Cordylanthus rigidus subsp. littoralis

(Ferris) T. I. Chuang & Heckard

Syst. Bot. Monogr. 10: 42. 1986.

EndemicConservation concern
Basionym: Adenostegia littoralis Ferris Bull. Torrey Bot. Club 45: 413, plate 10, fig. 13, plate 12, fig. 1. 1918
Synonyms: Cordylanthus littoralis (Ferris) J. F. Macbride C. rigidus var. littoralis (Ferris) Jepson
Treatment appears in FNA Volume 17. Treatment on page 676. Mentioned on page 675.

Stems downy to puberulent, hairs soft. Spikes 5–8-flowered; proximal bracts 15–20 mm, equal to or longer than flowers, midlobes green or red distally, lanceolate, 1.5–2.5 mm wide, apex acute to retuse. Flowers: corolla 15–20 mm.


Phenology: Flowering Jul–Sep.
Habitat: Dunes.
Elevation: 0–200 m.

Discussion

Subspecies littoralis grows only in the coastal dunes of the central coast in Monterey and Santa Barbara counties. It intergrades with subsp. rigidus. It is not known if this subspecies is genetically distinct or if its distinguishing features are caused by the unusual habitat where the plants grow.

Selected References

None.

Lower Taxa

None.
Kerry A. Barringer +
(Ferris) T. I. Chuang & Heckard +
Adenostegia littoralis +
0–200 m. +
Dunes. +
Flowering Jul–Sep. +
Syst. Bot. Monogr. +
Endemic +  and Conservation concern +
Cordylanthus littoralis +  and C. rigidus var. littoralis +
Cordylanthus rigidus subsp. littoralis +
Cordylanthus rigidus +
subspecies +