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Parthenice
Parthenice
Family:
Asteraceae
Anthony Mendoza
Flora of North America
Resources
John L. Strother in Flora of North America (vol. 21)
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.
Species within inventory project:
Arizona Flora
Parthenice mollis