Delphinium robustum

Rydberg

Bull. Torrey Bot. Club 28: 276. 1901.

Common names: Robust larkspur
Conservation concernEndemicIllustrated
Treatment appears in FNA Volume 3.

Stems 100-200 (-250) cm; base sometimes reddish, glabrous, glaucous. Leaves cauline, 12-22, absent from proximal 1/5 of stem at anthesis; petiole 5-13 cm. Leaf-blade round to pentagonal, 7-12 × 10-20 cm, nearly glabrous; ultimate lobes 5-15, width 6-30 mm, tips gradually tapered to mucronate apex; midcauline leaf lobes more than 3 times longer than wide. Inflorescences 40-90 (-180) -flowered; pedicel 0.5-2 cm, puberulent; bracteoles 4-6 mm from flowers, green to purple, linear, 5-8 mm, puberulent. Flowers: sepals bluish purple to pale lavender, nearly glabrous, lateral sepals ± forward pointing, 9-14 × 4-6 mm, spurs slightly decurved, 30-45° above horizontal, dark blue, 10-13 mm; lower petal blades ± covering stamens, 5-7 mm, clefts 2-3 mm; hairs centered, mostly on inner lobes near base of cleft, yellow to white. Fruits 13-18 mm, 3-4 times longer than wide, puberulent. Seeds wing-margined; seed-coat cells elongate, surfaces smooth.


Phenology: Flowering summer.
Habitat: Riparian woodlands, subalpine meadows
Elevation: 2200-3000 m

Discussion

Of conservation concern.

Delphinium robustum is the representative of the southern Cordilleran complex from the Jemez, San Antonio, San Juan, San Pedro, and Sangre de Cristo mountains. Hybrids are known with D. sapellonis.

Selected References

None.

Lower Taxa

None.
... more about "Delphinium robustum"
Michael J. Warnock +
Rydberg +
usually larger +
glaucous +  and glabrous +
not narrowed +
expanded +
straight +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
subopposite-subalternate +
green +  and purple +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0 cm0 mm <br />0 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
globose;cylindric +
elongate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Robust larkspur +
Colo. +  and N.Mex. +
2200-3000 m +
sessile +  and pedicellate +
showy +  and inconspicuous +
cylindric +
1.3 cm13 mm <br />0.013 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
sessile +  and aggregate +
curved-cylindric +
Riparian woodlands, subalpine meadows +
yellow;white +
40-90(-180)-flowered +
axillary +  and terminal +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
less ovate +  and elliptic +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
7 cm70 mm <br />0.07 m <br /> (12 cm120 mm <br />0.12 m <br />) +
round +  and pentagonal +
whorled +, opposite +  and alternate +
smaller +, slightly below middle slightly below middle internodes +  and largest +
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 +
reduced +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
distinct +
conspicuous +
spurred +, funnel--shaped +, cup-shaped +  and plane +
reduced +
5 cm50 mm <br />0.05 m <br /> (13 cm130 mm <br />0.13 m <br />) +
Flowering summer. +
Bull. Torrey Bot. Club +
2-100-flowered +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
twisted +  and 4-15-branched +
tuberlike +
10 cm100 mm <br />0.1 m <br /> (80 cm800 mm <br />0.8 m <br />) +
wing-margined +
dark-brown +  and black +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
not ringed +
rectangular +  and crescent-shaped +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
bluish purple;pale lavender +
not persistent +
distinct +
3 +  and 6 +
not +  and veined +
Conservation concern +, Endemic +  and Illustrated +
30-45° +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
200 cm2,000 mm <br />2 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
3 +  and 8 +
100 cm1,000 mm <br />1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
persistent +
Delphinium robustum +
Delphinium subsect. Exaltata +
species +
gradually tapered +  and mucronate +
0.6 cm6 mm <br />0.006 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
herbaceous +  and woody +