Delphinium caeruleum Jacquem. ex Cambess.

Stem 5--80 cm tall, puberulent or pilose, sometimes also with glandular hairs, usually branched. Leaf blade 0.4--12 cm wide, adaxially densely puberulent or velutinous, base cordate; primary lobes separate for at least 90% of blade radius; central lobe rhombic or obovate-rhombic, 1--3 × dissected, distally 1- or 2-lobulate or undivided, apex rounded to acute; ultimate lobules linear, 2--5 mm wide; proximal leaves withered or not. Corymb 5--14 cm, 1--7-flowered, finely puberulent; proximal bracts leaflike or 3-sect, distal ones linear. Pedicels 3.5--8 cm; bracteoles borne near middle of pedicel or distally, lanceolate-linear, 4--10 mm. Sepals purple-blue, rarely white, abaxially puberulent; spur subulate, 1.5--2.8 cm, nearly straight or slightly recurved, base 2--3(--4) mm in diam.; other sepals 1.2--1.9(--2.5) cm. Petals undivided, glabrous. Staminode limb broadly obovate or suborbicular, entire or emarginate, yellow barbate. Filaments glabrous or pilose. Carpels 4 or 5; ovaries puberulent or villous. Fl. (Jun--)Jul--Oct.

Himalaya (Kunawar to Bhutan), S.E. Tibet.

Gansu, Qinghai, W Sichuan, NW Yunnan, Xizang [Bhutan, Nepal, Sikkim].

3000-5800 m

Grassy or gravelly slopes; 2100--5000 m.

Flowering from July to September.

Delphinium caeruleum var. caeruleum is close relative of Delphinium caeruleum var. majus, but differs from the latter in its proximal leaves present at anthesis (vs. absent), cauline leaf blade to 8 cm wide (vs. 12 cm), ultimate lobules 2-3 mm wide (vs. 2.5-5 mm).

Delphinium caeruleum is occurring in Gansu, Qinghai, W Sichuan, NW Yunnan, Xizang of China, Bhutan, Nepal.

Stem 8-60 cm tall, appressed puberulent, without glandular hairs, usually branched. cauline leaf blade to 8 cm wide, apically acute, adaxially densely puberulent or velutinous, base cordate; primary lobes separate for at least 90% of blade radius; central lobe rhombic or obovate-rhombic, 1-3 × dissected, distally 1-2-lobulat, apex acute; ultimate lobules linear, 2-3 mm wide; Proximal leaves present at anthesis; Corymb 5-14 cm, 1-7-flowered, finely puberulent; proximal bracts leaflike or 3-sect, distal ones linear. Pedicels 3.5-8 cm; bracteoles borne near middle of pedicel or distally, lanceolate-linear, 4-10 mm. Sepals purple-blue, rarely white, abaxially puberulent; spur subulate, 1.5-2.8 cm, nearly straight or slightly recurved, base 2-4 mm in diameter; other sepals 1.2-2.1 cm. Petals undivided, glabrous. Staminode limb broadly obovate or suborbicular, entire or emarginate, yellow barbate. Filaments glabrous or pilose. Carpels 4 or 5; ovaries puberulent; Spur 1.8-2.8 cm, base 2-3 mm in diameter.

The chromosomal number of Delphinium caeruleum is 2n = 16 (Yang, 1996).

Growing in grassy or gravelly slopes; 2100-4000 m.

Delphinium caeruleum là một loài thực vật có hoa trong họ Mao lương. Loài này được Jacquem. mô tả khoa học đầu tiên năm 1841.

蓝翠雀花（学名：Delphinium caeruleum）为毛茛科翠雀属的植物。分布在锡金、尼泊尔、不丹以及中国大陆的西藏、青海、四川、甘肃等地，生长于海拔2,100米至4,000米的地区，见于山地草坡以及多石砾山坡，目前尚未由人工引种栽培。