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FOC | Family List | FOC Vol. 16 | Boraginaceae | Onosma

2. Onosma cingulatum W. W. Smith & Jeffrey, Notes Roy. Bot. Gard. Edinburgh. 9: 112. 1916.

昭通滇紫草 zhao tong dian zi cao

Onosma tsiangii I. M. Johnston.

Herbs annual, yellow-green, 50-70(-150) cm tall, densely yellow hispid, reflexed white pubescent. Stems single, not branched. Basal leaves oblanceolate, 5-10 × 0.5-1.2 cm, abaxially densely strigose and sparsely hispid, adaxially densely hispid, hairs discoid at base, base attenuate into petiole, apex obtuse; stem leaves lanceolate or ovate-lanceolate, 4-7 × 1-2 cm, base rounded, apex acute. Inflorescences terminal and axillary, forming a large panicle; bracts linear-lanceolate to lanceolate, 0.5-2 cm × 2-7 mm, densely yellow hirsute and sparsely white strigose. Pedicel pendulous or recurved, slender, 1-1.5 cm, densely hispid. Flowers widely spaced. Calyx 6-8 mm, to 1.2-1.4 cm in fruit, parted nearly to base; lobes linear-lanceolate. Corolla red, tubular-campanulate, 7-9 mm, ca. 1.5 mm wide at base, gradually expanded upward, densely short strigose above middle outside, glabrous inside except for nectaries; throat 4-5.5 mm wide; nectary ringlike, ca. 0.5 mm, villous; lobes broadly triangular, ca. 1 × 2-2.5 mm, margin revolute. Filaments subulate, 2.5-3.5 mm, inserted ca. 2.5 mm above base in corolla tube; anthers united at base, ca. 4 mm, included. Nutlets black, ca. 2.5 mm, shiny. Fl. Jul.

* Rocky slopes, thickets, meadows; 2000-2800 m. Yunnan

Onosma tsiangii differs from typical O. cingulatum by having fewer patent bristles on the leaf blade, calyx not yellow when dry, basal tubercles on stem bristles, and shorter hairs on leaf blade abaxially. These characteristics indicate that the taxon should be treated either as a variety or only as a later state of development. Sparse bristles and basal tubercles are characteristic of a later stage of development throughout the Boraginoideae.


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