Clematis tangutica var. tangutica

IllustratedIntroduced
Treatment appears in FNA Volume 3.

Stems climbing, 2-4 m. Leaf-blade pinnately 5-7-foliolate, proximal leaflets rarely 3-foliolate; leaflets lanceolate to oblong or elliptic, unlobed or lobed proximally, 1.8-5.7 × 0.4-1.6 cm, margins serrate; surfaces usually abaxially pubescent, not glaucous. Inflorescences terminal and axillary, 1 (-3) -flowered. Flowers bisexual; pedicel 0.6-3 cm; sepals ascending, scarcely spreading except near tip (forming narrowly bell-shaped perianth), bright-yellow, lanceolate to elliptic, 1.8-3.4 cm, length ca. 2.5 times width, margins silky-pubescent, abaxially silky-pubescent, adaxially glabrous; stamens 20-50; filaments pilose proximally; staminodes absent; pistils 80-150. Achenes turgid, not conspicuously rimmed, pilose; beak 2-4.5 cm. 2n = 16.


Phenology: Flowering summer–early fall.
Habitat: Roadsides, thickets, other ± open, disturbed sites
Elevation: 700-1000 m

Distribution

V3 868-distribution-map.gif

Introduced; Alta., B.C., Man., Sask., Yukon, native to Asia (China), native to Asia (India)

Discussion

Clematis tangutica var. tangutica, the most commonly cultivated yellow-flowered species of Clematis, should probably be expected elsewhere. It is closely related to, and sometimes treated as a variety of, C. orientalis.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

James S. Pringle +
(Maximowicz) Korshinsky +
cuneate +, truncate +  and cordate +
Clematis orientalis var. tangutica +
curved +  and straight +
plumose +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
scale-like;leaflike +
globose;cylindric +
paired +  and solitary +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Alta. +, B.C. +, Man. +, Sask. +, Yukon +, native to Asia (China) +  and native to Asia (India) +
700-1000 m +
staminate +, pistillate +  and bracteate +
paired +  and solitary +
nodding +  and not nodding +
showy +  and inconspicuous +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
sessile +  and aggregate +
flattened-ellipsoid;terete;flattened-ellipsoid;terete;lenticular +
Roadsides, thickets, other ± open, disturbed sites +
petiolate +, sessile +, compound +  and simple +
cordate +  and orbiculate oblong lanceolate or oblanceolate lobed or unlobed +
1.8 cm18 mm <br />0.018 m <br /> (5.7 cm57 mm <br />0.057 m <br />) +
lanceolate +  and oblong or elliptic unlobed or lobed +
0.4 cm4 mm <br />0.004 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
palmate +  and pinnate +
glabrous +  and silky-pubescent +
toothed;entire +
paired +  and solitary +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (3 cm30 mm <br />0.03 m <br />) +
distinct +
conspicuous +
spurred +, funnel--shaped +, cup-shaped +  and plane +
reduced +
Flowering summer–early fall. +
rudimentary +
80 +  and 150 +
Izv. Imp. Akad. Nauk, ser. +
not arillate +  and stalked +
not connivent +
bright-yellow +
not persistent +
distinct +
spreading +  and ascending +
3 +  and 6 +
lanceolate +  and elliptic +
1.8 cm18 mm <br />0.018 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
Illustrated +  and Introduced +
yellow-flowered +
200 cm2,000 mm <br />2 m <br /> (400 cm4,000 mm <br />4 m <br />) +
persistent +
not glaucous;pubescent +
Clematis tangutica var. tangutica +
Clematis tangutica +
variety +
annual +  and perennial +