Delphinium wootonii |
Delphinium trolliifolium |
|
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Organ Mountain larkspur, Wooton's larkspur |
Columbian larkspur, cow-poison, poison delphinium, poison larkspur |
|
Stems | (15-)30-50(-60) cm; base sometimes reddish, pubescent. |
(40-)60-120(-180) cm; base usually reddish, glabrous to puberulent. |
Leaves | blade reniform to fan-shaped, 1.5-3 × 2.5-4 cm, puberulent; ultimate lobes 5-24, width 2-6 mm (basal), 1-3 mm (cauline). |
blade ± pentagonal, 4-8 × 7-16 cm, margins ± incised, nearly glabrous; ultimate lobes 0-9, width 15-30 mm (basal), 5-20 mm (cauline), widest at middle or in proximal 1/2. |
Inflorescences | 15-30(-49)-flowered; pedicel 1-2(-3.6) cm, puberulent; bracteoles 1-5 mm from flowers, green, linear, 1-4(-12) mm, puberulent. |
(5-)14-40(-75)-flowered, ± open, at least 2 times longer than wide; pedicel 1-4(-9) cm, puberulent to glabrous; bracteoles (2-)6-12 mm from flowers, green, linear, 5-9(-14) mm, puberulent. |
Flowers | sepals white to lavender, nearly glabrous, lateral sepals usually reflexed, (6-)8-13 × 3-7 mm, spur straight, ascending 30-80° above horizontal, (8-)13-20(-25) mm; lower petal blades ± elevated, 6-9 mm, cleft 2.5-4.5 mm; hairs centered, densest near base of cleft, white. |
sepals dark blue, glabrous, lateral sepals spreading, (8-)14-21 × 5-9 mm, spurs straight or downcurved at apex, within 20° of horizontal, (10-)16-23 mm; lower petal blades covering stamens, 5-10 mm, clefts 1.5-3 mm; hairs sparse, mostly near junction of blade and claw, centered or on inner lobes, well dispersed, yellow. |
Fruits | (10-)11-20(-24) mm, 3-3.5 times longer than wide, glabrous. |
(15-)23-34 mm, 3.8-5.5 times longer than wide, glabrous. |
Seeds | seed coat cells with surfaces pustulate. |
unwinged; seed coats smooth. |
2n | = 16. |
= 16. |
Delphinium wootonii |
Delphinium trolliifolium |
|
Phenology | Flowering spring. | Flowering spring. |
Habitat | Oak woods, grasslands, desert scrub | Oak woods, coastal chaparral, wet woodlands |
Elevation | 700-1800 m (2300-5900 ft) | 30-1100 m (100-3600 ft) |
Distribution |
AZ; CO; NM; TX; Mexico (Sonora, Chihuahua, and Coahuila)
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CA; OR
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Discussion | Delphinium wootonii hybridizes with D. madrense in the eastern Big Bend area of Texas, and with D. carolinianum subsp. virescens. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Delphinium trolliifolium occurs in the northern Coast Range of California, the Columbia River Valley to just east of Mt. Hood, and the Willamette Valley of Oregon upstream to Lane County. California plants differ somewhat from Oregon plants in pubescence patterns and habitat preferences. Further study may show that two entities are involved here. Hybrids between Delphinium trolliifolium and D. decorum, D. menziesii subsp. pallidum (D. ×pavonaceum Ewan, Peacock larkspur), D. nudicaule, D. nuttallianum, and D. nuttallii are known. Delphinium trolliifolium is likely to be confused only with D. bakeri. Refer to discussion under that species for differences. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Virescens | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa |
Sibling taxa | ||
Synonyms | D. virescens subsp. wootonii | |
Name authority | Rydberg: Bull. Torrey Bot. Club 26: 587. (1900) | A. Gray: Proc. Amer. Acad. Arts 8: 375. (1872) |
Web links |