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

pale larkspur, white rock larkspur

Alabama larkspur

Stems

30-60 cm.

(45-)60-90(-130) cm;

base reddish, pubescent.

Leaves

blade reniform to semicircular, 2-11 × 3-19 cm, nearly glabrous; ultimate lobes 3-35, width 3-8 mm (basal), 0.5-3 mm (cauline), widest at middle or in proximal 1/2.

Inflorescences

5-27-flowered;

pedicel 1-5 cm, puberulent;

bracteoles 3-12 mm from flowers, green, linear, 2-8 mm, puberulent.

Flowers

sepals white or light yellow, spurs 9-11 mm;

lower petal blades 4-6 mm.

sepals royal blue, ± drab, often partly fading upon drying, puberulent, lateral sepals spreading, 12-20 × 5-10 mm, spurs straight, horizontal to slightly ascending, (13-)15-16.5(-19) mm;

lower petal blades ± covering reproductive parts, 4-10 mm, clefts 3-5 mm;

hairs centered between claw and base of cleft, covering most of adaxial surface, white.

Fruits

11-18 mm, 2.5-3 times longer than wide, sparsely puberulent.

Seeds

unwinged;

surface of each seed coat cell with with swollen, blunt, hairlike structures, barely visible at 20x, otherwise smooth.

2n

= 16.

= 16.

Delphinium nuttallii subsp. ochroleucum

Delphinium alabamicum

Phenology Flowering late spring. Flowering mid-late spring.
Habitat Rock outcrops, rocky meadows Very local, thin soils in and on edges of Juniperus glades on limestone substrates
Elevation 50-100 m [200-300 ft] 100-300 m [300-1000 ft]
Distribution
from FNA
OR
[WildflowerSearch map]
from FNA
AL; GA
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

The range of morphologic features of Delphinium nuttallii subsp. ochroleucum (D. leucophaeum) is almost completely encompassed within that of D. nuttallii subsp. nuttallii. Sepal color is the only feature consistently separating the two subspecies. Were it not for the fact that any given population typically has plants of only one flower color, a rank of forma would be more appropriate.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Of conservation concern.

In addition to the Alabama sites, Delphinium alabamicum is known from one population in Georgia; it might have been transplanted there. Delphinium alabamicum has not been seen in central Alabama since 1950; populations there might have been extirpated.

(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
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. exaltatum, 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
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. exaltatum, 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
Synonyms D. menziesii var. (ß) ochroleucum, D. leucophaeum
Name authority (Nuttall) M. J. Warnock: Phytologia 78: 98. (1995) Kral: Sida 6: 250. (1976)
Web links