Clematis coactilis

(Fernald) Keener

J. Elisha Mitchell Sci. Soc. 83: 36. 1967.

Conservation concernEndemic
Basionym: Clematis albicoma var. coactilis Fernald Rhodora 45: 407. 1943
Treatment appears in FNA Volume 3.

Stems erect, not viny, 2-4.5 dm, densely silky, hirsute, or ± tomentose with appressed hairs. Leaves simple. Leaf-blade rarely 1-pinnate, narrowly to broadly ovate, unlobed or sometimes few-lobed, 5-12 × 3-9.5 cm, leathery, ± prominently reticulate adaxially; surfaces abaxially densely silky-tomentose with appressed hairs, not glaucous. Inflorescences terminal, flowers solitary; bracts absent. Flowers broadly urn-shaped; sepals pale-yellow to rarely purple-tinged, lanceolate, 1.9-3.4 cm, margins not expanded or narrowly expanded to 1.7 mm wide, thin, not crispate, tomentose, tips obtuse, spreading, abaxially finely tomentose. Achenes: body pilose, hairs of rim spreading; beak (2.5-) 3-4.5 (-5.5) cm, plumose. 2n = 16.


Phenology: Flowering spring–early summer.
Habitat: Shale barrens, rarely on sandstone, dolomite, or limestone outcrops
Elevation: 300-600 m

Discussion

Of conservation concern.

Clematis coactilis is known only from western Virginia. C. S. Keener (1967, 1975) suggested that this species may be a stabilized derivative of past hybridization between C. albicoma and C. ochroleuca.

In fruit, Clematis coactilis is distinguishable from C. ochroleuca by its combination of spreading to reflexed hairs on the achene rims and whitish to pale yellow (rarely tawny) hairs on the beaks, contrasting with the strongly ascending hairs on the achene rims and tawny (rarely yellowish white) hairs on the beaks of C. ochroleuca. This species and C. ochroleuca lack stomates on the adaxial surface of the leaves, whereas the closely related species C. albicoma, C. fremontii, and C. viticaulis have stomates on both leaf surfaces (C. S. Keener 1967).

Selected References

None.

Lower Taxa

None.

"thick" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Clematis coactilis"
flattened +
James S. Pringle +
(Fernald) Keener +
cuneate +, truncate +  and cordate +
Clematis albicoma var. coactilis +
4.5 cm45 mm <br />0.045 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
curved +  and straight +
variable +
plumose +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
scale-like;leaflike +
globose;cylindric +
bracteate +  and 3-7-flowered +
paired +  and solitary +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
300-600 m +
filiform +  and flattened +
bracteate +  and 3-7-flowered +
paired +  and solitary +
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 +
Shale barrens, rarely on sandstone, dolomite, or limestone outcrops +
axillary +  and terminal +
2-pinnate +  and 1-pinnate +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
3 cm30 mm <br />0.03 m <br /> (9.5 cm95 mm <br />0.095 m <br />) +
cordate +  and orbiculate oblong lanceolate or oblanceolate lobed or unlobed +
cordate +  and orbiculate oblong lanceolate or oblanceolate lobed or unlobed +
palmate +  and pinnate +
not crispate +
expanded +  and not expanded +
thin;wide +
1-many-flowered +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
distinct +
conspicuous +
reduced +
Flowering spring–early summer. +
5 +  and 150 +
J. Elisha Mitchell Sci. Soc. +
not arillate +  and stalked +
pale-yellow;rarely purple-tinged +
not persistent +
distinct +
abaxially glabrous +  and silky hirsute or tomentose +
3 +  and 6 +
lanceolate +
1.9 cm19 mm <br />0.019 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
Conservation concern +  and Endemic +
persistent +
not glaucous;silky-tomentose +
Clematis coactilis +
Clematis subg. Viorna +
species +
tomentose +
obtuse +
annual +  and perennial +