Английская Википедия:Hesperevax sparsiflora
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Hesperevax sparsiflora is a species of flowering plant in the family Asteraceae known by the common name erect dwarf cudweed. It is native to California and Oregon, where it grows in several habitat types including sandy coastal areas and the serpentine soils of inland hills. This is a small woolly annual herb reaching maximum heights under 18 centimeters. It has oval to rounded or scoop-shaped leaves on short petioles which vary in morphology across varieties. Small flower heads appear between the leaves. They contain greenish or whitish disc florets.These florets are remarkably small, each being only 1/120th of an inch (0.2 millimeter) in width, and numbering 5 to 9 in the whole disc, which totals only 1/ 6th inch (3.8 mm) in width including bracts.[1][2] This is the world's smallest composite inflorescence.
There are two varieties:
- Hesperevax sparsiflora. var. brevifolia (short-leaved evax) is an uncommon coastal variety with leaves generally under a centimeter long
- Hesperevax sparsiflora var. sparsiflora is a longer-leaved variety which is more common but limited to California
References
External links
- Calflora: Hesperevax sparsiflora (Erect dwarf cudweed, Erect evax, Few flowered evax)
- Jepson Manual eFlora (TJM2) treatment
- USDA Plants Profile for Hesperevax sparsiflora (erect dwarf-cudweed)
- UC CalPhotos: Hesperevax sparsiflora var. brevifolia
- UC CalPhotos: Hesperevax sparsiflora var. sparsiflora
- Английская Википедия
- Gnaphalieae
- Flora of California
- Flora of Oregon
- Endemic flora of the United States
- Natural history of the California chaparral and woodlands
- Natural history of the California Coast Ranges
- Taxa named by Asa Gray
- Taxa named by Edward Lee Greene
- Flora without expected TNC conservation status
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