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12. Calystegia subacaulis Hooker & Arnott, Bot. Beechey Voy. 363. 1839.
[E]
Convolvulus subacaulis (Hooker & Arnott) Greene
Perennials, rhizomatous. Herbage moderately to sparsely hairy, hairs appressed, retrorse, or spreading. Stems ascending-decumbent, to 20–30 cm or almost absent. Leaves in basal rosettes or not; blade rounded-deltate to triangular-hastate, 30–40 mm, base usually cuneate, sometimes lobed, lobes retrorse, 1-pointed or rounded, margins not or weakly undulate, apex acuminate, acute, rounded, or subacute. Bracts immediately subtending sepals, lanceolate, oblong, or broadly ovate, 7–17 × 1.5–9 mm, shorter, or slightly longer, than sepals, proximally usually flat, sometimes keeled, apex usually rounded, sometimes acute. Flowers: sepals 10–13 mm; corolla white or cream, sometimes pink- to purplish-striped or -tinged, 33–62 mm.
Subspecies 2 (2 in the flora): California.
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Herbage moderately to sparsely hairy, hairs retrorse to spreading; stems almost absent or to 2 cm; leaves in basal rosettes, blade apices usually rounded to acuminate, sometimes subacute; bracts (4–)6–9 mm wide |
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12a Calystegia subacaulis subsp. subacaulis |
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Herbage sparsely hairy, hairs appressed; stems ascending-decumbent, to 20–30 cm; leaves not in basal rosettes, blade apices acute; bracts 1.5–4 mm wide |
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12b Calystegia subacaulis subsp. episcopalis |
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Lower Taxa
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