54 

 4.— AVERRHOA. 



1. A. Carambola, Linn. ; Benth. Fl. Hongk. 56. At Little Hong- 

 kong ; Macao ; Sanning ; Lienchow Eiver. Fl. pink, 

 July. 



5.— IMPATIENS. 



Key to species. 



1. Spur spiral 



Spur straight or curved 



2. Leaves truncate at base, subsessUe ... 

 Leaves stalked ... 



3. Petioles with large glands 



Petioles naked or with setaceous glands 



4. Leaves serrate ... 

 Leaves crenate ... 



5. Sepals minute ; leaves deeply serrate... 

 Sepals ^ inch long ; leaves serrulate ... 



cochleata. 



2. 

 chinensis, 



3. 

 obesa. 



4. 



5. 

 plebeja. 

 Balsamina. 

 crassicornu. 



1. I. cochleata, Lour. ; Balsamita cochleata, DC. Prodr. i. 666. 



Cultivated at Canton. Fl. red, . 



2. I. chinensis, Linn. ; Benth. Fl. Hongk. 55. In a swamp near 



Chaiwan Gap, Hongkong ; near Sanwai, Hongkong New 

 Territory ; stream near Chaochaufu, Swatow ; Hoifung ; 

 Sanning ; Lienchow River ; Lof oushan. Fl. pink, 

 Summer. 



3. I. obesa, Hook. f. in Nouv. Arch. Mus. Hist. Nat. Paris, 4° 



ser. X. 242. Lienchow River. Fl. purple and yellow, 

 August. 



4. I. Balsamina, Linn. ; Hook. f. Fl. Brit. Ind. i. 453. Macao. 



Fl. white, pink or red. Summer. 



5. I. plebeja, Hemsl. Enum. PI. China i. 101. Lofoushan. Fl. 



6. I. crassicornu, Hook. f. in Hook. Ic. PI. t. 2916. Mt. Pakwan, 



near Canton. Fl. . 



RUTACEAE. 



Key to genera. 



1. Ovary deeply 2-5-lobed, cells 2-ovulate 

 Ovary entire 



2. Leaves opposite 

 Leaves alternate 



3. Leaves compound 

 Leaves simple ... 



4. Cells many-ovuled 

 Cells 1-2-ovuled 



5. Stamens 2-5 

 Stamens 8-10 ... 



6. Petals valvate ... 

 Petals imbricate 



10. 



6. 



2. 



3. 

 Eeodia. 

 Zanthoxylum. 



5. 



4. 

 Citrus. 



9. 

 Toddalia. 



6. 

 Micromelum. 



7. 



