Monday, March 11, 2019

Lasthenia coronaria (Royal Goldfields)

3/24/17 Dripping Springs Trail, Agua Tibia,
Cleveland National Forest, Riverside County, CA


COMMON NAME: Royal Goldfields

SPECIES: Lasthenia coronaria

FAMILY: Asteraceae (Sunflower Family)


LOCATION: Dripping Springs Trail, Agua Tibia Wilderness, Cleveland National Forest, Riverside County, CA

Treatment from Jepson eFlora:

Habit: Annual < 40 cm; herbage sweet-scented. 

Stem: simple or much-branched; hairs short, glandular, or long, nonglandular, or mixed. 

Leaf: 1.5--6 cm, linear, entire or 1--2-pinnately lobed, generally glandular-hairy. 

Inflorescence: involucre 4--7 mm, hemispheric to obconic; phyllaries 6--14, free, generally glandular-hairy, falling with fruits; receptacle conic, hairy. 

Ray Flower: 6--15; corolla yellow in alkali solution; ray 3--10 mm. 

Disk Flower: many; anther tip elliptic; style tips triangular or dome-shaped. 

Fruit: < 2.5 mm, linear to narrowly club-shaped, hairy, black; pappus generally of 5--6+ lanceolate to ovate scales or 4--5 oblong, truncate scales or 0, generally different in ray and disk fruits. Chromosomes: 2n=8,10.

Ecology: Sunny, open grassy places, uncommon; 

Elevation: < 700 m. 

Bioregional Distribution: SCo, TR, PR, w D; 

Distribution Outside California: northwestern Baja California. 

Flowering Time: Mar--May 

Note:Only Lasthenia sp. with glands that produce a characteristic scent. 

Jepson eFlora Author: Raymund Chan & Robert Ornduff

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