Tuesday, April 2, 2019

Caulanthus lasiophyllus (California Mustard)

 3/23/19 Harford Springs Reserve, Gavilan Hills,
Riverside County, CA

3/23/19 Harford Springs Reserve


COMMON NAME: California Mustard

SPECIES: Caulanthus lasiophylla

FAMILY: Brassicaceae (Mustard Family)


LOCATION: Harford Springs Reserve, Gavilan Hills, Riverside County, CA

Treatment from Jepson eFlora:

Habit: Annual, sparsely to densely stiff-hairy. 

Stem: erect, (0.8)2--10(16) dm, not inflated, simple or branched. 

Leaf: basal lanceolate to oblong or oblanceolate, pinnately lobed to dentate; distal cauline short petioled, smaller, base not lobed. 

Inflorescence: elongated; terminal sterile flower cluster 0. 

Flower: calyx cylindric, sepals erect, 2--4 mm, generally green; petals 2.5--5(6.5) mm, white to creamy white or +- pink, not channeled, margin not wavy; stamens 4 long, 2 short. 

Fruit: erect to reflexed, 2--4.8(5.7) cm, 0.7--1.2 mm wide, straight to outcurved; style 0.5--2 mm, stigma +- entire; pedicel strongly reflexed to spreading, (0.7)1--2.2(3) mm. 

Seed: 14--60, 0.9--1.5 mm, oblong.

Ecology: Common. Desert flats, sandy banks, gravelly or rocky areas, talus slopes, shrubland, grassy fields, disturbed sites; 

Elevation: < 1400 m. 

Bioregional Distribution: CA (exc MP); 

Distribution Outside California: to British Columbia, Utah, northwestern Mexico. 

Flowering Time: Mar--Jun 

Jepson eFlora Author: Ihsan A. Al-Shehbaz

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