Flora of North America species comparison

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Delphinium umbraculorum

Delphinium newtonianum

umbrella larkspur

newton's larkspur, Ozark larkspur
Stems

40-70(-90) cm;

base often reddish, glabrous or puberulent.

40-90 cm;

base often reddish, puberulent.
Leaves

blade round to pentagonal, 1.5-4 × 2-6 cm, nearly glabrous; ultimate lobes 3-13, width 3-20 mm (basal), 1-8 mm (cauline).

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

(5-)10-25(-45)-flowered, open, narrowly pyramidal;

pedicel 0.5-3(-7) cm, glabrous to puberulent;

bracteoles 3-7 mm from flowers, green, linear, 3-6 mm, puberulent.

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 dark blue, puberulent, lateral sepals spreading, 9-16 × 4-7 mm, spurs gently upcurved, ascending 30-45° above horizontal, 8-14 mm;

lower petal blades elevated, exposing stamens, 3.5-6 mm, clefts 0.5-1.5 mm;

hairs densest near junction of blade and claw above base of cleft, centered or on inner lobes, white.

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

9-16(-19) mm, 2.5-3(-4) times longer than wide, puberulent.

8-12 mm, 3-3.5 times longer than wide, nearly glabrous.
Seeds

seed coat cells brick-shaped, cell margins straight, surfaces smooth.

unwinged;

surface of each seed coat cell with swollen, blunt, hairlike structures, barely visible at 20x, otherwise smooth.
2n

= 16.

Delphinium umbraculorum

Delphinium newtonianum
Phenology Flowering late spring–early summer. Flowering early summer.
Habitat Slopes in oak forests Slopes in deciduous forest
Elevation 400-1600 m (1300-5200 ft) 500-700 m (1600-2300 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
AR
[BONAP county map]
Discussion

Delphinium umbraculorum is most often confused with D. patens subsp. hepaticoideum; refer to discussion of that taxon for distinguishing features. Hybrids occur with D. parryi and D. patens subsp. montanum.

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

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. Subscaposa 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. variegatum, D. viridescens, D. wootonii, D. xantholeucum
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. 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 H. F. Lewis & Epling: Brittonia 8: 19. (1954) D. M. Moore: Rhodora 41: 196. (1939)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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