271 



3. Inflorescence from the side of the 



petiole 

 Inflorescence not from the side of the 

 petiole 



4. Flowers appearing before the leaves ... 

 Flowers not appearing before the leaves 



5. Leaves suborbicular, subsessile 

 Leaves elliptic-lanceolate, petiolate ... 



6. Inflorescence radical ... 

 Inflorescence cauline ... 



7. Leaves 3 or 4 inches long 

 Leaves 6 inches long or more ... 



8. Lip suborbicular, 2-3 inches across ... 

 Lip not suborbicular, less than 2 inches 



across 



9. Three staminodes petaloid, equal and 



linear 

 One staminode formed into a lip, two 

 others much smaller 



6. Phrynium. 



4. 



2. Curcuma. 



5. 

 1. Kaempferia. 

 5. Alpinia. 



3. Zingiber. 



7. 



1. Kaempferia. 



8. 



4. Costus. 



9. 



7. Canna. 



5. Alpinia. 



1.— KAEMPFERIA. 

 Key to species. 



Leaves cauline 

 Leaves radical 



1. coenobialis. 



2. Galanga. 



1. K. ooeno'bialis, C H. Wright ; Monolophus coenobialis, Hance in 



Journ. Bot. 1870, 75. North Eiver. Fl. yellow, August. 



2. K. Galanga, Linn. ; Hook f. Fl. Brit. Ind. vi. 219. Whampoa, 



near Canton. Fl. white and lilac, . 



S.— CURCUMA. 



1. 0. pallida, Lour. Fl. Cochinch, 9. 

 yellow, . 



3.— ZINGIBER. 



Key to species. 



1. Spike sessile or nearly so 

 Spike not sessile 



2. Leaves glabrous on both sides 

 Leaves pubescent on under side 



3. Flowers in a slender, lax spike 

 Flowers in a dense, stout spike 



4. Leaves 1 inch wide 

 Leaves 2-4 inches wide 



Canton. Fl. whitish 



1, Z. 



2. Z. 



2. 

 3. 



1. striolatum. 



2. confine. 



3. integrilabrum. 



4. 



4. op,cinale, 



5. Zerumbet. 



North River. 



striolatum, Diels in Engl. Jahrb. xxix. 262. 



Fl. whitish, November. 

 confine, Miq. Journ. Bot. N^erl. i. 94. Cult, near Fookwing, 



Canton Eiver near Hongkong ; Kwangtung without 



locality, Fl. , December. 



