Protologue Description: 4. Delphinium collinum Ewan sp. nov.

D. Parryi Gray var. subglobosum Munz, Bull. S. Calif. Acad. Sci. 31:61 1932, in part, as to "san felipe" and "Campbells" citations.
Slender, erect perennial, 30-70 cm. high, from a slender woody-fibrous rootstock; stem simple or as often branching, commonly bluish, glabrous and glaucous; leaves predominantly basa, of 3 principal sublinear divisions these again divided into few to several shorter, linear, subfiliform, mucronulate teeth, the cauline reduced or inconspicuous, puberulent when young, glabrous in age or nearly so, petioles dilated at base, the lower 8-10 cm. long; racemes elongat, open or early interupted, the lowermost branches distant; flowers on ascending or spreading pedicels 8-20 mm. long, their sepals dark blue or purplish but bright, oval, rounded or barely acute , 9-12 mm. long, essentially glabrous, the uppermost and spur with finr puberulence or with finely pubescent median band, the upper petals light blue or pallid, the lower petals emarginate (sinus 1 mm. deep), blue purple, moderately white-villous; follicles oblong, venulose, 12-14 (rarely 10 or 15) mm. long, with prominent cusp, often darker; seeds 2-2.5 mm. long, the white crepe pellicle commonly impressed on the faces to form irregular wing-like angles.
Herba perennis caulibus strictis gracilibus, 30-70 cm. altis, e radice tenui lignosa, simplicibus vel saepe ramosis, caesiis, glabris glaucisque; foliis imprimis ad caulis basim confertis, tripartitibus, sementis sublinearibus dvisis dentatis brevioribus linearis ac subfiliformis, mucronulatis; caulibus inconspicuis, omnibus primum puberulentis deinde glabris, inferiorum petiolis 8-10 vel 12 cm. longis; racemis elongatis atque patentibus, ramis inferioribus remotis divaricatis; floribus pedicellis divaricatis vel arcuatis, 8-20 mm. longis, elatis, sepalis atro--caeruleis tamen lucidis, ovalibus, obtusis vel subacutis, 9-12 mm. longis, extus glabris vel ad medium villosulis, petalis superioribus azurreis vel fere albidis, inferioribus emarginatis, subniger, albo-villosis; folliculis oblongibus, 12-14 (rarissime 10 vel 15) mm. longis, cuspide prominentiore ornatis, venulosis, seminibus 2-2.5 mm. longis, integumentis niveis saepe impressis irregulariter angulatis similiter alatis.

TYPE: Ridge betw. Campbells Ranch and Mason Valley, San Diego County, Calif., Epling and Robison 4 IV 1932. (Univ. Calif. at Los Angeles Herb.) Isotypes to be distributed.
Rocky slopes of canyon spurs and ridges, assocaited with Encelia farinosa, Krameria canescens, Fouquiria and Fagonia of desert scrub, along the western margin of the Colorado Desert of San Diego County.