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Helianthus californicus
DC.
Family:
Asteraceae
California Sunflower
FNA
Resources
Edward E. Schilling in Flora of North America (vol. 21)
Perennials,
150-350 cm (rhi-zomatous).
Stems
erect, glabrous (glaucous). Leaves mostly cauline; mostly alternate; petioles 0-3 cm; blades (light to dark green, 3-nerved distal to bases), lanceolate, 10-20 × 2.5-6 cm, bases ± cuneate, margins entire or subentire, abaxial faces hispid to hirsute, gland-dotted.
Heads
3-10.
Peduncles
(1-)3-15 cm (gland-dotted).
Involucres
broadly hemispheric, 10-25 mm diam.
Phyllaries
25-35 (loose
)
, lanceolate, 8-15 × 3-5 mm (notably surpassing discs), (margins sometimes ciliate) apices acute to attenuate, abaxial faces hispidulous to glabrate, gland-dotted.
Paleae
10-11 mm, 3-toothed (apices acute, hispidulous).
Ray florets
12-21; laminae 15-30 mm.
Disc florets
50+; corollas 6-8 mm, lobes yellow; anthers reddish to dark, appendages reddish brown.
Cypselae
4.5-5 mm, glabrate;
pappi
of 2 aristate scales 3-4 mm.
2
n
= 102.
Flowering summer-fall. Stream banks, wet meadows, freshwater marshes; to 1600 m; Calif.; Mexico (Baja California).
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This project made possible by
National Science Foundation Award 1410069
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