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10. Calystegia collina (Greene) Brummitt, Ann. Missouri Bot. Gard. 52: 215. 1965.
[E]
Convolvulus collinus Greene, Pittonia 3: 326. 1898; C. malacophyllus Greene subsp. collinus (Greene) Abrams
Perennials, rhizomatous. Herbage tomentellous, tomentose, or villous. Stems ascending-decumbent, to 50 cm, sometimes almost absent. Leaves in basal rosettes; blade usually triangular, sometimes notably 3-lobed, to 40 mm, base ± lobed, lobes oblong to triangular, 1–3-pointed, margins ± undulate or not, apex rounded to acute. Bracts immediately subtending sepals, lanceolate, linear-elliptic, or ovate, 5–17 × 1.5–14 mm. Flowers: sepals 8–13 mm; corolla white, (25–)27–50(–55) mm.
Subspecies 5 (5 in the flora): California.
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| 1 |
Leaf blades notably 3-lobed, lobes oblong to triangular, margins not notably undulate; bracts 1.5–3.5 mm wide |
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10b Calystegia collina subsp. tridactylosa |
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Leaf blades triangular, usually basally lobed and lobes 1–3-pointed, weakly lobed in subsp. collina, margins undulate or not; bracts 4–14 mm wide. |
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(2) |
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| 2 (1) |
Sepals glabrous or medially strigose. |
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(3) |
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Sepals, at least outers, hairy, hairs appressed. |
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(4) |
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| 3 (2) |
Leaf blades ± triangular, base weakly lobed, lobes seldom well developed, apex rounded to subacute |
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10a Calystegia collina subsp. collina |
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Leaf blades broadly triangular, basal lobes well developed, apex acute |
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10e Calystegia collina subsp. oxyphylla |
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| 4 (2) |
Leaf blades mostly 40 × 40 mm, margins not undulate |
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10c Calystegia collina subsp. apicum |
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Leaf blades mostly 10–20 × 10–20 mm, margins undulate |
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10d Calystegia collina subsp. venusta |
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Lower Taxa
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