Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

CONVOLVULACEAE

MORNING-GLORY FAMILY

Lauramay T. Dempster (except Calystegia)

Perennial (annual), generally twining or trailing
Leaves alternate
Inflorescence: cyme or flowers solitary in axils; pedicels often with 2 bracts
Flower bisexual, radial; sepals 5, ± free, overlapping, persistent, often unequal; corolla generally showy, generally bell-shaped, ± shallowly 5-lobed, generally pleated and twisted in bud; stamens 5, epipetalous; pistil 1, ovary superior, chambers generally 2, ovules generally 2 per chamber, styles 1–2
Fruit: generally capsule
Seeds 1–4(6)
Genera in family: 50 genera, 1,000 species: warm temp to tropical; some cultivated as ornamental
Recent taxonomic note: Recently treated to include Cuscutaceae [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553].
(Family description, key to genera by L.T. Dempster)

CALYSTEGIA

MORNING-GLORY

Richard K. Brummitt

Perennial, subshrub from caudex or rhizome, glabrous to tomentose
Stem very short to high-climbing, generally twisting and twining
Leaf generally > 1 cm, linear to reniform, often sagittate to hastate, rarely deeply divided
Inflorescence: peduncle generally 1-flowered; bractlets small and remote from calyx to large and concealing calyx, sometimes lobed
Flower generally showy; corolla glabrous, white or yellow to pink or purple; ovary chamber 1 (septa generally incomplete), stigma lobes 2, generally swollen, cylindric or oblong, ± flattened
Fruit ± spheric, ± inflated
Seeds generally ± 4
Species in genus: ± 25 species: temp, worldwide
Etymology: (Greek: concealing calyx, from bractlets of some)
Reference: [Brummitt 1980 Kew Bull 35(2):327–328]
Intergradation common; intermediate forms often difficult to identify. Appears similar to Convolvulus , but anatomy suggests that the 2 genera are not very closely related.

Native

C. subacaulis Hook. & Arn.

Perennial from rhizome or woody caudex; ± hairy
Stem decumbent or ascending, 2–20 cm
Leaf: blade 3–4 cm at midrib, ± triangular-hastate, sometimes with small backwardly directed lobes; tip acute to rounded; base tapered
Inflorescence: peduncle < 3.3 cm, < subtending leaf; bractlets attached just below calyx and ± concealing it, 7–17 mm, 4–9 mm wide, widely ovate to lanceolate or oblong
Flower: sepals 10–13 mm; corolla 33–62 mm, white or cream, often purple-tinged along midveins
Ecology: Dry, open scrub or woodland
Elevation: < 500 m.
Bioregional distribution: s North Coast Ranges, San Francisco Bay Area, c Outer South Coast Ranges
Synonyms: Convolvulus s. (Hook. & Arn.) Greene
Sspp. intergrade.

Native

subsp. episcopalis Brummitt

SAN LUIS OBISPO COUNTY MORNING-GLORY

Plant hairs sparse or appressed, inconspicuous
Stem decumbent to ascending, ± 20 cm,
Leaf: basal rosette 0; blade ± narrowly triangular-hastate, acute
Inflorescence: bractlets generally ± 12 mm, generally ± 4 mm wide, lanceolate, acute
Ecology: UNCOMMON. Habitat of sp.
Bioregional distribution: c Outer South Coast Ranges (San Luis Obispo Co.)
Horticultural information: TRY.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for CALYSTEGIA%20subacaulis%20subsp.%20episcopalis being generated
 


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