281 



1. D. Leschenaultianum, Z). Don?; Hance in Journ. Bot. 1887, 



13. Lofoushan. Fl. white, May. 



2. D. sessile, D. Don ; Baker in Journ. Linn. Soc. xiv. 589. 



Taimoshan, Hongkong New Territory. Fl. white, March. 



3. D. pullum, Salisb. ; Hook. f. Fl. Brit. Ind. vi. 360. Whampoa, 



cultivated ; Lienchow Kiver. Fl. greenish-purple, April. 



19.— PARIS. 



1. P. polyphylla, Sm. ; Hook. f. 1. c. vi. 362. Lantao Island on 

 rocks at 1500 ft., Hongkong New Territory ; top of the 

 Phoenix Mt., Swatow ; Lofoushan, Fl. greenish-yellow, 

 February. 



SO.— VERATRUM. 



1. V. nigrum, Linn. ; Baker in Journ. Linn. Soc. xvii. 472. Mt. 

 Parker north, Hongkong ; Lantao Island, Hongkong New 

 Territory. Fl. dark purple, August. 



PONTEDERIACEAE. 



Key to genera. 



Plant floating, with inflated petioles ... 1 . Eichornia. 

 Plant not floating ... ... ... 2. Monochoria. 



1.— EICHORNIA. 



E. speciosa, Kunth ; E, crassipes, Solms in DC. Monogr. Phan. 

 iv. 527. Cultivated in Hongkong and Canton ; Swatow ; 

 abundant in ditches about Macao. Fl. pale blue. Summer. 



S.— MONOCHORIA. 



1. 



2. 



3. 



1. M. hastaefolia, Presl; Hook. f. Fl. Brit. Ind. vi. 362. Hong- 



kong New Territory without locality; Hoifung; Whampoa; 

 Fatshan; NorthwestEiver; Lofoushan. Fl. blue, September. 



2. M. vaginalis, Presl ; Benth. Fl. Hongk. 374. Common in 



swamps, Hongkong ; Hoifung ; Szetseshan, Sanning. 

 Fl. blue, June to September. 



3. M. ovata, Kunth, Enum. PI. iv. 665. Canton. Fl. . 



