Delphinium nuttallii subsp. nuttallii(synonym of Delphinium oreganum) |
Delphinium newtonianum |
|
---|---|---|
Willamette Valley larkspur |
newton's larkspur, Ozark larkspur |
|
Stems | 40-70 cm. |
40-90 cm; base often reddish, puberulent. |
Leaves | blade round to pentagonal, 4-7 × 5-15 cm, nearly glabrous; ultimate lobes 3-7, width 8-20 mm (basal), 5-15 mm (cauline), widest at middle or in proximal 1/2. |
|
Inflorescences | 8-20(-40)-flowered, as wide as long or nearly so; pedicel 1-4(-6) cm, pubescent; bracteoles 6-15 mm from flowers, green, linear, 1.5-5 mm, puberulent. |
|
Flowers | sepals blue or bluish purple, spurs 10-13 mm; lower petal blades 4.5-6.5 mm. |
sepals dark to light blue, rarely white, glabrous, lateral sepals spreading, 12-14 × 6-7 mm, spurs straight to decurved, within 30° of horizontal, 10-15 mm; lower petal blades slightly elevated, ± exposing stamens, 4-5 mm, clefts 2-3 mm; hairs mostly centered near base of cleft, yellow. |
Fruits | 8-12 mm, 3-3.5 times longer than wide, nearly glabrous. |
|
Seeds | unwinged; surface of each seed coat cell with swollen, blunt, hairlike structures, barely visible at 20x, otherwise smooth. |
|
2n | = 16. |
|
Delphinium nuttallii subsp. nuttallii |
Delphinium newtonianum |
|
Phenology | Flowering late spring–early summer. | Flowering early summer. |
Habitat | Rock outcrops, rocky meadows | Slopes in deciduous forest |
Elevation | 20-300 m (100-1000 ft) | 500-700 m (1600-2300 ft) |
Distribution |
OR; WA |
AR |
Discussion | No cases of hybridization are known. Delphinium newtonianum often occurs in mixed populations with D. tricorne. It normally does not begin flowering until 4-6 weeks after D. tricorne has finished. (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 > Delphinium nuttallii | Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa |
Sibling taxa | ||
Name authority | unknown | D. M. Moore: Rhodora 41: 196. (1939) |
Web links |