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Shockley's evening-primrose

Habit Herbs annual, glandular puberulent throughout, or glabrate and glaucous distally. Herbs annual, glandular pubescent throughout.
Stems

several, 10–100 cm.

several, 10–200 cm.

Leaves

primarily in poorly defined basal rosette, cauline greatly reduced when present;

petiole 0.4–8 cm;

blade unlobed, ovate to cordate, 2–11.5 × 1.4–5 cm, margins sinuate-dentate, brown oil cells prominently lining veins abaxially.

in poorly defined basal rosette and cauline;

petiole 1.8–5.5 cm;

blade unlobed, broadly cordate to ovate, 2.4–8 × 7 cm, margins sinuate-dentate, yellowish oil cells prominently lining veins abaxially.

Racemes

erect, elongating in anthesis.

erect, elongating in flower.

Flowers

opening at sunrise;

buds without free tips;

floral tube 2–5 mm, villous inside;

sepals 1.5–3.5 mm;

petals lavender, paler and often with flecks toward base, often yellow at very base, fading darker lavender, 2–6 mm;

stamens unequal, filaments of antisepalous ones 1.8–3 mm, of antipetalous ones 1–2.5 mm, anthers 0.6–1 mm, glabrous or sparsely ciliate;

style 4–7 mm, stigma surrounded by anthers at anthesis.

opening at sunrise;

buds without free tips;

floral tube 4–9 mm, with matted, villous hairs inside;

sepals 4.5–9 mm;

petals pale to dark lavender, diffusely purplish-flecked near base, white at very base, fading darker lavender, 9–14 mm;

stamens unequal, filaments of antisepalous stamens 6–12 mm, of antipetalous ones 3.5–8 mm, anthers 2 mm, glabrous;

style 14–22.5 mm, stigma exserted beyond anthers at anthesis.

Capsules

erect, clavate, 7–13 mm;

pedicel 2–5 mm.

erect or ascending, clavate, 8–14 mm;

pedicel 2–3.5 mm.

Seeds

1–1.2 mm.

1–1.3 mm.

2n

= 14.

= 14.

Chylismia heterochroma

Chylismia megalantha

Phenology Flowering May–Jun. Flowering Jun–Oct.
Habitat Alluvial and rocky slopes. Rubble derived from volcanic tuff, partly on moist soil along springs.
Elevation 600–2200 m. (2000–7200 ft.) 1200–1400 m. (3900–4600 ft.)
Distribution
from FNA
CA; NV
[WildflowerSearch map]
[BONAP county map]
from FNA
NV
[BONAP county map]
Discussion

Chylismia heterochroma is known from Churchill and Lander counties, Nevada, south to Lincoln and southern Nye counties, Nevada, to adjacent California (Mono Lake, Mono County, and central Inyo counties). P. H. Raven (1962, 1969) determined this species to be self-compatible and autogamous.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Chylismia megalantha is known from around Frenchman Drainage to French Peak and Skull Mountain in southern Nye County. P. H. Raven (1962, 1969) determined this species to be self-compatible, but outcrossing.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Chylismia Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Chylismia
Sibling taxa
C. arenaria, C. atwoodii, C. brevipes, C. cardiophylla, C. claviformis, C. confertiflora, C. eastwoodiae, C. exilis, C. megalantha, C. multijuga, C. munzii, C. parryi, C. scapoidea, C. specicola, C. walkeri
C. arenaria, C. atwoodii, C. brevipes, C. cardiophylla, C. claviformis, C. confertiflora, C. eastwoodiae, C. exilis, C. heterochroma, C. multijuga, C. munzii, C. parryi, C. scapoidea, C. specicola, C. walkeri
Synonyms Oenothera heterochromas., Camissonia heterochroma, C. heterochroma var. monoensis, O. heterochroma subsp. monoensis, O. heterochroma var. monoensis Oenothera heterochromas. var. megalantha, Camissonia megalantha, O. megalantha
Name authority (S. Watson) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma) (Munz) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 207. (2007)
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