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Hill morning glory, hillside false bindweed

lucky false bindweed, lucky morning-glory

Habit Perennials, rhizomatous. Perennials, rhizomatous.
Herbage

moderately to sparsely hairy, hairs appressed, retrorse, or spreading.

glabrous or sparsely hairy.

Stems

ascending-decumbent, to 20–30 cm or almost absent.

trailing or twining-climbing.

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.

blade oblong, oblong-ovate, orbiculate, or ovate, 45–122 × 30–96 mm, base cordate and lobes rounded or base cuneate to ± truncate.

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.

(1–)2–3(–4) mm distant from sepals, narrowly elliptic to oblanceolate, 5–14 × 1–2.5(–3.5) mm, shorter than or equal to sepals, proximally flat, margins entire.

Flowers

sepals 10–13 mm;

corolla white or cream, sometimes pink- to purplish-striped or -tinged, 33–62 mm.

sepals lance-ovate to narrowly oblong, outers 8–11 × 2.5–5 mm, inners 11–15 × 3.5–4 mm;

corolla white with yellow or purplish stripes, 27–45 mm.

Calystegia subacaulis

Calystegia felix

Phenology Flowering Mar–Sep.
Habitat Poorly drained alkali silt loams, disturbed sites.
Elevation 10–300 m. (0–1000 ft.)
Distribution
from USDA
California
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
Discussion

Subspecies 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
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
Source FNA vol. 14. FNA vol. 14.
Parent taxa Convolvulaceae > Calystegia Convolvulaceae > Calystegia
Sibling taxa
C. atriplicifolia, C. catesbeiana, C. collina, C. felix, C. hederacea, C. longipes, C. macounii, C. macrostegia, C. malacophylla, C. occidentalis, C. peirsonii, C. pubescens, C. purpurata, C. sepium, C. silvatica, C. soldanella, C. spithamaea, C. stebbinsii, C. vanzuukiae
C. atriplicifolia, C. catesbeiana, C. collina, C. hederacea, C. longipes, C. macounii, C. macrostegia, C. malacophylla, C. occidentalis, C. peirsonii, C. pubescens, C. purpurata, C. sepium, C. silvatica, C. soldanella, C. spithamaea, C. stebbinsii, C. subacaulis, C. vanzuukiae
Subordinate taxa
C. subacaulis subsp. episcopalis, C. subacaulis subsp. subacaulis
Synonyms Convolvulus subacaulis
Name authority Hooker & Arnott: Bot. Beechey Voy. 363. (1839) Provance & A. C. Sanders: PhytoKeys 32: 5, figs. 1–3. (2013)
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