Delphinium variegatum |
Delphinium stachydeum |
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royal larkspur |
hedgenettle larkspur, Rocky Mountain larkspur, spike larkspur, Umatilla larkspur |
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Stems | (10-)20-50(-80) cm; base reddish or not, not longitudinally ridged, long-pubescent. |
(40-)70-150(-200) cm; base reddish, puberulent. |
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Leaves | blade round to pentagonal, 1-4.5 × 2-6 cm, pubescent; ultimate lobes 3-15, width 3-8 mm (basal), 2-5 mm (cauline). |
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. |
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Inflorescences | (4-)6-17(-20)-flowered, open; pedicel 0.5-3(-7) cm, usually puberulent; bracteoles 2-7(-23) mm from flowers, green, linear-lanceolate, 3-8 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. |
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Flowers | sepals usually deep royal blue, sometimes bright blue to light blue or white, ± finely pubescent, lateral sepals spreading, 10-18(-25) × 6-10 mm, spurs straight, ascending ca. 30° above horizontal, 10-19 mm; lower petal blades slightly elevated, ± exposing stamens, 4-11 mm, clefts 0.5-3.5 mm; hairs sparse, more on inner lobes than outer lobe or centered, scattered on margins, white or yellow. |
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. |
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Fruits | 9-19 mm, 2.2-3.8 times longer than wide, ± puberulent. |
10-15 mm, 3.5-4.5 times longer than wide, puberulent. |
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Seeds | not echinate, appearing ± smooth to naked eye; seed coat cells with margins ± undulate, surfaces roughened. |
wing-margined; seed coat cells with margins straight, surfaces ± roughened. |
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Delphinium variegatum |
Delphinium stachydeum |
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Phenology | Flowering summer. | |||||||||
Habitat | Swales in Artemisia scrub | |||||||||
Elevation | 1300-3000 m (4300-9800 ft) | |||||||||
Distribution |
CA
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CA; ID; NV; OR; WA
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Discussion | Subspecies 3 (3 in the flora). (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.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||||||
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Echinata | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Wislizenana | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | D. scopulorum var. stachydeum, D. confertiflorum, D. umatillense | |||||||||
Name authority | Torrey & A. Gray: Fl. N. Amer. 1: 32. 183: not D. variegatum Baillon 1883 | (A. Gray) Tidestrom: Proc. Biol. Soc. Wash. 27: 61. (1914) | ||||||||
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