Parthenice

A. Gray

Smithsonian Contr. Knowl. 5(6): 85. 1853.

Etymology: No etymology in protologue evidently alluding to similarities to members of genus Parthenium
Treatment appears in FNA Volume 21. Treatment on page 23. Mentioned on page 8, 9.

Annuals, 20–200 cm. Stems erect. Leaves cauline; alternate; petiolate; blades (3-nerved) deltate to ovate, margins entire or toothed, faces usually softly pubescent, sometimes rough-hairy. Heads obscurely radiate or disciform, borne in loose, paniculiform arrays. Involucres hemispheric, 3–5 mm. Phyllaries persistent (outer) or falling, 13, distinct, outer 5 herbaceous (becoming reflexed), inner 6–8 membranous (each becoming cupped around a cypsela). Receptacles convex; paleae of 2 kinds: peripheral purplish-mottled, becoming somewhat fleshy and arcuate-clavate, shed together in pairs with each cypsela; inner 0 or narrowly conic, persistent. Ray-florets 6–8; corollas yellowish (minute), glandular. Disc-florets 10–25+, functionally staminate; corollas yellowish, funnelform, distally glandular and hairy (anthers ± connate). Cypselae (ray) strongly obcompressed to obflattened, obovate, tuberculate, shed with 2 adjacent, ± fleshy paleae; pappi 0 or rudimentary. x = 18.

Distribution

Ariz., nw Mexico

Discussion

Species 1.

Lower Taxa

... more about "Parthenice"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
John L. Strother +
A. Gray +
decurrent +
compound +  and simple +
deltate;ovate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
villous +, strigillose +, hispidulous +, glabrous +  and warty +
tuberculate +
obovate +  and obcompressed +
fertile +  and bisexual +
Ariz. +  and nw Mexico +
No etymology in protologue +  and evidently alluding to similarities to members of genus Parthenium +
rough-hairy +  and pubescent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
disciform +  and radiate +
discoid +  and disciform +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
hemispheric +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
inner +  and peripheral +
conspicuous +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
toothed +  and entire +
2-carpellate +
purplish-mottled +
persistent +
conic;arcuate-clavate +
persistent +
rudimentary +
unequal +  and subequal +
Smithsonian Contr. Knowl. +
bearing subulate enations +, hairy +  and bristly +
sauck1975a +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Ambrosieae +  and Undefined (tribe Undefined) subtribe Iveae +
Parthenice +
Asteraceae (tribe Heliantheae) subtribe Ambrosiinae +
campanulate +  and cylindric +
toothed +  and entire +
20 cm200 mm <br />0.2 m <br /> (200 cm2,000 mm <br />2 m <br />) +
shrub +  and subshrub +