Camissoniopsis micrantha

(Hornemmann ex Sprengel) W. L. Wagner & Hoch

Syst. Bot. Monogr. 83: 205. 2007.

Basionym: Oenothera micrantha Hornemann ex Sprengel Syst. Veg. 2: 228. 1825
Synonyms: Camissonia micrantha (Hornemann ex Sprengel) P. H. Raven Holostigma micranthum (Hornemann ex Sprengel) Spach S. micranthum (Hornemann ex Sprengel) Walpers
Treatment appears in FNA Volume 10.

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-pored 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.


Phenology: Flowering (Jan–)Mar–Jun(–Sep).
Habitat: Coastal strand, coastal sage scrub, chaparral.
Elevation: 0–300(–800) m.

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.

Selected References

None.

Lower Taxa

None.
... more about "Camissoniopsis micrantha"
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Warren L. Wagner +
(Hornemmann ex Sprengel) W. L. Wagner & Hoch +
rounded +  and cuneate +
Oenothera micrantha +
indehiscent +  and loculicidal +
serrulate +, denticulate +  and dentate +
narrowly elliptic-lanceolate +  and lanceolate +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
curved +  and straight +
1.3 cm13 mm <br />0.013 m <br /> (2 cm20 mm <br />0.02 m <br />) +
4-angled +  and subterete +
1-5 times or straight narrowly cylindrical and thickened +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
0–300(–800) m. +
white +  and reddish-brown +
exfoliating +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
basifixed +  and versatile +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
actinomorphic +
not swollen +, 4-angled +, curled +  and contorted +
1-5 times or straight narrowly cylindrical and thickened +
Coastal strand, coastal sage scrub, chaparral. +
deciduous +
1 cm10 mm <br />0.01 m <br /> (12 cm120 mm <br />0.12 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
denticulate +
numerous +  and 1 +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering (Jan–)Mar–Jun(–Sep). +
Syst. Bot. Monogr. +
basal +  and cauline +
clavate +  and globose +
7 +  and numerous +
sculptured +  and smooth +
obovoid +  and flattened +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
purple +, pink +, red +  and green +
deciduous +
0.1 cm1 mm <br />0.001 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
parenchymatous +
parietal +, axile +  and placentation +
unequal +
aquatic +, amphibious +  and terrestrial +
2 times as many or as many as sepals +
15 cm150 mm <br />0.15 m <br /> (60 cm600 mm <br />0.6 m <br />) +
subcapitate +  and subglobose +
petiolate +  and sessile +
intrapetiolar +
pubescent +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
aquatic +, amphibious +  and terrestrial +
non-papillate +
Camissonia micrantha +, Holostigma micranthum +  and S. micranthum +
Camissoniopsis micrantha +
Camissoniopsis +
species +
3(-5)-aperturate +
smooth +  and erose +
papillate +