Flora of North America species comparison

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Camissoniopsis micrantha

miniature suncup, Spencer primrose
Habit Herbs annual, densely villous, more densely so distally, also rarely glandular puberulent distally.
Stems

arising from base, usually decumbent, rarely with 1 erect, 15–60 cm.
Leaves

1–12 × 0.2–1.7 cm;

petiole 0–2 cm, distal ones 0–0.5 cm;

blade (basal) narrowly elliptic, (cauline) narrowly elliptic-lanceolate to lanceolate, base (basal) narrowly cuneate, (cauline) rounded, margins denticulate, apex acute.
Flowers

opening near sunrise;

floral tube 1.2–2 mm;

sepals 1–2.2(–2.5) mm;

petals yellow, sometimes with 1 or 2 red dots near base, 1.5–3.5(–4.5) mm; episepalous filaments 0.8–1.5 mm, epipetalous filaments 0.5–0.8(–1) mm, anthers 0.4–0.6 mm, less than 5% of pollen grains 4- or 5-pored;

style 2–3.5 mm, stigma surrounded by anthers at anthesis.
Capsules

straight or curved, equal to or slightly more than 1 complete spiral, subterete in living material, 4-angled when dry, 13–20(–25) × 1.1–1.2(–1.8) mm.
Seeds

0.7–1.1 mm.
2n

= 14.

Camissoniopsis micrantha
Phenology Flowering (Jan–)Mar–Jun(–Sep).
Habitat Coastal strand, coastal sage scrub, chaparral.
Elevation 0–300(–800) m. [0–1000(–2600) ft.]
Distribution
map from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Camissoniopsis micrantha occurs from the vicinity of Bodega Bay, Sonoma County, near Lower Lake, Lake County, and near Rio Vista, Sacramento County, south in the Coast Ranges to the Los Angeles Basin and the northern edge of San Diego County; also on San Miguel, Santa Rosa, Santa Cruz, and Santa Catalina islands. The species was introduced, apparently on ballast heaps, at Nanaimo, Vancouver Island, British Columbia (Macoun s.n. in 1893, NMC). It has apparently not persisted in this area. P. H. Raven (1969) determined C. micrantha to be self-compatible and primarily autogamous. Excluded populations are now recognized as C. hirtella, C. ignota, C. lewisii, and C. pallida.

Oenothera hirta Link (1821), not Linnaeus (1759), is an illegitimate name that pertains to Camissoniopsis micrantha.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Camissoniopsis
Sibling taxa
C. bistorta, C. cheiranthifolia, C. confusa, C. guadalupensis, C. hardhamiae, C. hirtella, C. ignota, C. intermedia, C. lewisii, C. luciae, C. pallida, C. robusta
Synonyms Oenothera micrantha, Camissonia micrantha, Holostigma micranthum, S. micranthum
Name authority (Hornemmann ex Sprengel) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 205. (2007)
Source FNA vol. 10. Treatment author: Warren L. Wagner.
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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