Friday, April 8, 2016

Helianthemum scoparium (Common Rock Rose, California Rush Rose)

6/1/03 San Juan Loop Trail, Cleveland National Forest, Riverside County, CA

6/1/03 San Juan Loop Trail


COMMON NAME: Common Rock Rose, California Rush Rose

SPECIES: Helianthemum scoparium

FAMILY: Cistaceae (Rockrose Family)


LOCATION: San Juan Loop Trail, Cleveland National Forest, Riverside County, CA


Treatment from The Jepson Manual (1993):

Stem 12–45 cm

Leaf 5–40 mm, 0.5–6 mm wide, generally linear to narrow-oblanceolate

Flower: outer sepals 0.5–4.5 mm, < 0.5 mm wide, linear; inner sepals 2.5–7 mm, 2–3.5 mm wide, ovate, acuminate; petals 3–11 mm, obovate; stamens 12–45

Fruit 2.5–4 mm, ovoid

Seeds 4–10

Ecology: Dry sandy or rocky soil of hills, slopes, ridges

Elevation: < 1500 m.  

Bioregional distribution: North Coast Ranges, n&c Sierra Nevada Foothills, n High Sierra Nevada, San Joaquin Valley, Central Western California, South Coast, Channel Islands, San Bernardino Mountains, Peninsular Ranges 

Synonyms: H. suffrutescens B. Schreib., Bisbee Peak rush-rose 

Varieties  vulgare Jeps. and  aldersonii (Greene) Munz not recognized. Threatened by mining.

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