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Calystegia collina subsp. tridactylosa
THREE-FINGERED MORNING-GLORY


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.
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 collinaView Description 


Habit: Perennial herb from rhizome, tomentose. Stem: decumbent, not or weakly climbing. Leaf: generally < 3 cm, reniform (basal lobes indistinct) to distinctly lobed; margin generally wavy. Inflorescence: peduncle < 6 cm, > subtending leaf or not; bracts partly to entirely hiding calyx, entire. Flower: sepals 8--13 mm; corolla 25--55 mm, white.

Calystegia collina (Greene) Brummitt subsp. tridactylosa (Eastw.) Brummitt
NATIVE
Stem: generally 15--30 cm. Leaf: lobes distinct; margin +- wavy. Inflorescence: bracts not fully hiding calyx, 7--10 mm, 2--3.5 mm wide, linear-elliptic to lanceolate. Flower: outer sepals tomentose; corolla 27--33 mm.
Ecology: Open grassy or rocky places or in open oak/pine woodland, often serpentine; Elevation: < 600 m. Bioregional Distribution: NCoRO, NCoRI (Mendocino, Lake cos.). Flowering Time: Apr--Jun Note: May intergrade with Calystegia occidentalis subsp. occidentalis, Calystegia malacophylla subsp. malacophylla.
Synonyms: Convolvulus tridactylosa Eastw.
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)
Listed on CNPS Rare Plant Inventory

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Botanical illustration including Calystegia collina subsp. tridactylosa

botanical illustration including Calystegia collina subsp. tridactylosa

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Citation for this treatment: R.K. Brummitt 2012, Calystegia collina subsp. tridactylosa, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=49543, accessed on April 16, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 16, 2024.

Calystegia collina subsp. tridactylosa
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©2011 Vernon Smith

More photos of Calystegia collina subsp. tridactylosa
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Geographic subdivisions for Calystegia collina subsp. tridactylosa:
NCoRO, NCoRI (Mendocino, Lake cos.).
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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).





 

Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
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.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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 (fruiting time in some monocot genera).