Delphinium trolliifolium |
Delphinium basalticum |
|
---|---|---|
Columbian larkspur, cow-poison, poison delphinium, poison larkspur |
basalt larkspur, basaltic larkspur, Columbia Gorge larkspur |
|
Stems | (40-)60-120(-180) cm; base usually reddish, glabrous to puberulent. |
20-50(-65) cm; base often reddish, puberulent. |
Leaves | 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. |
blade round, 2-6 × 5-9 cm, not succulent, nearly glabrous; ultimate lobes 5-19, width 3-15 mm (basal), 1-12 mm (cauline). |
Inflorescences | (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. |
(2-)6-16(-26)-flowered; pedicel 2-7 cm, nearly glabrous; bracteoles 4-12 mm from flowers, green, linear, 3-7 mm, nearly glabrous. |
Flowers | 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. |
sepals dark blue, nearly glabrous, lateral sepals spreading, 15-21 × 7-10 mm, spur straight to decurved, ascending 30-45° above horizontal, 14-18 mm; lower petal blades slightly elevated, ± exposing stamens, 7-9 mm, cleft 4-5 mm; hairs centered, mostly on inner lobes above base of cleft, yellow to white. |
Fruits | (15-)23-34 mm, 3.8-5.5 times longer than wide, glabrous. |
12-17 mm, 3.5-4 times longer than wide, glabrous. |
Seeds | unwinged; seed coats smooth. |
± wing-margined; seed coat cells with surfaces smooth. |
2n | = 16. |
|
Delphinium trolliifolium |
Delphinium basalticum |
|
Phenology | Flowering spring. | Flowering spring (-early summer). |
Habitat | Oak woods, coastal chaparral, wet woodlands | Basaltic cliff faces, n and e slopes at base of cliffs |
Elevation | 30-1100 m (100-3600 ft) | 200-500 m (700-1600 ft) |
Distribution |
CA; OR
|
OR; WA |
Discussion | 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.) |
Of conservation concern. Hybrids between Delphinium basalticum and D. trolliifolium are known. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Bicoloria |
Sibling taxa | ||
Name authority | A. Gray: Proc. Amer. Acad. Arts 8: 375. (1872) | M. J. Warnock: Phytologia 78: 91. (1995) |
Web links |