Flora of North America species comparison

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Clematis texensis

Clematis drummondii

crimson clematis, scarlet clematis, scarlet leather flower, Texas clematis

Barbas de chivato, Drummond's clematis, old man's beard
Stems

viny, to 3 m, glabrous or sometimes ± hirsute near nodes.

scrambling to climbing with tendril-like petioles and leaf-rachises, 4-5 m or more.
Leaf

blade 1-pinnate;

leaflets 6-10 plus additional tendril-like terminal leaflet, ovate to nearly round, unlobed, 2-3-lobed, or most proximal occasionally 3-foliolate, 1-9 × 1-6 cm, leathery, ± prominently reticulate adaxially;

surfaces abaxially usually glabrous, occasionally sparsely pubescent, glaucous.

blade odd-pinnate, usually 5-foliolate;

leaflets deltate to ovate, strongly 3-parted to 3-cleft, proximal leaflets sometimes 3-cleft, 1.5-5.5 × 0.5-4.5 cm, membranous to leathery;

segments ovate, deltate, or linear, margins dentate;

surfaces pilose, abaxially more densely so.
Inflorescences

axillary, 1-7-flowered.

usually axillary, 3-12-flowered simple cymes or compound with central axis or flowers solitary or paired.
Flowers

ovoid to urn-shaped;

sepals rose-red to scarlet abaxially and at tip adaxially, ovate-lanceolate, 1.5-3 cm, margins not expanded, thick, not crispate, tomentose, tips acute to acuminate, recurved, abaxially glabrous.

unisexual;

pedicel slender, (1.1-)1.5-7 cm;

sepals wide-spreading, not recurved, white to cream, oblong or elliptic to obovate or oblanceolate, (7-)9-13(-15) mm, abaxially and adaxially pubescent;

stamens 40-90;

filments glabrous;

staminodes 17-35 when present;

pistils 35-90.
Achenes

bodies appressed-pubescent;

beak 4-7 cm, plumose.

elliptic to ovate, 3-5 × l.5-2.5 mm, rimmed, short-silky;

beak 4-9 cm.
2n

= 16.

Clematis texensis

Clematis drummondii
Phenology Flowering spring–summer (Mar–Jun). Flowering spring–fall (Mar–Oct).
Habitat Woodlands, calcareous cliffs, and stream banks Chaparral, xeric scrub, oak scrub, and grasslands, pastures, fencerows, and other secondary sites, often along streams or on slopes
Elevation 80-700 m (300-2300 ft) 0-2200 m (0-7200 ft)
Distribution
from FNA
TX
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; CO; NM; OK; TX; n Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Although widely cultivated because it is the only species of Clematis with truly red flowers, C.texensis is native only to the southeastern part of the Edwards Plateau, Texas.

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

As with many other members of the subgenus, the leaves of Clematis drummondii are reputedly used in a poultice to treat irritations of the skin in humans and other animals.

Clematis coahuilensis D. J. Keil is found in central and north-central Mexico in habitats similar to those of C. drummondii; it is distinguished by ovate, entire to 3-lobed, leathery leaflets.

(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. Clematis
Sibling taxa
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. 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. 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
Synonyms Viorna coccinea C. nervata
Name authority Buckley: Proc. Acad. Nat. Sci. Philadelphia 13: 448. (1862) Torrey & A. Gray: Fl. N. Amer. 1: 7. (1838)
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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