102 



HALORAGINACEAE. 



Key to genera. 



1. Aquatic herb ... ... ... ••• 2. 



Terrestrial plant 2. Haloragis. 



2. Leaves simple ... ... ••• •■• !• Callitriche. 



Leaves pianate Z. Myriophyllum. 



1.— OALLITRIOHE. 



Key to species. 



Leaves oblong-spathulate 1. verna. 



Leaves ovate 2. stagnalis. 



1. C. verna, Linn. ; Clarke in Hook. f. Fl. Brit. Ind. ii. 434. In 



a marsh on the bank of the Han River, Swatow ; Canton ; 

 Whampoa. Fl. greenish, April. 



2. C. stagnalis, Scop. ; Clarke 1. c. 434. A weed in the Botanic 



Gardens, Hongkong. Fl. greenish, May. 



2— HALORAGIS. 



Key to species. 



Leaves glabrous ... ... ... 1. micrantha. 



Leaves scabrous ... ... ... 2. tetragyna. 



1. H. micrantha, R. Br. ; Clarke in Hook. f. Fl. Brit. Ind. ii. 



430. HUls near Canton. Fl. reddish. May. 



2. H. tetragyna, Hook.f. ; H. scabra, Benth. Fl. Hongk. 139. In 



the Happy Valley and common on grassy slopes, Hong- 

 kong ; near Lowu, Hongkong New Territory. Fl. reddish, 

 June. 



3.— MYRIOPHYLLUM. 



1. M. spicatum, Linn. ; Clarke in Hook. f. Fl. Brit. Ind. iL 433. 

 Pond near Swatow. Fl. greenish, . 



RHIZOPHORACEAE. 



Key to genera. 



1. (Jalyx 4-6-merous ... ... ... 2. 



Calyx 8-14-merous 3. Carallia. 



2. Calyx 4- merous \. Kandelia. 



Calyx 5-6-merous 2. Bruguiera. 



1.— KANDELIA. 

 1. K. Rheedii, fVight et Am. ; Benth. Fl. Hongk. 110. Estuary 

 at Little Hongkong and at Taitam Tuk, Hongkong ; at 

 Taipo and near Maonshan, Hongkong New Territory. 

 Fl. white, August. 



