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FOC | Family List | FOC Vol. 18 | Gesneriaceae | Briggsia

18. Briggsia rosthornii (Diels) B. L. Burtt, Notes Roy. Bot. Gard. Edinburgh. 22: 306. 1958.

川鄂粗筒苣苔 chuan e cu tong ju tai

Plants stemless. Petiole 1-8(-13) cm, densely rust-brown to yellowish villous; leaf blade ovate to lanceolate, rarely elliptic, 2-13 X 1.2-7 cm, white pubescent, abaxially rust-brown villous along veins, base sometimes oblique, cordate to cuneate, margin crenate to serrate, sometimes double so, apex obtuse to acute; lateral veins 3-7 on each side of midrib, conspicuous. Cymes 1-4(-8)-flowered; peduncle 3.5-20 cm, rust-brown glandular villous; bracts 2, lanceolate to linear, 2-7 X 1-3 mm, outside rust-brown villous, inside glabrous, margin entire. Calyx segments lanceolate, rarely elliptic to obovate or lobed, 3-9 X 1.2-3 mm, outside villous, margin entire, obscurely 3-5-veined. Corolla white to pale pink, purple, or purple-red, inside deep red or purple-red spotted, 2.8-5 cm, outside sparsely pubescent, inside sparsely pubescent; tube 2.3-3.3 X 1-2 cm; adaxial lip 4-8 mm, lobes semiorbicular to narrowly lanceolate, 1-6 X (1-)2-6 mm, apex obtuse; abaxial lip 1.1-2 cm, lobes oblong, 7-9 X 5-8 mm, apex obtuse. Adaxial stamens adnate to corolla ca. 4 mm above base, 1-1.5 cm, abaxial ones adnate to corolla 4-5 mm above base, 1.4-2 cm; filaments pubescent; anthers reniform, thecae confluent; staminode 1-2.2 mm. Pistil ca. 2 cm, glandular puberulent. Style 2-5 mm. Capsule 5-6.5 cm, sparsely puberulent to glabrescent. Fl. Aug-Sep, fr. Sep-Oct.

* Shady, damp rocks under bamboo forests; 1000-2300 m. Guizhou, Hubei, Sichuan, Yunnan.

1 Cymes 1-flowered; peduncle 7-9.3 cm   18b var. crenulata
+ Cymes 1-4(-8)-flowered; peduncle 3.5-20 cm.   (2)
2 (1) Corolla ca. 2.8 X 1-1.5 cm, lobe apex acute   18d var. xingrenensis
+ Corolla 3.2-5 X 1.5-2 cm, lobe apex obtuse.   (3)
3 (2) Leaf blade ovate to lanceolate, rarely elliptic, 2-13 X 1.2-7 cm; peduncle 3.5-20 cm; corolla pale pink to purple or purple-red, inside deep red or purple-red spotted, upper lip 2-lobed, lobes semiorbicular, ca. 2 X 1-1.2 mm   18a var. rosthornii
+ Leaf blade ovate, 3.3-7.5 X 1.6-2.3 cm; peduncle 16.3-18.6 cm; corolla white, inside purple spotted, upper lip 2-sect from base, lobes suborbicular, 5-6 X ca. 6 mm   18c var. wenshanensis

Lower Taxa


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