Calystegia macrostegia subsp. intermedia

(Abrams) Brummitt

Ann. Missouri Bot. Gard. 52: 214. 1965.

Basionym: Convolvulus aridus subsp. intermedius Abrams Contr. Dudley Herb. 3: 357. 1946
Synonyms: Calystegia macrostegia subsp. longiloba (Abrams) Brummitt Convolvulus aridus subsp. longilobus Abrams
Treatment appears in FNA Volume 14.

Herbage glabrous or puberulent, usually glabrescent. Stems trailing or twining-climbing, to 300 cm. Leaf blades broadly to narrowly triangular, (7–)12–20(–30) mm wide excluding lobes, lobes 2-pointed or rounded, basal sinus usually acute to rounded, sometimes ± quadrate. Bracts lanceolate, (10–)13–20 × 6–10(–12) mm, prox­imally flat or ±keeled, apex acute. Flowers: sepals (9–)11–14(–16) mm; corolla (24–)27–40 mm; stamens (15–)17–21 mm.


Phenology: Flowering Mar–Aug.
Habitat: Dry, stony hillsides.
Elevation: 0–600(–1100) m.

Distribution

Calif., Mexico (Baja California).

Discussion

Subspecies intermedia intergrades with subsp. macrostegia.

Selected References

None.

Lower Taxa

None.
Richard K. Brummitt† +
(Abrams) Brummitt +
Convolvulus aridus subsp. intermedius +
Calif. +  and Mexico (Baja California). +
0–600(–1100) m. +
Dry, stony hillsides. +
Flowering Mar–Aug. +
Ann. Missouri Bot. Gard. +
Calystegia macrostegia subsp. longiloba +  and Convolvulus aridus subsp. longilobus +
Calystegia macrostegia subsp. intermedia +
Calystegia macrostegia +
subspecies +