234 



4. Smaller branches flat seeds tuber- 



culate ... 

 Smaller branches filiform seeds 

 striate ... 



5. Leaves over 1 inch long ... 

 Leaves under 1 inch long 



6. Stems simple 



Stems branched from the base . . . 



7. Styles united 

 Styles distinct 



8. Leaves truncate below ; styles con- 



nate only at base 

 Leaves cuneate below, for half 

 their length ... 



9. Leaves thin, rounded at both ends 

 Leaves thick, acute at both ends 



10. Anthers 3 ; leaves usually under 3 



inches or thin ... 

 Anthers 5 or more ; leaves coria- 

 ceous, usually over 3 inches ... 



11. Branches and leaves glabrous 

 Branches and leaves pubescent or 



hirsute... 



12. Leaves 1^ inches long ; ovary 3- 



ceUed ... 

 Leaves 3 inches long ; ovary 5- 

 ceUed ... 



13. Leaves acuminate... 

 Leaves rounded ... 



14. Leaves glabrous above ... 

 Leaves ovate, pubescent above ... 



15. Leaves obovate ... 

 Leaves oblong 



1 6. Branches and leaves softly pubes- 



cent 

 Branches and leaves glabrous ... 



17. Capsule 4 lines long ; leaves 3-4 



inches long 

 Capsule 6 lines long ; leaves 5-6 

 inches long 



6. 



14. 

 13. 



2. G. philippinense. 

 1. G. Wrightii. 



8. P. reticulatus. 

 15. 



4. G. eriocarpum, 



5. G. Fortuni. 



3. G. obscurum. 



6. G. Arnottianum. 



17. 



7. G, hongkongense. 



8. G. macrophyllum. 



1. P. urinaria, Linn. ; Benth. Fl. Hongk. 310. Hongkong 

 without locality ; fields near Yit-hai, Swatow ; garden 

 weed, Canton. Fl. July. 

 P. maderaspatensis, Linn. ; Benth. 1. c. 311. Hongkong 

 without locality. Fl. . 



P. Niruri, Linn. ; Benth. 1. c. 31 1. Wongneichong, Hongkong ; 



Macao. Fl. August. 

 P. simplex, Retz. ; Hook. f. Fl. Brit. Ind. v. 295. Hongkong 



without locality ; Yit-hai, Swatow ; Hoifung ; Lienchow 



River. Fl. April — August. 

 P. anceps, Benth. Fl. Hongk. 311. Near the Happy Valley, 



and Deepwater Bay, Hongkong. Fl. July. 



