The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links
Delphinium oreganum

Willamette Valley larkspur

tall larkspur

Stems

40-70 cm.

70-200 cm;

base reddish, nearly glabrous.

Leaves

blade pentagonal, 2-7 × 3-9 cm, puberulent; ultimate lobes 3-7, width 5-25 mm;

midcauline leaf lobes less than 3 times longer than wide.

Inflorescences

8-30-flowered;

pedicel 0.5-2 cm, puberulent;

bracteoles 2-4 mm from flowers, green, linear, 2-4 mm, puberulent.

Flowers

sepals blue or bluish purple, spurs 10-13 mm;

lower petal blades 4.5-6.5 mm.

sepals whitish to pale lavender or purple, puberulent, lateral sepals forward pointing, 9-11 × 4-6 mm, spurs straight, as much as 45° above or below horizontal, 9-12 mm;

lower petal blades ± covering stamens, 3-5 mm, clefts 1-2 mm;

hairs centered, mostly near base of cleft, white.

Fruits

7-12 mm, 2-2.5 times longer than wide, ± puberulent.

Seeds

± wing-margined;

seed coat cells elongate, surfaces smooth.

2n

= 16.

Delphinium nuttallii subsp. nuttallii

Delphinium exaltatum

Phenology Flowering late spring–early summer. Flowering summer.
Habitat Rock outcrops, rocky meadows Rocky slopes in open deciduous woods and barrens, mainly on calcareous substrates, also shale and mafic and ultramafic rocks
Elevation 20-300 m (100-1000 ft) 150-2000 m (500-6600 ft)
Distribution
from FNA
OR; WA
from FNA
AL; KY; MD; MO; NC; OH; PA; TN; VA; WV
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 3. FNA vol. 3.
Parent taxa Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Grumosa > Delphinium nuttallii Ranunculaceae > Delphinium > sect. Diedropetala > subsect. Exaltata
Sibling taxa
D. nuttallii subsp. nuttallii, D. nuttallii subsp. ochroleucum
D. alabamicum, D. alpestre, D. andersonii, D. andesicola, D. antoninum, D. bakeri, D. barbeyi, D. basalticum, D. bicolor, D. brachycentrum, D. californicum, D. cardinale, D. carolinianum, D. decorum, D. depauperatum, D. distichum, D. elatum, D. geraniifolium, D. geyeri, D. glareosum, D. glaucescens, D. glaucum, D. gracilentum, D. gypsophilum, D. hansenii, D. hesperium, D. hutchinsoniae, D. inopinum, D. lineapetalum, D. luteum, D. madrense, D. menziesii, D. multiplex, D. newtonianum, D. novomexicanum, D. nudicaule, D. nuttallianum, D. nuttallii, D. parishii, D. parryi, D. patens, D. polycladon, D. purpusii, D. ramosum, D. recurvatum, D. robustum, D. sapellonis, D. scaposum, D. scopulorum, D. stachydeum, D. sutherlandii, D. treleasei, D. tricorne, D. trolliifolium, D. uliginosum, D. umbraculorum, D. variegatum, D. viridescens, D. wootonii, D. xantholeucum
Name authority unknown Aiton: Hort. Kew. 2: 244. (1789)
Web links