1971a +
distinct +
4 +  and 20 +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Platyschkuhria +
Asteraceae (tribe Heliantheae) subtribe Chaenactidinae +
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 +