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Douglas' clematis, hairy clematis, leatherflower, sugar bowls, vaseflower

clematis, clématite, leather flower, sugarbowls, virgin's bower

Stems

erect, not viny, 1.5-6.5 dm, hirsute (sometimes sparsely so in var. hirsutissima) or densely short, soft-pubescent to nearly glabrous.

Leaves

blade 2-3-pinnate;

leaflets often deeply 2-several-lobed, if lobed than lateral lobes usually small and distinctly narrower than central portion, leaflets or lobes linear to lanceolate, 1-6 × 0.05-1.5 cm, thin, not prominently reticulate;

surfaces sparsely to densely silky-hirsute, not glaucous.

blade undivided or 1-3-pinnately or -ternately compound;

leaf or leaflets cordate to orbiculate, oblong, lanceolate, or oblanceolate, lobed or unlobed, margins entire or toothed.

Inflorescences

terminal, flowers solitary.

axillary and/or terminal, 1-many-flowered cymes or panicles or flowers solitary or in fascicles, to 15 cm;

bracts present and leaflike or ± scalelike or absent, not forming involucre.

Flowers

broadly cylindric to urn-shaped;

sepals very dark violet-blue or rarely pink or white, oblong-lanceolate, 2.5-4.5 cm, margins narrowly expanded distally, 0.5-2 mm wide, thin, distally ± crisped, tomentose, tips obtuse to acute, slightly spreading, abaxially usually densely hirsute, occasionally moderately so.

bisexual or unisexual, radially symmetric;

sepals not persistent in fruit, 4, white, blue, violet, red, yellow, or greenish, plane, ovate to obovate or linear, 6-60 mm;

petals absent;

sometimes anther-bearing staminodes between sepals and stamens;

stamens many;

filaments filiform to flattened;

pistils 5-150, simple;

ovule 1 per pistil;

beak present.

Fruits

achenes, aggregate, sessile, lenticular, nearly terete, or flattened-ellipsoid, sides not prominently veined;

beak terminal, straight or curved, 12-110 mm.

Achenes

bodies densely long-pubescent;

beak 4-9 cm, plumose.

Vines

, ± woody, sometimes only at base, climbing by means of tendril-like petioles and leaf rachises, or erect, herbaceous perennials, from elongate rhizomes.

x

= 8.

Clematis hirsutissima

Clematis

Distribution
from FNA
AZ; CO; ID; MT; NE; NM; OK; OR; SD; UT; WA; WY
[WildflowerSearch map]
[BONAP county map]
from USDA
Worldwide; mostly temperate; a few subarctic; subalpine; or tropical
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

The varieties of Clematis hirsutissima, although highly dissimilar in their extreme forms, intergrade extensively in Wyoming, Colorado, and Utah.

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

Species ca. 300 (32 in the flora).

Clematis is highly diverse in vegetative and floral aspects and has been divided into three or more genera by some authors, the groups segregated in some literature being Clematis subg. Atragene as the genus Atragene and Clematis subg. Viticella as the genus Viticella. Species in Clematis subg. Viorna have been crossed with highly dissimilar species in Clematis subg. Clematis and Clematis subg. Viticella, and species in Clematis subg. Clematis have been crossed with species in Clematis subg. Viticella. Chromosome morphology is strikingly similar in all subgenera.

The circumscription of subgenera in this work follows C. S. Keener and W. M. Dennis (1982). Major realignments have been proposed by F. B. Essig (1992) on the basis of seedling morphology, including the transfer of Clematis recta and C. terniflora to Clematis subg. Viorna.

Many species are valued as ornamentals; some have escaped from cultivation and have become established in the flora.

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

Key
1. Leaflets and lobes linear to narrowly lanceolate, 0.5–6(–10) mm wide.
var. hirsutissima
1. Leaflets and lobes narrowly to broadly lanceolate or ovate, 5–15 mm wide.
var. scottii
1. Sepals ± thick, leathery, connivent proximally and usually much of length; perianth bell- to urn-shaped, blue, violet, or yellowish white
Subg. Viorna
1. Sepals thin, spreading, not connivent; perianth widely bell-shaped to rotate, or if narrowly bell-shaped, bright yellow.
→ 2
2. Staminate flowers with petaloid staminodes between stamens and sepals; perianth widely bell-shaped or tardily rotate.
Subg. Atragene
2. Staminate flowers without staminodes between stamens and sepals; perianth rotate, sepals wide-spreading, or sepals recurved at least toward tip.
→ 3
3. Flowers 1–many (if flowers solitary, either unisexual or with yellow sepals), generally in cymes or panicles, unisexual or bisexual; sepals white or yellow, linear-oblong, elliptic, lanceolate, ovate, oblanceolate, or obovate.
Subg. Clematis
3. Flowers 1–3 (if 1, sepals not yellow), in axillary clusters, bisexual; sepals blue to violet, rarely white, broadly obovate to elliptic-rhombic.
Subg. Viticella
Source FNA vol. 3. FNA vol. 3. Author: James S. Pringle.
Parent taxa Ranunculaceae > Clematis > subg. Viorna Ranunculaceae
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. 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
Subordinate taxa
C. hirsutissima var. hirsutissima, C. hirsutissima var. scottii
Subg. Atragene, Subg. Clematis, Subg. Viorna, Subg. Viticella
Synonyms Coriflora hirsutissima
Name authority Pursh: Fl. Amer. Sept. 2: 385. (1814) Linnaeus: Sp. Pl. 1: 543. 175: Gen. Pl. ed. 5, 242. (1754)
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