Delphinium geraniifolium |
Delphinium andersonii |
|
---|---|---|
Clark Valley larkspur, Mogollon larkspur |
Anderson larkspur, Anderson's larkspur, desert larkspur |
|
Stems | 60-100 cm; base reddish, puberulent, midstems pubescent. |
(20-)30-60(-90) cm; base reddish, glabrous. |
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 round, 1.5-4 × 2-6 cm, nearly glabrous; ultimate lobes 5-30, width 2-8 mm (basal), 1-4 mm (cauline); lobe width of proximal leaves less than 4 mm. |
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. |
10-25-flowered, cylindric; pedicel sigmoid (proximally spreading, distally ascending), 1-4(-6.8) cm, glabrous to puberulent; bracteoles 2-6(-8) mm from flowers, green, linear, 4-6(-11) 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 dark blue, nearly glabrous, lateral sepals spreading to reflexed, 9-16 × 3-7 mm, spurs horizontal to slightly ascending, often decurved apically, 12-18 mm; lower petal blades elevated, ± exposing stamens, 4-8 mm, clefts 1-4 mm; hairs centered, mostly between claw and base of cleft, white. |
Fruits | 13-18 mm, 3-3.5 times longer than wide, puberulent. |
17-32 mm, 4-5.5 times longer than wide, glabrous. |
Seeds | unwinged; seed coat cells with margins straight, surfaces ± roughened. |
seed coat cells ± brick-shaped, cell margins ± undulate, surfaces smooth. |
2n | = 16. |
= 16. |
Delphinium geraniifolium |
Delphinium andersonii |
|
Phenology | Flowering summer. | Flowering late spring–early summer. |
Habitat | Heavy clay soil, dry meadows in coniferous woods | Talus, cold desert scrub, often growing up through shrubs, low places where snow collects |
Elevation | 1800-3400 m (5900-11200 ft) | 1300-2000 m (4300-6600 ft) |
Distribution |
AZ; NM
|
CA; ID; MT; NV; OR; UT
|
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.) |
In much of its range Delphinium andersonii hybridizes occasionally with members of the D. nuttallianum complex and apparently with D. parishii in at least one site in California. These three taxa, with D. scaposum, form an interesting group in that they appear to be ecological replacements for one another, with D. parishii occupying arid, hot deserts to the south and southwest, D. andersonii growing in cooler, higher latitude and altitude deserts farther north, D. scaposum in cool deserts farther east, and D. nuttallianum at higher elevations in much of the geographic range of the other three species. Delphinium andersonii is often mistaken for D. nuttallianum. Most individuals of D. andersonii (roots much larger and more fibrous; stems solidly attached to roots; fruits long, narrow, erect; inflorescences usually longer and narrower at base; and pedicel sigmoid) can easily be distinguished from D. nuttallianum (roots smaller and not fibrous; stems tenuously attached to roots; fruits shorter, proportionally thicker, spreading; inflorescences relatively shorter and wider at base; and pedicel nearly straight). Although roots of Delphinium andersonii are quite similar to those of D. antoninum, the two taxa may be readily distinguished by most features that separate D. nuttallianum from D. andersonii. The name Delphinium menziesii was misapplied to D. andersonii by S. Watson. (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. Subscaposa |
Sibling taxa | ||
Synonyms | D. tenuisectum subsp. amplibracteatum | D. andersonii subsp. cognatum |
Name authority | Rydberg: Bull. Torrey Bot. Club 26: 583. (1899) | A. Gray: Bot. Gaz. 12: 53. (1887) |
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