Clematis baldwinii

Torrey & A. Gray

Fl. N. Amer. 1: 8. 1838.

Common names: Pine-woods clematis pine-hyacinth
Endemic
Synonyms: Clematis baldwinii var. latiuscula R. W. Long Viorna baldwinii
Treatment appears in FNA Volume 3.

Stems erect, 2-6 dm, nearly glabrous to moderately pilose. Leaves usually simple. Leaf-blade unlobed or 2-3-lobed, occasionally divided into 3-5 leaflets; leaflet blades or lobes linear to narrowly elliptic-lanceolate, or unlobed leaf-blades elliptic to ovate, 1.5-10 × 0.2-2.5 (-3.5) cm, thin, not prominently reticulate; surfaces glabrous, not glaucous. Inflorescences terminal, flowers solitary; bracts absent or sometimes distal pair of leaves smaller, bractlike. Flowers narrowly bell-shaped; sepals uniformly violet-blue, oblong-lanceolate, 2-5.5 cm, margins narrowly expanded distally to ca. 1 mm wide, thin, crispate, proximally tomentose, glabrous where expanded, distally ± tomentose, tips acuminate, spreading to recurved, abaxially glabrous. Achenes: bodies long-pubescent; beak 6-10 cm, plumose. 2n = 16.


Phenology: Flowering all year.
Habitat: Sandy, flat pine woods
Elevation: 0-50 m

Discussion

The long peduncles (10-30 cm) elevating the flowers well above the leaves are unique to Clematis baldwinii among the simple-leaved species of Clematis subg. Viorna in the flora. Broad-leaved, large-flowered plants have been segregated as C. baldwinii var. latiuscula, but many intermediates connect the extremes, and flower size is not well correlated with leaf shape. As noted by C. S. Keener (1975), leaf shape appears to be uncorrelated with distribution; collections from a single population often include broad- and narrow-leaved plants.

Selected References

None.

Lower Taxa

None.

No values specified."thick" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Clematis baldwinii"
flattened +
James S. Pringle +
Torrey & A. Gray +
cuneate +, truncate +  and cordate +
Undefined subg. Viorna +
curved +  and straight +
variable +
plumose +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
linear;narrowly elliptic-lanceolate or unlobed +
long-pubescent +
bractlike +
smaller +
globose;cylindric +
Pine-woods clematis +  and pine-hyacinth +
bracteate +  and 3-7-flowered +
paired +  and solitary +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0-50 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 +
Sandy, flat pine woods +
axillary +  and terminal +
2-pinnate +  and 1-pinnate +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (10 cm100 mm <br />0.1 m <br />) +
cordate +  and orbiculate oblong lanceolate or oblanceolate lobed or unlobed +
linear +  and narrowly elliptic-lanceolate or unlobed +
linear;narrowly elliptic-lanceolate or unlobed +
palmate +  and pinnate +
tomentose +  and glabrous +
crispate +
expanded +
thin;0mm;1mm +
1-many-flowered +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
distinct +
conspicuous +
reduced +
Flowering all year. +
5 +  and 150 +
Fl. N. Amer. +
not arillate +  and stalked +
violet-blue +
not persistent +
distinct +
abaxially glabrous +  and silky hirsute or tomentose +
3 +  and 6 +
oblong-lanceolate +
2 cm20 mm <br />0.02 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
persistent +
not glaucous;glabrous +
Clematis baldwinii var. latiuscula +  and Viorna baldwinii +
Clematis baldwinii +
Clematis subg. Viorna +
species +
spreading +  and recurved +
acuminate +
annual +  and perennial +