Calystegia subacaulis
Calystegia macrostegia
Hill morning glory, hillside false bindweed
island false bindweed, island morning glory
moderately to sparsely hairy, hairs appressed, retrorse, or spreading.
glabrescent, glabrous, or ± hairy, including puberulent and/or pubescent.
ascending-decumbent, to 20–30 cm or almost absent.
prostrate, weakly trailing, or twining-climbing, to 100 cm, or strongly twining-climbing, to 900+ cm.
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.
blade linear or broadly to narrowly triangular, to 130 × 1–120 mm, basally lobed, lobes 2–3-pointed or rounded, basal sinus acute, rounded, or ± quadrate.
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.
immediately subtending sepals, lanceolate to ovate or suborbiculate, (6–)8–30(–37) × 4–30 mm, proximally flat, keeled, or saccate.
sepals 10–13 mm;
corolla white or cream, sometimes pink- to purplish-striped or -tinged, 33–62 mm.
sepals 7–25 mm;
corolla white or cream, sometimes fading pink to purplish, 22–68 mm.
Calystegia subacaulis
Calystegia macrostegia
Subspecies 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Subspecies 6 (6 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. 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. | subsp. subacaulis |
1. 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. | subsp. episcopalis |
1. Bracts 16–30 mm wide, proximally keeled or saccate. | → 2 |
2. Bracts 13–23(–26); sepals 10–17(–22) mm; corollas 36–55(–60) mm; stamens 17–26 mm. | subsp. macrostegia |
2. Bracts (19–)22–30(–37); sepals 16–25 mm; corollas 47–68 mm; stamens 23–32 mm. | subsp. amplissima |
1. Bracts 4–16 mm wide, proximally flat, keeled, or ± saccate. | → 3 |
3. Bract apices acuminate, emarginate, or obtuse. | subsp. cyclostegia |
3. Bract apices acute. | → 4 |
4. Herbage ± grayish pubescent. | subsp. arida |
4. Herbage glabrous or puberulent, usually glabrescent. | → 5 |
5. Leaf blades broadly to narrowly triangular, (7–)12–20(–30) mm wide excluding lobes. | subsp. intermedia |
5. Leaf blades linear to narrowly triangular, 1–7 mm wide excluding lobes. | subsp. tenuifolia |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
