Left: Ying T.S. et al., The endemic genera of seed plants in China, Fig. 112 (1993); with permission.
Right: Li Z.Y & Wang Y.Z., Plants of Gesneriaceae in China, Fig. 1.263 (2004); with permission.
Full name and orig. publication: Petrocodon Hance, J. Bot. 21: 167 (June 1883).
Etymology: From the Greek πετρος, petros = rock, stone, and κωδων, kōdon = bell, “the bell of the rocks.”
Synonyms: -
Infrafamilial position: Didymocarpoid Gesneriaceae - "Advanced Asiatic and Malesian genera" (Weber 2004).
Description: Perennial rosette herbs with stout vertical rootstock. Leaves petiolate, oblong to lanceolate, marigin entire or dentate, both surfaces strigose. Cymes long-pedunculate, with several to many flowers in subumbellate arrangement; bracteoles linear. Sepals free nearly to base, linear-lanceolate. Corolla white, funnel-shaped or urceolate-campanulate, with 5 nearly equal, triangular lobes. Stamens 2; filaments inserted near base of corolla tube; anthers coherent; staminodes 3. Nectary annular. Ovary slender cylindrical; stigma inconspicuous. Capsule slender cylindrical, 2-valved, loculicidally dehiscent. Seeds tubercled.
Chromosome number: Unknown.
Species number: 2 [Petrocodon dealbatus Hance (with 2 varieties), P. ferrugineum Y.G.Wei]
Type species: Petrocodon dealbatus Hance
Species names (incl. publication and synonyms): See Skog, L.E. & J.K. Boggan. 2005: World checklist of Gesneriaceae: http://persoon.si.edu/Gesneriaceae/Checklist.
Distribution: China (N Guangdong, N Guangxi, Guizhou, S & W Hunan, SW Hubei, SE Guizhou).
Ecology: Growing on rocks in valleys, 200-1000m.
Selected references: Wang et al. in Wu & Raven (eds.), Fl. China 18: 348 (1998).
Bibliography: See Skog, L.E. & J.K. Boggan. 2005. Bibliography of the Gesneriaceae. 2nd edition: http://persoon.si.edu/Gesneriaceae/Bibliography.
Illustrations:
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Petrocodon dealbatus Hance, type species
Left: Ying T.S. et al., The endemic genera of seed plants in China, Fig. 112 (1993); with permission. Right: Li Z.Y & Wang Y.Z., Plants of Gesneriaceae in China, Fig. 1.263 (2004); with permission. |
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Petrocodon dealbatus Hance, type species Li Z.Y & Wang Y.Z., Plants of Gesneriaceae in China, Figs. 1.264 and 1.262 (2004); with permission. |
last modified: 2007-07-13