175 



2.— CRAWFURDIA. 



1. C. fasciculata, Wall. ; Clarke in Hook. f. Fl. Brit. Ind. iv. 107. 

 Lofoushan. Fl. purple, September. 



3.— GENTIANA. 

 Key to species. 



1. Leaves linear or linear-lanceolate, 1 inch 



or more long ... ... ... '2. 



Leaves ovate or lanceolate, less than 



1 inch long... ... ... ... 3. 



2. Plant glabrous ... ... ... ... 1. Atkinsonii. 



Plant more or less scabrous ... ... 2. scabra. 



3. Leaves with hyaline margin, squarrose 3. squarrosa. 

 Leaves ascending ... ... ... 4. Loureiri. 



1. G. Atkinsonii, Burkill in Journ. As. Soc. Bengal, n.s. ii. 309. 



Lofoushan at 3000 ft. Fl. , August, September. 



2. G. scabra, Bunge ; Griseb. in DC. Prodr. ix. 112. Lofoushan. 



Fl. blue, September. 



3. G. squarrosa, Ledeb. ; Clarke in Hook. f. Fl. Brit. Ind. iv. 111. 



Kwangtung without locality. Fl. blue, April and May. 



4. G. Loureiri, Griseb. in DC. Prodr. ix. 108. Fanling, Hong- 



kong New Territory ; Swatow ; Kwaisin, Hoifung ; 

 abundant on grassy land, Canton. Fl. greenish outside, 

 blue or rarely rose within, April. 



4.— SWERTIA. 



1. S. vacillans, Maxim.; Ophelia vacillans, Hance in Ann. Sci. 

 Nat. ser. 5, 229. Limestone hills along the N. River ; 

 White Cloud hills, Canton ; Tingushan. Fl. whitish, July. 



5.— LIMNANTHEMUM. 



Key to species. 



1. Corolla lobes entire ... ... ... 1. cristatum. 



Corolla lobes fimbriated ... ... 2. 



2. Leaves 3-4 inches long ; flowers very 



numerous' in each axil ... ... 2. indicum. 



Leaves 1 inch long ; flowers solitary... 3. coronatum. 



1. L. cristatum, Griseb. ; Clarke in Hook. f. Fl. Brit. Ind. iv. 131. 



Near Fanling, Santin and Sanwai, Hongkong New 

 Territory ; Hoifung. Fl. white, July — September. 



2. L. indicum, Thwaites ; Clarke 1. c. 131. West River. Fl. 



white. May. 



3. L. coronatum, Dunn, sp. n., L. aurantiaco, Dalz. afiinis sed sepalis 



lineari-oblongis et coronae destributione distincta. 

 Herba aquatica, glabra, praeter foliorum laminas floresque 

 submersa. Folia fluitantia, reniformia, 1-2 cm. diam. 

 Integra, chartacea ; petioli 3-7 cm. longi, basi stipulis 

 adnatisa lata. Floras saepissime solitarii, axillares, ex aqua 



