Classification of Plants 



207 



CLASS I. MONOCOTYLEDONS. 



A. Flowers with marked 'indefiniteness in the 



number of flower parts. 



B. Perianth as a rule absent (ACHLAMYDEOUS), 



either as a primitive condition or by 



loss of perianth formerly present in 



earlier related types ; when present ill- 



defined and consisting of bristles or 



scales. Wind pollinated. 



C. Stamens and carpels showing great varia- 



tion in number ; apocarpous, or car- 



pels more or less joined and at length 



separating ; 1-4, each i-ovuled; 



spathe wanting, aquatic or marsh 



plants. 



Perianth of bristles, flower spikes on 

 long scapes, staminate above, pistil- 

 late below ...... TVPHACE^. 



Perianth none, or tubular, or of three or 



six valvate segments ; habit various . NAIADACE^. 

 CC. Stamens usually definite, carpels syn- 



carpous. 



Seed-coat fused with ovary ; leaf sheath 

 split, ligule present .... GRAMINACE^E. 



Seed-coat free from ovary; leaf sheath 



CYPERACE^:. 



LEMNACE^E. 



not split, ligule absent 

 BB. Perianth as a rule present, or absent 

 through reduction; inflorescence sub- 

 tended by bracts ; stamens and carpels 

 as a rule definite ; usually insect pol- 

 linated. 



Plants with root stock, spathe conspicuous ARACE^E. 

 Minute floating plants, spathe incon- 

 spicuous . . . .-*'' . . 

 AA. Flowers of five whorls prevailing, each whorl 



usually 3-parted. 

 B. Perianth with sepals and petals similar 



(HOMOCHLAMYDEOUS). 



C. Perianth bracteoid or sepaloid, hypo- 



gynous. 



D. Carpels apocarpous, i-seeded, en- 

 dosperm cartilaginous, horny or 

 oily. 

 Dioecious trees with unbranched 



stems and pinnate leaves . . 

 DD. Carpels syncarpous. 



