Caulanthus cooperi (Cooper's Jewel-Flower)

 3/1/19 Walker Canyon Trail, Temescal Mountains,

Lake Elsinore, Riverside County, CA

3/1/19 Walker Canyon Trail

3/1/19 Walker Canyon Trail

LIFE LIST NOTES:

COMMON NAME: Cooper's Jewel-Flower

SPECIES: Caulanthus cooperi

FAMILY: Brassicaceae (Mustard Family)

LIFE LIST DATE: 3/1/19

LOCATION: Walker Canyon Trail, Temescal Mountains, Lake Elsinore, Riverside County, CA

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Treatment from Jepson eFlora:

Native

Habit: Annual. 

Stem: 1--8 dm, generally weak, not inflated, generally wavy and branched distally, glabrous or hairs appressed, 2-rayed, minute. 

Leaf: basal 1--8 cm, coarsely dentate to lobed (entire), oblanceolate to spoon-shaped; cauline sessile, lanceolate to oblong, entire to dentate, base lobed to clasping. 

Inflorescence: terminal sterile flower cluster 0. 

Flower: sepals 3--6.5 mm, +- purple or yellow-green; petals 4.5--9 mm, not wavy, +- purple or yellow-green; stamens 4 long, 2 short, filaments free. 

Fruit: spreading to reflexed, 2--6 cm, 1.5--2.5 mm wide, cylindric, generally curved; style 0.2--2.7 mm, stigma +- 2-lobed; pedicel reflexed, 1--4.5 mm. 

Seed: 24--48, 1--2 mm, oblong; cotyledons entire. 

Ecology: Common. Open, sandy, gravelly soil, generally among shrubs; 

Elevation: 300--2500 m. 

Bioregional Distribution: n TR, e PR, s SNE, D; 

Distribution Outside California: to southwestern Utah, western Arizona, Baja California. 

Flowering Time: Mar--Apr 

Jepson eFlora Author: Ihsan A. Al-Shehbaz