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Clematis occidentalis (Hornem.) Dc.

Western blue virginsbower (en)

Species

Angiosperms > Ranunculales > Ranunculaceae > Clematis

Characteristics

Subglabrous trailer or climber, to 2 m; lfls 3, long-stalked, ovate, entire to crenate or lobed; fls solitary, mostly axillary; sep reddish-violet, lance-ovate, 3–5 cm, softly villous; outer filaments progressively broader and with smaller anthers; the outermost often completely sterile and prominently veined; achenes villous, in a dense, globular head; mature styles flexuous, plumose, 3–5 cm; 2n=16. Rocky woods; e. Que. to Man., s. to N.J., Del., O., nw. Ill., and ne. Io., and in the mts. to N.C. May, June. (C. verticillaris; Atragene americana)
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Stems viny, climbing or trailing (plants scarcely viny perennials in var. dissecta ). Leaf blade 1-ternate (or terminal leaflet sometimes ternate in var. dissecta ), ± firm but not succulent; leaflets lance-ovate to triangular or suborbiculate, lobed or unlobed, margins entire or toothed. Flowers: sepals violet-blue, reddish violet, or white, lanceolate to ovate or elliptic-oblong.
Life form perennial
Growth form vine
Growth support climber
Foliage retention evergreen
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.2 - 3.5
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 4-9
Soil humidity 3-5
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses medicinal
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 43 - 163
Germination temperacture (C°) 12 - 13
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Flower

Clematis occidentalis flower picture by Lise Gingras (cc-by-sa)
Clematis occidentalis flower picture by Larry Medaglia (cc-by-sa)

Distribution

Clematis occidentalis world distribution map, present in Canada and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:1190476-2
WFO ID wfo-0000610362
COL ID VY9G
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Atragene americana Clematis verticillaris Atragene occidentalis Clematis alpina subsp. occidentalis Clematis verticillaris var. cacuminis Clematis verticillaris var. grandiflora Clematis alpina var. occidentalis Clematis alpina var. verticillaris Clematis occidentalis

Lower taxons

Clematis occidentalis var. grosseserrata
WorldFloraDB 2024