Flora of North America species comparison

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Clematis baldwinii

Clematis viticella

pine-hyacinth, pine-woods clematis

Italian leather flower
Stems

erect, 2-6 dm, nearly glabrous to moderately pilose.

Leaves

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.

sepals 4, blue to violet or rose-violet, 1.5-4 cm, length ca. 1.2-2 times width, abaxially pubescent;

stamens green;

beak glabrous.
Achenes

bodies long-pubescent;

beak 6-10 cm, plumose.

Vines

2-4(-6) m. Leaf blade: leaflets 3-7, proximal leaflets sometimes 3-foliolate, lanceolate to broadly ovate or elliptic, unlobed or 1-3-lobed, 1.5-7 cm, somewhat leathery, margins entire.
2n

= 16.

Clematis baldwinii

Clematis viticella
Phenology Flowering all year. Flowering summer–fall.
Habitat Sandy, flat pine woods Roadsides, thickets and other secondary habitats
Elevation 0-50 m (0-200 ft) 200 m (700 ft)
Distribution
from FNA
FL
[WildflowerSearch map]
[BONAP county map]
from FNA
ON; native to Europe [Introduced in North America]
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Clematis viticella has also been reported from Quebec, New York, and Tennessee, but the reports have not been verified. It probably should be expected elsewhere.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 3. FNA vol. 3.
Parent taxa Ranunculaceae > Clematis > subg. Viorna Ranunculaceae > Clematis > subg. Viticella
Sibling taxa
C. addisonii, C. albicoma, C. bigelovii, C. catesbyana, C. coactilis, C. columbiana, C. crispa, C. drummondii, C. fremontii, C. glaucophylla, C. hirsutissima, C. lasiantha, C. ligusticifolia, C. morefieldii, C. occidentalis, C. ochroleuca, C. orientalis, C. pauciflora, C. pitcheri, C. recta, C. reticulata, C. socialis, C. tangutica, C. terniflora, C. texensis, C. versicolor, C. viorna, C. virginiana, C. vitalba, C. viticaulis, C. viticella
C. addisonii, C. albicoma, C. baldwinii, C. bigelovii, C. catesbyana, C. coactilis, C. columbiana, C. crispa, C. drummondii, C. fremontii, C. glaucophylla, C. hirsutissima, C. lasiantha, C. ligusticifolia, C. morefieldii, C. occidentalis, C. ochroleuca, C. orientalis, C. pauciflora, C. pitcheri, C. recta, C. reticulata, C. socialis, C. tangutica, C. terniflora, C. texensis, C. versicolor, C. viorna, C. virginiana, C. vitalba, C. viticaulis
Synonyms C. baldwinii var. latiuscula, Viorna baldwinii Viticella viticella
Name authority Torrey & A. Gray: Fl. N. Amer. 1: 8. (1838) Linnaeus: Sp. Pl. 1: 543. (1753)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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