■24 



229. Ovary 2-celled ; fruit a 1-seeded 



nut, on a cup or in a capsule- 

 like involucre ; tree ; no al- 

 bumen... 



230. Tree or erect shrub 

 Herb or climber ... 



231. Stem woody, solid 



Stem hollow 



232. Perianth none 

 Perianth segments 6 



233. Leaves plicate or pinnatisect 

 -Leaves not plicate or pinnatisect 



234. Climber 



Not a climber 



235. Tendrils present 



Tendrils absent ... 



236. Leaves pinnatisect, parallel-veined 

 Leaves not pinnatisect, net-veined 



237. Flowers not in dense spikes 

 Flowers in spathes in dense spikes 



(spadices) 



238. Perianth 4-merous ... 

 Perianth 6-merous 



239. Leaves parallel-veined, falcate ... 

 Leaves net-veined, not falcate ... 



240. Leaves paraUel-veined, or none ... 

 Leaves net-veined 



241. Ovary superior 

 Ovary inferior 



242. Perianth regular or nearly so 

 Perianth irregular or none 



243. Perianth petal- or calyx-like 

 Perianth petal- and calyx-like ... 



244. Perianth petal-like 



Perianth calyx-like 



245. Perianth of 4 or 6 segments 

 Perianth of 2 segments 



246." Flowers in dense heads, perianth 

 segments transparent and very 

 small ... ... 



Flowers not in dense heads, and 

 perianth segments not trans- 

 parent and very small 



247. Flowers proceeding from middle of 



petiole 



Flowers not proceeding from 

 middle of petiole 



248. Ovary apocarpous 

 Ovary syncarpous 



249. Perianth of six segments 

 Perianth 



250., Floating plant 



N(3h-floating plant "... 



Amentaceae (p. 251). 



231. 



234. 



232. 

 Gramineae (p. 307). 

 Pandanaceae (p. 287). 



233. 

 Palmae (p. 285). 

 Liliaceae (p. 277). 



235. 



24". 



236. 



237. 

 Palmae (p. 285). 

 Liliaceae (p. 277). 



238. 



Araceae (p. 287). 

 Roxburghiaceae (p. 276). 



239. 

 Liliaceae (p. 277). 

 Dioscoreaceae (p. 276). 



241. 

 Araceae (p. 287). 



242. 



253. 



243. 



249. 



244. 



248. 



245. 

 Juncaceae (p. 285). 



246. 

 Philydraceae (p. 282). 



Eriocaulonaceae (p. 291). 



247. 



Pontederiaceae (p. 281). 



Liliaceae (p. 277). 

 Alismaceae (p. 290). 

 Commelinaceae (p. 282). 

 Xyridaceae (p. 282). 



250. 



251. 



252. 



