The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Shockley's evening-primrose

golden suncup, Mojave suncup, yellow cups

Habit Herbs annual, glandular puberulent throughout, or glabrate and glaucous distally. Herbs annual, moderately to densely villous, sometimes strigillose.
Stems

several, 10–100 cm.

branched, 3–75 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.

primarily in basal rosette, cauline greatly reduced when present, 6–14 × 1.5–3.5 cm;

petiole 1.5–4(–11) cm;

blade pinnately lobed or lateral lobes greatly reduced or absent, often mixed on same plant, terminal lobe usually ovate, rarely elliptic, 2.5–6.9 × 1.5–7 cm, margins irregularly dentate, oil cells on abaxial surface inconspicuous.

Racemes

erect, elongating in anthesis.

nodding, mostly elongating after flowers.

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 sometimes individually reflexed, without free tips or with subapical free tips 1–2 mm, or with minute, apical free tips less than 1 mm;

floral tube 3–8 mm, densely short-villous inside proximally;

sepals 5–9 mm;

petals bright yellow, sometimes with red dots at base, fading yellow to orange or reddish, 3–18 mm;

stamens subequal, filaments 3–6 mm, anthers 2.5–6 mm, ciliate;

style 10–18 mm, stigma exserted beyond anthers at anthesis.

Capsules

erect, clavate, 7–13 mm;

pedicel 2–5 mm.

ascending or spreading, oblong-cylindrical, 18–92 mm;

pedicel 2–20 mm.

Seeds

1–1.2 mm.

1–1.5 mm.

2n

= 14.

Chylismia heterochroma

Chylismia brevipes

Phenology Flowering May–Jun.
Habitat Alluvial and rocky slopes.
Elevation 600–2200 m. (2000–7200 ft.)
Distribution
from FNA
CA; NV
[WildflowerSearch map]
[BONAP county map]
sw United States
[WildflowerSearch map]
[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.)

Subspecies 3 (3 in the flora).

P. H. Raven (1962, 1969) determined this species to be self-incompatible.

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

Key
1. Flower buds individually reflexed; petals often fading reddish, 3–8 mm.
subsp. arizonica
1. Flower buds not individually reflexed; petals fading yellow to orange, 6–18 mm.
→ 2
2. Plants stout, villous; buds with subapical free tips 1–2 mm; petals usually without red dots at base.
subsp. brevipes
2. Plants slender, usually strigillose, sometimes also villous proximally; buds with apical free tips 0–1 mm; petals often with red dots near base.
subsp. pallidula
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. cardiophylla, C. claviformis, C. confertiflora, C. eastwoodiae, C. exilis, C. heterochroma, C. megalantha, C. multijuga, C. munzii, C. parryi, C. scapoidea, C. specicola, C. walkeri
Subordinate taxa
C. brevipes subsp. arizonica, C. brevipes subsp. brevipes, C. brevipes subsp. pallidula
Synonyms Oenothera heterochromas., Camissonia heterochroma, C. heterochroma var. monoensis, O. heterochroma subsp. monoensis, O. heterochroma var. monoensis Oenothera brevipes, Camissonia brevipes
Name authority (S. Watson) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma) (A. Gray) Small: Bull. Torrey Bot. Club 23: 194. (1896) — (as Chylisma)
Web links