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Delphinium carolinianum subsp. virescens (Nutt.) R.E. Brooks  
Family: Ranunculaceae
Carolina larkspur
[Delphinium albescens Rydb., moreDelphinium carolinianum subsp. penardii (Huth) M.J. Warnock, Delphinium penardii Huth, Delphinium virescens Nutt., Delphinium virescens subsp. penardii (Huth) Ewan, Delphinium virescens var. macroceratilis (Rydb.) Cory, Delphinium virescens var. penardii (Huth) L.M.Perry]
Delphinium carolinianum subsp. virescens image
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Michael J. Warnock in Flora of North America (vol. 3)
Roots without elongate central axis; fascicles 2-8, ± horizontal. Stems 50-80 cm. Leaves mostly cauline at anthesis; distalmost petioles more than 5 mm. Leaf blade with 5 or more major divisions; ultimate lobes of midcauline leaf blades 5-15, width 2-6 mm. Flowers: sepals white to very pale blue. 2 n = 16. Flowering late winter-early summer. Prairies, sandy, loamy, or clay soils; 250-2000 m; Man.; Colo., Iowa, Kans., Minn., Mo., Nebr., N.Dak., Okla., S.Dak., Tex., Wis. Delphinium carolinianum subsp. virescens is known to hybridize with D . madrense and with D . wootonii .

Vascular plants of NE US and adjacent Canada
Stem 4-12 dm, finely and often densely pubescent, often or usually glandular; lvs chiefly basal or below the middle of the stem, deeply dissected into linear segments mostly 2-5 mm wide; raceme elongate, virgate, the lower pedicels seldom over 1.5 cm; fls white, greenish- white, or bluish-white; spur 10-14 mm; upper pair of pet sometimes yellow; lower pet bifid, bearded; follicles 15-20 mm; seeds wingless, densely covered with projecting scales; 2n=16. Prairies and plains; N.D., s. Man., Minn., and w. Wis., s. to Ill., La., Tex., Colo., and N.M., and e. occasionally into c. Ky. and nw. Ga. May-July. (D. penardii) Perhaps better treated as a var. of D. carolinianum.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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Delphinium carolinianum subsp. virescens
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