Abstract
This thesis is to study habit, tuber, stem, leaf, flower and fruit morphology, phytogeography, and phenology in Dioscorea. Finally, concerns are given to the infrgeneric taxonomy.
Plants of Dioscorea in Taiwan are scandent vine; underground tuber or rhizome cylindrical, pyriform or spherical; steme terete or quadrangular in cross-section, ridged, or winged, green or violet, pubscent or glabrous or prickly; aerial tuber axilly or absent. Leaves alternate or opposite, simple or palmately- compound; simple leaves cordate or ovate-triangular, 3-9 nerved; leaflets of palmately-compound leaves lanceolate or ovate, nerves pinnately; 3-9 nerved; veinlets reticulate; petioles twisted and dilated at base. Flowers usually dioecious, arranged in axillay panicles, racemes, or spikes; male flowers solitary or fasciled on rachis, perianths 6, 2-whorled, tepals mostly similar, stamens 6, sometimes the inner 3 sterile, filaments attached to base of perianths, anthers 2 celled, longitudinally dehiscent, pistillodium rudimentary, present or absent; pistillate flowers solitary on rachis, perianths similar to the staminate, with 0, 3 or 6 staminodia; ovary inferior, trigonous, 3-celled, ovules 2 in each cell; stigmas 3, 2-lobed at apex. Fruit capsulate, tripterous. Seed 2 in each cell, with membranous wing. Flowering period is from April to September. Mostly fruiting from July to November. Most species of the genus in Taiwan are widely spreading in the island. Among the species in Taiwan, two endemic.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0612100-220316 |
| Date | 12 June 2000 |
| Creators | Liao, Chun-Kuei |
| Contributors | Ho-Yi Liu, Yun-Po Yang, Chang-Sheng Kuo |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0612100-220316 |
| Rights | withheld, Copyright information available at source archive |
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