Delphinium antoninum

Eastwood

Leafl. W. Bot. 3: 126. 1942.

Common names: Anthony Peak larkspur
Conservation concernEndemic
Treatment appears in FNA Volume 3.

Stems (7-) 15-30 (-60) cm; base reddish, glabrous to puberulent. Leaves mostly on proximal 1/3 of stem; basal leaves 3-12 at anthesis; cauline leaves 3-5 at anthesis; petiole 2-12 cm. Leaf-blade round, 0.8-4 × 1.2-8 cm, ± succulent, nearly glabrous; ultimate lobes 3-15, width 1-8 mm (basal), 1-4 mm (cauline). Inflorescences 3-25-flowered; pedicel (0.6-) 1.2-3.2 cm, usually puberulent; bracteoles 4-6 mm from flowers, green, linear, 3-5 mm, puberulent. Flowers: sepals dark blue to white, nearly glabrous, lateral sepals spreading to reflexed, 11-13 × 4-6 mm, spurs straight to gently decurved, within 30° above or below horizontal, 12-16 mm; lower petal blades elevated, exposing stamens, 3-7 mm, clefts 1.5-3 mm; hairs centered, mostly on inner lobes above base of cleft, white. Fruits 14-22 mm, 3.5-4 times longer than wide, puberulent. Seeds unwinged; seed-coat cells with surfaces smooth.


Phenology: Flowering late spring–early summer.
Habitat: Uncommon on moist talus slopes
Elevation: 1100-2700 m

Discussion

Of conservation concern.

Delphinium antoninum hybridizes with D. decorum subsp. tracyi and with D. nudicaule. Most often confused with D. decorum subsp. tracyi, it is separable on the basis of its longer root, usually reflexed sepals, and typically colorfast flowers. It also may be confused with D. andersonii; see discussion under that species.

Selected References

None.

Lower Taxa

None.
... more about "Delphinium antoninum"
Michael J. Warnock +
Eastwood +
usually larger +
glabrous +  and puberulent +
narrowed +
expanded +
Delphinium sect. Bicoloria +
straight +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
smaller +
subopposite-subalternate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
minute +
0 cm0 mm <br />0 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
globose;cylindric +
elongate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Anthony Peak larkspur +
1100-2700 m +
sessile +  and pedicellate +
showy +  and inconspicuous +
1.4 cm14 mm <br />0.014 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
sessile +  and aggregate +
curved-cylindric +
Uncommon on moist talus slopes +
axillary +  and terminal +
1.1 cm11 mm <br />0.011 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
spreading +  and reflexed +
less ovate +  and elliptic +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (4 cm40 mm <br />0.04 m <br />) +
whorled +, opposite +  and alternate +
cauline +  and basal +
reduced +
lacerate;crenate +
clawed +, 2-lobed +, ovate +  and plane +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
palmate +  and pinnate +
incised;toothed;incised;toothed;entire +
smaller +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
distinct +
conspicuous +
spurred +, funnel--shaped +, cup-shaped +  and plane +
reduced +
2 cm20 mm <br />0.02 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Flowering late spring–early summer. +
Leafl. W. Bot. +
2-100-flowered +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
braided +  and 2-9-branched +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
tuberlike +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
diffuse-fibrous +
dark-brown +  and black +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
obpyramidal +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
dark blue;white +
not persistent +
distinct +
3 +  and 6 +
not +  and veined +
Conservation concern +  and Endemic +
straight +
below horizontal +  and 30° +
straight +  and gently decurved +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 m <br />) +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
persistent +
Delphinium antoninum +
Delphinium subsect. Bicoloria +
species +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
herbaceous +  and woody +