Delphinium distichum

Geyer ex Hooker

J. Bot. 6: 68. 1847.

Common names: Strict larkspur meadow larkspur
EndemicIllustrated
Synonyms: Delphinium strictum var. distichiflorum (Hooker) H. St. John
Treatment appears in FNA Volume 3.

Stems (25-) 30-60 (-80) cm; base sometimes reddish, puberulent. Leaves basal and cauline; basal leaves usually absent at anthesis; cauline leaves 9-18 (-28) at anthesis; petiole 0-9 cm. Leaf-blade cuneate to semicircular, 1-5 × 1.5-7 cm, puberulent; ultimate lobes 5-19, width 2-8 (-15) mm (basal), 0.5-3 (-5) mm (cauline); margins of basal leaf, measured less than 1 cm from blade base, demarcating considerably more than 90° of arc when leaf laid flat; most cauline leaf-blades exceeding internodes. Inflorescences 8-30 (-40) -flowered, usually dense; pedicel 0.5-1.5 cm, puberulent; bracteoles 0-3 mm from flowers, green to blue, linear, 4-8 mm, puberulent. Flowers: sepals dark blue to bluish purple, puberulent, lateral sepals ± erect, 8-12 × 3.5-5 mm, spurs straight, horizontal or nearly so, 9-15 mm; lower petal blades ± covering stamens, 4.5-6.5 mm, clefts 2-3 mm; hairs centered mostly near base of cleft, white. Fruits 7-13 mm, 3.5-4 times longer than wide, ± puberulent. Seeds: seed-coat cells with surfaces roughened. 2n = 16.


Phenology: Flowering late spring–early summer.
Habitat: Wet meadows
Elevation: 100-2400 m

Distribution

V3 187-distribution-map.gif

B.C., Idaho, Mont., Oreg., Wash., Wyo.

Discussion

Delphinium distichum hybridizes with D. multiplex and D. nuttallianum (D. ×diversicolor Rydberg). The name D. burkei has often been misapplied to D. distichum.

Selected References

None.

Lower Taxa

None.
... more about "Delphinium distichum"
Michael J. Warnock +
Geyer ex Hooker +
usually larger +
puberulent +
narrowed +
expanded +
straight +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
smaller +
subopposite-subalternate +
green +  and blue +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
minute +
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 />) +
Strict larkspur +  and meadow larkspur +
B.C. +, Idaho +, Mont. +, Oreg. +, Wash. +  and Wyo. +
100-2400 m +
showy +  and inconspicuous +
cylindric +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
sessile +  and aggregate +
curved-cylindric +
Wet meadows +
8-30(-40)-flowered +
axillary +  and terminal +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
less ovate +  and elliptic +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
cuneate +  and semicircular +
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 +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
distinct +
conspicuous +
spurred +, funnel--shaped +, cup-shaped +  and plane +
reduced +
0 cm0 mm <br />0 m <br /> (9 cm90 mm <br />0.09 m <br />) +
Flowering late spring–early summer. +
2-100-flowered +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
2-8-branched +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
tuberlike +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
dry +  and fleshy +
wing-margined +
dark-brown +  and black +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
not ringed +
rectangular +  and crescent-shaped +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
dark blue;bluish purple +
not persistent +
distinct +
3 +  and 6 +
not +  and veined +
Endemic +  and Illustrated +
straight +
nearly +  and horizontal +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
60 cm600 mm <br />0.6 m <br /> (80 cm800 mm <br />0.8 m <br />) +
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 m <br />) +
persistent +
Delphinium strictum var. distichiflorum +
Delphinium distichum +
Delphinium subsect. Depauperata +
species +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.2 cm2 mm <br />0.002 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 +