Delphinium geraniifolium |
Delphinium stachydeum |
|
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Clark Valley larkspur, Mogollon larkspur |
hedgenettle larkspur, Rocky Mountain larkspur, spike larkspur, Umatilla larkspur |
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Stems | 60-100 cm; base reddish, puberulent, midstems pubescent. |
(40-)70-150(-200) cm; base reddish, puberulent. |
Leaves | blade dark green, at least adaxially, fan-shaped to reniform, 2-5 × 3-7 cm, pubescent, especially abaxially; ultimate lobes 5-15, width 4-15 mm (basal lobes 5-15 mm), apex abruptly tapered, usually mucronate; veins prominent. |
blade light green, ± round, 2-8 × 3.5-11 cm, sparsely pubescent; ultimate lobes 7-19, width 1-8 mm, apex tapering to point; veins obscure. |
Inflorescences | 20-90-flowered, dense, cylindric; pedicel ascending to spreading, 1-2 cm, puberulent; bracteoles 1-2 mm from flowers, green, linear, 4-6 mm, puberulent. |
(14-)30-60(-102)-flowered, dense, cylindric; pedicel spreading, 0.8-2(-3) cm, puberulent; bracteoles 1-4 mm from flowers, green, linear, 2-7(-10) mm, puberulent. |
Flowers | sepals dark blue to purple, puberulent, lateral sepals spreading to slightly forward pointing, 10-14 × 3-5 mm, spurs ascending 20-70°, truncate or downcurved apically, 12-15 mm; lower petal blades slightly elevated, ± exposing stamens, 4-6 mm, clefts 0.5-2 mm; hairs sparse, local below junction of blade and claw, scattered on margins, white. |
sepals bright blue, puberulent, lateral sepals spreading, 9-13 × 4-7 mm, spurs straight, within 30° above or below horizontal, 11-17 mm; lower petal blades ± covering stamens, 4-8 mm, clefts 0.5-2 mm; hairs sparse, centered, mostly near junction of blade and claw above base of cleft, white. |
Fruits | 13-18 mm, 3-3.5 times longer than wide, puberulent. |
10-15 mm, 3.5-4.5 times longer than wide, puberulent. |
Seeds | unwinged; seed coat cells with margins straight, surfaces ± roughened. |
wing-margined; seed coat cells with margins straight, surfaces ± roughened. |
2n | = 16. |
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Delphinium geraniifolium |
Delphinium stachydeum |
|
Phenology | Flowering summer. | Flowering summer. |
Habitat | Heavy clay soil, dry meadows in coniferous woods | Swales in Artemisia scrub |
Elevation | 1800-3400 m (5900-11200 ft) | 1300-3000 m (4300-9800 ft) |
Distribution |
AZ; NM
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CA; ID; NV; OR; WA
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Discussion | Delphinium geraniifolium is a more pubescent analog of the closely related D. scopulorum, the former occurring in heavier soils at higher elvation. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Populations of Delphinium stachydeum are widely scattered in isolated mountain ranges surrounded by desert or grassland. The species has been reported (visual sightings) from northwestern Utah; no specimens have been seen from there. Hybrids between D. stachydeum and D. glaucum have been reported. Although D. stachydeum has been seen flowering within 30 m of flowering D. depauperatum, no hybrids have been observed. Delphinium stachydeum may possibly be confused with D. geyeri, from which it may be distinguished by its usually greater plant size, less pubescent foliage, and later flowering date. Delphinium stachydeum also may be confused with D. glaucum; see discussion under that species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Wislizenana | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Wislizenana |
Sibling taxa | ||
Synonyms | D. tenuisectum subsp. amplibracteatum | D. scopulorum var. stachydeum, D. confertiflorum, D. umatillense |
Name authority | Rydberg: Bull. Torrey Bot. Club 26: 583. (1899) | (A. Gray) Tidestrom: Proc. Biol. Soc. Wash. 27: 61. (1914) |
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