18 



KEY TO FAMILIES. 



(Dvarv free, superior to the perianth. 



All the segments petaloid ; stamens 



6 ; anthers opening inwards ; 



fruit a 3-eelled capsule Liliace.e 50 



Outer segments green ; fruit of 

 several distinct carpels; 



aquatic plants Alismace.e 51 



Ovary adherent to the tube of the 

 perianth, inferior ; capsule 3- 

 celled, with several seeds. 



3 ; anthers opening out- 



/<f(7 



6; anthers opemng in- 



Stamens 



wards 



Stamens 



wards 



v. Perianth of herbaceous or scarious 



segments or none ; ovary free. 



Perianth of 6 scarious segments; 



stamens 6 or 3 ; style 1 with 3 



filiform stigmas; capsule 3-valved, 



many-seeded 



Perianth inconspicuous or none. 

 Flowers monoecious, sessile on a 

 fleshy axis (spadix), which is 

 enclosed in a large bract 

 (spnthe); leaves broad with 

 branching nerves ; fruit a 



berry or capsule 



Flowers in small, dry spikes, each 

 flower enclosed in small bracts 

 called glumes: leaves narrow; 

 fruit dry, 1-celled, 1-seeded. 

 Stems solid, without nodes; leaf- 

 sheaths not slit downwards ; 

 flower in the axil of 1 bract ... 

 Stems hollow and interrupted by 

 nodes ; leaf-sheaths slit down- 

 wards ; flower enclosed in 2 

 bracts 



IridacEvE 52 / ^3 

 Amaeyllidace« 53 /j }- 



JrNCACE.E 54 /* V 



Aeace-e 55 



Cyperace.e 56 



Gramine* 57 ^^^ 



