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Calystegia subacaulis subsp. subacaulis


Higher Taxonomy
Family: ConvolvulaceaeView DescriptionDichotomous Key
Common Name: MORNING-GLORY FAMILY
Habit: Annual, perennial herb, subshrub, generally twining or trailing. Leaf: 0 or alternate. Inflorescence: cyme or flowers 1 in axils; bracts subtending flowers 0 or 2. Flower: bisexual, radial; sepals (4)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, each generally 2-ovuled, styles 1--2. Fruit: generally capsule. Seed: 1--4(6).
Genera In Family: 55--60 genera, 1600--1700 species: warm temperate to tropics; some cultivated for food or as ornamental (Ipomoea). Note: Monophyletic only if Cuscutaceae included, as treated here. Ipomoea cairica (L.) Sweet, Ipomoea hederacea Jacq. [Ipomoea nil L., misappl.], Ipomoea indica (Burm.) Merr. (including Ipomoea mutabilis Ker Gawl.), Ipomoea purpurea (L.) Roth, Ipomoea triloba L., all included in TJM (1993), not naturalized.
eFlora Treatment Author: Robert E. Preston, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: CalystegiaView DescriptionDichotomous Key

Common Name: MORNING-GLORY
Habit: Perennial herb, subshrub from caudex or rhizome, glabrous to tomentose. Stem: short to high-climbing, generally twisting, twining. Leaf: generally > 1 cm, linear to reniform or sagittate to hastate (deeply divided). Inflorescence: peduncle generally 1-flowered; bracts generally +- opposite, lobed or not, > 1 mm below calyx, not hiding it, small, to < 1 mm below calyx, hiding it or +- so, large. Flower: generally showy; corolla glabrous, white or yellow to pink or purple; ovary chamber 1, style 1, stigma lobes 2, oblong, tips obtuse. Fruit: +- spheric, +- inflated. Seed: generally +- 4.
Species In Genus: +- 25 species: temperate, worldwide. Etymology: (Greek: hiding calyx, by bracts of some) Note: Intermediates common, often difficult to identify. Molecular evidence indicates close relationship with Convolvulus (Carine et al. 2004 Amer J Bot 91:1070--1085). Bracts qualify as bractlets by some definitions. Leaf blade length measured along midrib.
eFlora Treatment Author: R.K. Brummitt
Reference: Brummitt 2002 Madroño 49:130--131
Unabridged Reference: Brummitt 1980 Kew Bull 35(2):327--328
Species: Calystegia subacaulisView Description 


Habit: Perennial herb from rhizome or woody caudex; +- hairy. Stem: decumbent or ascending, 2--20 cm. Leaf: blade 3--4 cm, +- triangular-hastate, with small backward-directed lobes or not; base tapered; tip acute to rounded. Inflorescence: peduncle < 3.3 cm, < subtending leaf; bracts +- hiding calyx, 7--17 mm, generally +- 4--9 mm wide, widely ovate to lanceolate or oblong. Flower: sepals 10--13 mm; corolla 33--62 mm, white or cream (pink- or purple-tinged).
Note: Subspecies intergrade.
Calystegia subacaulis Hook. & Arn. subsp. subacaulis
NATIVE
Habit: Plant hairs sparse to +- dense, short, spreading to reflexed. Stem: generally +- 2 cm. Leaf: basal rosette > flowers; +- widely rounded to acuminate. Inflorescence: bracts 7--17 mm, 4--9 mm wide, widely ovate to oblong, rounded.
Ecology: Dry, open scrub or woodland; Elevation: < 500 m. Bioregional Distribution: s NCoR, SnFrB. Flowering Time: Apr--Jun Note: Intergrades with Calystegia malacophylla subsp. pedicellata, Calystegia occidentalis subsp. occidentalis.
Synonyms: Convolvulus subacaulis (Hook. & Arn.) Greene; Convolvulus subacaulis var. dolosus Jeps.
Jepson eFlora Author: R.K. Brummitt
Reference: Brummitt 2002 Madroño 49:130--131
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Calystegia subacaulis subsp. subacaulis

botanical illustration including Calystegia subacaulis subsp. subacaulis

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Citation for this treatment: R.K. Brummitt 2012, Calystegia subacaulis subsp. subacaulis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=49576, accessed on December 14, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on December 14, 2019.

Calystegia subacaulis subsp. subacaulis
click for enlargement
© 2014 Neal Kramer
Calystegia subacaulis subsp. subacaulis
click for enlargement
© 2014 Neal Kramer
Calystegia subacaulis subsp. subacaulis
click for enlargement
© 2014 Neal Kramer
Calystegia subacaulis subsp. subacaulis
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© 2011 Vernon Smith
Calystegia subacaulis subsp. subacaulis
click for enlargement
© 2014 Neal Kramer

More photos of Calystegia subacaulis subsp. subacaulis in CalPhotos



Geographic subdivisions for Calystegia subacaulis subsp. subacaulis:
s NCoR, SnFrB.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).





 

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Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.