24 



KEY TO XATUPvAL OKDEES. 



Aeace^, 344 



Class II. Exdogexous or Moxocotyledoxous I'laxts. Stem nol 

 distinguishable into hark, ^vood and pith. Leaves mostlj paraUel-veined and 

 sheathing at base. Pai'ts of the fiovser usually in threes. Embryo with a 

 single cotyledoji. 



1. Mowers densely crowded on a spadix with or without a spathe. 

 Herbs. The smaU and crowded flowers either 



naked or with a small perianth. 



Spadix with a large spathe surrounding it. "] pag^. 



Mower generally naked : fruit a berry. 

 Spadix without a spathe. Perianth of 6 



pieces. J 

 Spadis without any proper spathe : perianth. 



none ; fruit an akene. TTPHACEiE, 347 



2. Flowers not on a spadis, but variously disposed, having a calyx anl 

 corolla, or a 6-leaved or 6-lobed (rarely 4-lobed) perianth colored and 

 corolla-like. 



Perianth not adherent to the ovary, and 



Of 3 greenish sepals and 3 distinct and colored 

 petals. 



Pistils manv, in a ring or head, forming 



akenes. " Alismacks:, 347 



Pistil 1, o-ceUed, many - several-seeded : 



style one. 



Slender scurfy-leaved plants, growing on 



trees. BROiiELiACE^, 349 



Of mostly 6 petal-hke leaves in 2 ranks, 3 out- 

 side and 3 inside, or else 6- (rarely 4-) 

 lobed, all colored alike. 



Stamens 6, or as many as the divisions 

 of the perianth, all alike. 



Anthers turned outward, i. g., cn 

 the outer side of the filament. 

 Leaves alternate with side ten- 

 drils, netted-veined between 

 the ribs. Flowers dioecious : 



styles or sessile stigmas 3. Smilace^, 350 

 Anthers turned inwards, i. e., on the 

 umer side of the filament : style 1 : 



stigmas 1-3. ' Liliace.e, 3o1 ' 



3. Flowers not on a spadix and without any colored or corolla-hke 

 perianth, but having glumes, i. e. , husk-like or scale-like bracts. Stems rush* 

 like or straw-like. 



Glumes 6 in a whorl to each flower, like a calyx. Juxcace^, 358 



Glume one to each -flov/er, the flower in its axQ. 



Flowers collected into heads or spikes. Cyperace^, 358 



Glumes 2-4 to each flower, of 2 sort& Gramixile. 



