Delphinium decorum subsp. tracyi

Ewan

Univ. Colorado Stud., Ser. D, Phys. Sci. 2: 100. 1945.

Common names: Tracy's larkspur
Endemic
Treatment appears in FNA Volume 3.

Stems 7-20 (-45) cm. Leaves: ultimate lobes 5-15, usually more than 5 lobes longer than 1/2 leaf radius, apical lobes pronounced. Inflorescences glabrous or nearly so. Flowers: lateral sepals 11-18 mm, spurs 13-20 mm; lower petal hairs white. 2n = 16.


Phenology: Flowering mid-late spring.
Habitat: Meadows in montane forests
Elevation: 700-2300 m

Discussion

Although Delphinium decorum subsp. tracyi probably occurs in southern Oregon, no specimens have been seen from that state. Habitat appears to be the main isolating mechanism between D. decorum subsp. tracyi and D. antoninum; hybrids do occur. The subspecies also hybridizes with D. nudicaule and D. trolliifolium.

Delphinium decorum subsp. tracyi may be confused with D. antoninum or D. nuttallianum. For distinctions from the former, see discussion under that species. Distinctions between D. decorum subsp. tracyi and D. nuttallianum may be made on basis of spreading, fading, bluish purple sepals of the former as opposed to reflexed, colorfast, dark blue to white sepals of the latter. Pubescence of the proximal portion of stems and larger lower petal blades of subsp. tracyi are also useful to distinguish from usually glabrous stems and smaller lower petal blades of D. nuttallianum.

Selected References

None.

Lower Taxa

None.

No values specified.

Michael J. Warnock +
usually larger +
not +  and reddish +
narrowed +
expanded +
Delphinium sect. Grumosa +
straight +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
smaller +
subopposite-subalternate +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
green +  and blue +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
linear-lanceolate +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
minute +
0 cm0 mm <br />0 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
globose;cylindric +
roughened +  and smooth +
elongate +
Tracy's larkspur +
700-2300 m +
sessile +  and pedicellate +
showy +  and inconspicuous +
glabrous +  and puberulent +
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +
sessile +  and aggregate +
curved-cylindric +
Meadows in montane forests +
white;yellow +
blunt +  and swollen +
2-10(-20)-flowered +
axillary +  and terminal +
nearly +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
less ovate +  and elliptic +
1.1 cm11 mm <br />0.011 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4.5 cm45 mm <br />0.045 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 +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
puberulent +  and glabrous +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
distinct +
conspicuous +
reduced +
0.5 cm5 mm <br />0.005 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Flowering mid-late spring. +
Univ. Colorado Stud., Ser. D, Phys. Sci. +
2-100-flowered +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
cormlike +  and fascicled +
7 cm70 mm <br />0.07 m <br /> (16 cm160 mm <br />0.16 m <br />) +
tuberlike +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
succulent +, fleshy +  and fibrous +
wing-margined +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
obpyramidal +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
bluish purple +
not persistent +
distinct +
3 +  and 6 +
not +  and veined +
straight +
1.3 cm13 mm <br />0.013 m <br /> (2 cm20 mm <br />0.02 m <br />) +
7 cm70 mm <br />0.07 m <br /> (20 cm200 mm <br />0.2 m <br />) +
persistent +
Delphinium decorum subsp. tracyi +
Delphinium decorum +
subspecies +
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 +