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Hesperevax sparsiflora
Erect dwarf-cudweed is a small, woolly annual herb from California and Oregon, reaching under 18 cm tall, with tiny greenish or whitish flower heads that are among the smallest composite inflorescences known. It is a wild plant of sandy coasts and serpentine hills rather than a garden or houseplant, so it is grown mainly for native restoration or study.
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. This is the world's smallest composite inflorescence.
There are two varieties:
Stemless dwarf-cudweed · Dwarf dwarf-cudweed · Dwarf-cudweed
Text excerpted from the Wikipedia article Hesperevax sparsiflora by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
