Eriogonum giganteum var. formosum

K. Brandegee

Erythea 5: 79. 1897.

Common names: San Clemente Island’s St. Catherine’s-lace
Endemic
Synonyms: Eriogonum giganteum subsp. formosum (K. Brandegee) P. H. Raven
Treatment appears in FNA Volume 5. Treatment on page 302. Mentioned on page 301.

Plants 3–15(–25) dm. Aerial flowering stems 2–4 dm, tomentose to glabrate. Leaves: petiole (1–)2–4 cm; blade lanceolate to narrowly oblong, 5–8 × 1–2 cm. Inflorescences open, 10–50 cm wide. Involucres 4–5 mm. Flowers 3–4 mm. Achenes 3–3.5 mm.


Phenology: Flowering May–Sep.
Habitat: Rocky cliffs, slopes, and ridges, coastal scrub communities, oak woodlands
Elevation: 0-300 m

Discussion

Of conservation concern.

Variety formosum is known only from San Clemente Island, Los Angeles County. Extensive sheep grazing and military operations harmed much of the population prior to the 1960s. Reduction of the sheep population and greater concern for the local environment have greatly improved the ecology of the island and prospects for the long-term survival of this species. The variety is cultivated, and established populations occasionally are found on the mainland of southern California.

Selected References

None.

Lower Taxa

None.
James L. Reveal +
K. Brandegee +
Undefined subg. Eucycla +
San Clemente Island’s St. Catherine’s-lace +
0-300 m +
Rocky cliffs, slopes, and ridges, coastal scrub communities, oak woodlands +
Flowering May–Sep. +
Eriogonum giganteum subsp. formosum +
Eriogonum giganteum var. formosum +
Eriogonum giganteum +
variety +