Full name and orig. publication: Ancylostemon Craib, Notes Roy. Bot. Gard. Edinburgh 11: 233, 257 (Nov. 1919).

Etymology: From the Greek άγκύλη, ankylē = bend, crook, and σήμων, stēmōn = thread, filament, alluding to the bend at top of the filaments.

Infrafamilial position: Didymocarpoid Gesneriaceae - "Advanced Asiatic and Malesian genera" (Weber 2004).

Description: Perennial, acaulescent rosette herbs. Leaves with long, pubescent petiole, lamina ovate, elliptic, elliptic-ovate or lanceolate, coarsely dentate, crenate or serrulate, pubescent on both surfaces. Cymes umbelliform, sometimes reduced to solitary flowers; bracteoles linear, villose. Sepals free to base or fused to about half, puberulous outside, lobes linear-lanceolate or triangular. Corolla tubular, purple, reddish-orange or yellow-whitish, bilabiate; upper lip 2-lobed or undivided, lower lip 3- or rarely 5-lobed. Stamens 4, didynamous, glabrous; filaments inserted at or above middle of corolla tube; anthers coherent. Nectary annular. Ovary cylindrical, glabrous or puberulous; style linear; stigma bifid. Capsule slender cylindrical, glabrous, dehiscence loculicidal.

Chromosome number: 2n = 34.

Species number: 12.

Species names (incl. publication and synonyms): See Skog, L.E. & J.K. Boggan. 2005: World checklist of Gesneriaceae:

Type species: Ancylostemon concavus Craib

Distribution: C & S China (Hubei, Sichuan, Guizhou, Yunnan, Guangxi, Shanxi). 

Ecology: Occurring in forests and forest margins, in wet places and on rocks within forests; 1100-3800 m.

Selected references: Burtt & Davidson, Notes Roy. Bot. Gard. Edinburgh 21: 215-216 (1954); W.T.Wang et al. in Wu & Raven (eds.), Fl. China 18: 268-272 (1998), reg. rev.; Y.Z.Wang & Gu, Acta Phytotax. Sin. 37: 137-142 (1999), karyol.

Bibliography: See Skog, L.E. & J.K. Boggan. 2005. Bibliography of the Gesneriaceae. 2nd edition:


Ancylostemon concavus Craib, type species

Ying T.S. et al., The endemic genera of seed plants of China, Fig. 103 (1993), with permission.


Ancylostemon aureus (Franch.) B.L.Burtt var. aureus

Li Z.Y & Wang Y.Z., Plants of Gesneriaceae in China, Fig. 1.41 (2004); with permission.


Ancylostemon mairei var. emeiensis K.Y. Pan

Li Z.Y & Wang Y.Z., Plants of Gesneriaceae in China, Fig. 140 (2004); with permission.


Ancylostemon saxatilis (Hemsl.) Craib

Li Z.Y & Wang Y.Z., Plants of Gesneriaceae in China, Fig. 1.43 (2004); with permission.


last modified: 2007-06-12