familyConvolvulaceae
genusCalystegia
speciesCalystegia macrostegia
subspeciesCalystegia macrostegia subsp. tenuifolia
Calystegia macrostegia subsp. tenuifolia
Ann. Missouri Bot. Gard. 52: 215. 1965.
Basionym: Convolvulus aridus subsp. tenuifolius Abrams Contr. Dudley Herb. 3: 359. 1946
Treatment appears in FNA Volume 14.
Herbage glabrous or puberulent. Stems trailing or weakly twining-climbing. Leaf blades linear to narrowly triangular, 1–7 mm wide, excluding lobes, basal lobes linear, 2-pointed or rounded, basal sinus rounded to quadrate, apex acute. Bracts narrowly lanceolate, 8–14 × 4–8 mm, proximally flat or ± keeled, apex acute. Flowers: sepals 7–10 mm; corolla white or cream, 22–30(–40) mm; stamens 13–18 mm.
Phenology: Flowering Apr–Sep.
Habitat: Canyons, rocky hillsides, shrubby sites.
Elevation: 0–1400 m.
Distribution
Calif., Mexico (Baja California).
Discussion
Subspecies tenuifolia intergrades with Calystegia longipes and with C. macrostegia subspp. arida and intermedia.
Selected References
None.
Lower Taxa
None.