272 



3. Z. integrilabrum, Hance in Journ. Bot. 1882, 80. On the 



ledge of a rock on Mt. Gough, Hongkong. FI. , 



April to October. 



4. Z. officinale, Rose ; Baker in Hook. f. Fl. Brit. Ind. vi. 246. 



Lienchow River ; widely cultivated in Kwangtung. Fl. 

 green and purple, October. 



5. Z. Zerumbet, Rose. ; Baker in Hook. f. 1. c. 247. Taitam Tuk, 



and Deepwater Bay. Hongkong ; Tingushan on the West 

 River. Fl. white, with pale yellow lip, July. 



4.— OOSTUS. 



1. C. speciosus, Sm. ; Baker in Hook. f. 1. c. 249. North River. 

 FJ. white, August. 



5.— ALPINIA. 

 Key to species. 



1. Leaves radical ... ... ... ... 1. pumila. 



Leaves cauline ... ... ... ... 2. 



2. Flower bud enclosed in a large mem- 



branous bracteole ... ... ... 7. 



Flower bud not enclosed in a large 



membranous bracteole ... ... 3. 



3. Flowers more than 1 inch long ... 4. 

 Flowers less than 1 inch long ... 5. 



4. Lip full 1 inch long, base not spurred 3. oxyphylla. 

 Lip more than 1 inch long, base spurred 4. calcarata. 



5. Bracts scarious and persistent ... 5. stachyodes. 

 Bracts not scarious and persistent ... 6. 



6. Flowers nearly 1 inch long ... ... 8. 



Flowers 8 lines long ... ... ... 7. chinensis. 



7. Leaf margin densely downy ... ... 2. nutans. 



Leaves quite glabrous ... ... ... S. formosana. 



8. Flowers in a panicle ... ... ... 6. Galanga. 



Flowers in a raceme ... ... ... 'd. japonica. 



1. A. pumila, Hook.f. Bot. Mag. t. 6832. Lofoushan. Fl. pink, 



April. 



2. A. nutans, Rose. ; Benth. Fl. Hongk. 348. In ravines of Mt. 



Victoria, Mt. Gough, Sheko, and elsewhere, Hongkong ; 

 Lamtsun, Hongkong New Territory ; Liu-ng, Swatow. 

 Fl. whitish pink with a yellow and crimson lip, April. 



3. A. oxyphylla, Miq. in .lourn. Bot. Neerl. i. 93. Hoan. Fl— 



4. A. calcarata, Rose. ; Baker in Hook. f. Fl. Brit. Ind. vi. 254. 



Hongkong without locality. Fl. greenish white with lip 

 spotted and striped with yellow. May. 



5. A. stachyodes, Hance in Journ. Linn. Soc. xiii. 126. In the 



Happy Valley woods, and Mt. Gough, Hongkong. Fl. 

 whitish. May. 



6. A. Galanga, Willd. ; Benth. Fl. Hongk. 348. Victoria Peak, 



and Deepwater Bay, Hongkong ; White Cloud hills, 

 Canton. Fl, white with purple lip, June, 



