Delphinium stachydeum

(A. Gray) Tidestrom

Proc. Biol. Soc. Wash. 27: 61. 1914.

Common names: Umatilla larkspur
EndemicIllustrated
Basionym: Delphinium scopulorum var. stachydeum A. Gray Bot. Gaz. 12: 52. 1887
Synonyms: Delphinium confertiflorum Wooton Delphinium umatillense Ewan
Treatment appears in FNA Volume 3.

Stems (40-) 70-150 (-200) cm; base reddish, puberulent. Leaves mostly on proximal 1/2 stem; basal leaves absent at anthesis; cauline leaves 8-16 at anthesis; petiole 0.5-17 cm. Leaf-blade light green, ± round, 2-8 × 3.5-11 cm, sparsely pubescent; ultimate lobes 7-19, width 1-8 mm, apex tapering to point; veins obscure. Inflorescences (14-) 30-60 (-102) -flowered, dense, cylindric; pedicel spreading, 0.8-2 (-3) cm, puberulent; bracteoles 1-4 mm from flowers, green, linear, 2-7 (-10) mm, puberulent. Flowers: sepals bright blue, puberulent, lateral sepals spreading, 9-13 × 4-7 mm, spurs straight, within 30° above or below horizontal, 11-17 mm; lower petal blades ± covering stamens, 4-8 mm, clefts 0.5-2 mm; hairs sparse, centered, mostly near junction of blade and claw above base of cleft, white. Fruits 10-15 mm, 3.5-4.5 times longer than wide, puberulent. Seeds wing-margined; seed-coat cells with margins straight, surfaces ± roughened.


Phenology: Flowering summer.
Habitat: Swales in Artemisia scrub
Elevation: 1300-3000 m

Distribution

V3 481-distribution-map.gif

Calif., Idaho, Nev., Oreg., Wash.

Discussion

Populations of Delphinium stachydeum are widely scattered in isolated mountain ranges surrounded by desert or grassland. The species has been reported (visual sightings) from northwestern Utah; no specimens have been seen from there. Hybrids between D. stachydeum and D. glaucum have been reported. Although D. stachydeum has been seen flowering within 30 m of flowering D. depauperatum, no hybrids have been observed.

Delphinium stachydeum may possibly be confused with D. geyeri, from which it may be distinguished by its usually greater plant size, less pubescent foliage, and later flowering date. Delphinium stachydeum also may be confused with D. glaucum; see discussion under that species.

Selected References

None.

Lower Taxa

None.

"entire" is not a number."thin" is not a number.

... more about "Delphinium stachydeum"
tapering +
Michael J. Warnock +
(A. Gray) Tidestrom +
usually larger +
puberulent +
narrowed +
expanded +
Delphinium scopulorum var. stachydeum +
straight +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
smaller +
subopposite-subalternate +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0 cm0 mm <br />0 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
globose;cylindric +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Umatilla larkspur +
Calif. +, Idaho +, Nev. +, Oreg. +  and Wash. +
1300-3000 m +
showy +  and inconspicuous +
cylindric-narrow-pyramidal +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
sessile +  and aggregate +
curved-cylindric +
Swales in Artemisia scrub +
(14-)30-60(-102)-flowered +
axillary +  and terminal +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
less ovate +  and elliptic +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
whorled +, opposite +  and alternate +
cauline +  and basal +
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 +
smaller +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
distinct +
conspicuous +
spurred +, funnel--shaped +, cup-shaped +  and plane +
reduced +
0.5 cm5 mm <br />0.005 m <br /> (17 cm170 mm <br />0.17 m <br />) +
Flowering summer. +
Proc. Biol. Soc. Wash. +
2-100-flowered +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
3-8-branched +
24 cm240 mm <br />0.24 m <br /> (80 cm800 mm <br />0.8 m <br />) +
tuberlike +
15 cm150 mm <br />0.15 m <br /> (24 cm240 mm <br />0.24 m <br />) +
dry +  and fleshy +
wing-margined +
dark-brown +  and black +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
not ringed +
rectangular +  and crescent-shaped +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
thread-like +
bright blue +
not persistent +
distinct +
3 +  and 6 +
not +  and veined +
Endemic +  and Illustrated +
straight +
below horizontal +  and 30° +
1.1 cm11 mm <br />0.011 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
70 cm700 mm <br />0.7 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
persistent +
Delphinium confertiflorum +  and Delphinium umatillense +
Delphinium stachydeum +
Delphinium subsect. Wislizenana +
species +
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 +