Clematis hirsutissima

Pursh

Fl. Amer. Sept. 2: 385. 1814.

IllustratedEndemic
Basionym: Coriflora hirsutissima (Pursh) W. A. Weber Phytologia 79: 65-66. 1996[1995]
Treatment appears in FNA Volume 3.

Stems erect, not viny, 1.5-6.5 dm, hirsute (sometimes sparsely so in var. hirsutissima) or densely short, soft-pubescent to nearly glabrous. Leaf-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. Inflorescences terminal, flowers solitary. 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. Achenes: bodies densely long-pubescent; beak 4-9 cm, plumose.

Distribution

Ariz., Colo., Idaho, Mont., N.Mex., Nebr., Okla., Oreg., S.Dak., Utah, Wash., Wyo.

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.

Selected References

None.

Key

1 Leaflets and lobes linear to narrowly lanceolate, 0.5–6(–10) mm wide. Clematis hirsutissima var. hirsutissima
1 Leaflets and lobes narrowly to broadly lanceolate or ovate, 5–15 mm wide. Clematis hirsutissima var. scottii

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

... more about "Clematis hirsutissima"
flattened +
James S. Pringle +
cuneate +, truncate +  and cordate +
Coriflora hirsutissima +
curved +  and straight +
variable +
plumose +
4 cm40 mm <br />0.04 m <br /> (9 cm90 mm <br />0.09 m <br />) +
long-pubescent +
scale-like;leaflike +
globose;cylindric +
linear;lanceolate +
linear;lanceolate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
bracteate +  and 3-7-flowered +
paired +  and solitary +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Ariz. +, Colo. +, Idaho +, Mont. +, N.Mex. +, Nebr. +, Okla. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
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 +
axillary +  and terminal +
cordate +  and orbiculate oblong lanceolate or oblanceolate lobed or unlobed +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
lobed +  and 2-several-lobed +
palmate +  and pinnate +
expanded +
thin;0.5mm;2mm +
1-many-flowered +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
distinct +
conspicuous +
reduced +
5 +  and 150 +
Fl. Amer. Sept. +
not arillate +  and stalked +
white;pink;dark violet-blue +
not persistent +
distinct +
abaxially glabrous +  and silky hirsute or tomentose +
3 +  and 6 +
oblong-lanceolate +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Illustrated +  and Endemic +
persistent +
not glaucous;silky-hirsute +
Clematis hirsutissima +
Clematis subg. Viorna +
species +
obtuse +  and acute +
annual +  and perennial +