Ill 



CUCUEBITACEAE. 



Key to genera. 



1. Leaves compound 

 Leaves simple ... 



2. Petals fringed ... 



Petals entire 



3. Lower part of male calyx closed with 



scale 

 Calyx open 



4. Male calyx-tube short, campanulate 

 Male calyx-tube narrower than long 



5. Male calyx-tube contracted above 

 Male calyx-tube cylindric 



6. Petals caudate ... 

 Petals obtuse ... 



7. Stamens inserted below mouth of calyx 

 Stamens at the calyx mouth ... 



8. Leaves 3-lobed or flowers subtended by 



large boat-shaped bracts ... 

 Leaves pahnatipartite ... 



9. Petioles longer than the leaf auricles 

 Petioles shorter than auricles ... 



11. Hemsleya. 

 2. 



1. Trichosanthes. 



3. 



5. Thladiantha, 

 4. 

 6. 

 5. 



2. Gymnopetalum. 



' 9. 

 10. Actinostemma. 

 7. 

 8. 



3. Luffa. 



4. Momordica. 

 9. Melothria. 

 8. Mukia. 



7. Zehneria. 



4. 



1 .—TRICHOSANTHES. 



Key to species. 



Seeds compressed 



Seeds turgid with a central zone 



Leaves scabrid above 



Leaves smooth ... 



Leaves with 3-5 shallow lobes ... 2. 



Leaves deeply 5-7-lobed ... ... 3. 



Bracts lanceolate, moderate sized ... 4. 

 Male racemes ebracteate or with 

 minute bracts 



2. 



4. 



Kirilowii. 



3. 



japonica. 



cucumerina. 



himalensis. 



5. cucumeroides. 



1. T. Kirilowii, Maxim. ; Cogn. in DC. Monogr. Phan. iii. 370. 



On Mt. Kellet, Hongkong ; Sanning ; North River ; 

 Lofoushan. Fl. white, August. 



2. T. japonica, Regel ; Cogn. 1. c. 371. Lienchow River. Fl. 



white, August. 



3. T. cucumerina, Linn. ; Cogn. 1. c. 357. Customs' Pass, Hong- 



kong New Territory. Fl. white, summer. 



4. T. himalensis, Clarke in Hook. f. Fl. Brit. Ind. ii. 608. At 



Little Hongkong and near the Buddhist Temple, Causeway 

 Bay, Hongkong ; Yaumati and Lantao Island, Hong- 

 kong New Territory. Fl. white, August. 



5. T. cucumeroides, Maxim. ; Bryonia cucumeroides, Ser. in DC. 



Prodr. iii. 308. Hongkong without locality. Fl. white 

 Summer. 



