KEY TO NATURAL ORDERS. 



CLASS II. ENDOGENOUS OR MONOCOTYLEDONOUS PLANTS. Stem not 

 distinguishable into bark, wood and pith. Leaves mostly parallel- veined and 

 sheathing at base. Parts of the flower usually in threes. Embryo with a 



ARACE.E, 



TYPHACE.E, 



844 



347 



ALISMACE^E, 



347 



BROMELIACEJE, 349 



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

 Herbs. The small and crowded flowers either 



naked or with a small perianth. 



Spadix with a large spathe surrounding it. 1 



Flower generally naked : fruit a berry, f 

 Spadix without a spathe. Perianth of 6 j 



pieces. J 



Spadix without any proper spathe: perianth 



none ; fruit an akene. 



2. Flowers not on a spadix, but variously disposed, having a calyx and 

 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 many, in a ring or head, forming 



akenes. 

 Pistil 1, 3-celled, many - several-seeded : 



style one. 

 Slender scurfy-leaved plants, growing on 



trees. 



Of mostly 6 petal-like 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. e., on 

 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.E, 

 Anthers turned inwards, i. e., on the 

 inner side of the filament : style 1 : 

 stigmas 1-3. LILIACEJE, 



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

 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. JUNCACE.E, 358 



Glume one to each flower, the flower in its axil. 



Flowers collected into heads or spikes. CYPERACE^E, 358 



Glumes 2 - 4 to each flower, of 2 sorts, GRAMINEJS. 



350 



351 



