88 



3. Leaflets blunt, emarginate 3. emarffinata. 



Leaflets acuminate ... ... ••• *■ 



4. Calyx i-inch long 4:. semicastrata. 



Calyx 1-inch long 5. Fordiana. 



1. 0. pachycarpa, Champ. ; Benth. Fl. Hongk. 96. Causeway 



Bay, East Point, Mt. Victoria and elsewhere, Hongkong ; 



Tin-tso-ngam, Hongkong New Territory; near Canton. 



Fl. whitish, June. 

 2 0. mollis, Dunn in Journ. Bot. 1909, 198. Lienchow Kiver. 



Fl. . . , ^ 



3. 0. emarginata, Benth. Fl. Hongk. 96. Common m the Happy 



Valley woods and other parts of Hongkong ; Ng-chung- 

 shan, Hongkong New Territory. Fl. white, June. 



4. 0. semicastrata, Hance in Journ. Bot. 1882, 78. Wongnei- 



chong, Hongkong. Fl. white, April. 



5. Fordiana, Oliver in Hook. Ic. PI. t. 2422. At Shapchaikam 



on the North-west River. Fl. white ?, July. 



51.-CAESALPINIA. 



Key to species. 



1. Pod prickly ... ... ... ... 2. 



Pod unarmed ... ... ... ... 3. 



2. Stipules spiniform ; petals white and 



purple ; pod 7-seeded \. Minax. 



Stipules membranous ; petals yellow ; 



pod 1-2-seeded 2. Bonducella 



3. Leaves with few pinnae ... ... 3. Nuga. 



Leaves with many pinnae ... ... 4. 



4. Primary pinnae more numerous than 



secondary ... ... ... ... 5. 



Primary pinnae less numerous than 



secondary ... ... ... ... 4. Milletlii. 



5. Leaflets ovate, acute, coriaceous ... 5. vernalis. 

 Leaflets oblong... ... ... ... 6. 



6. Leaflets subcoriaceous, attached by 



angle ... ... ... ... 6. Sappan. 



Leaflets membranous, attached by 



centre of base ... ... ... 7. sepiaria. 



1. C. Minax, Hance in Journ. Bot. 1884, 365. At Castle Peak, 



Hongkong New Territory ; Shiuhing on the North River. 

 Fl. white and purple, April. 



2. C. Bonducella, Fleming ; Guilandina Bonducella, Linn. ; 



Benth. Fl. Honk. 96. Stonecutters' Island and Repulse 

 Bay, Hongkong ; Castle Peak, Hongkong New Territory ; 

 Pakhoi. Fl. yellow, August. 



3. C. Nuga, Ait. ; Benth. 1. c. 97. Colnmon in ravines on Hong- 



kong Island ; Tairaoshan, Hongkong New Territory ; 

 river banks near Chaochaufu. Fl. yellow, April. 



4. C. Millettii, Hook. et Am.; Walp. Rep. i. 8 10. Macao. Fl. . 



5. C. vernalis, Champ. ; Benth. Fl. Honk. 97. Common in 



ravines in Hongkong. Fl. golden yellow, April. 



