XVI SYNOPSIS OF THE NATURAL ORDERS. 



87. ROSACES (part of Tr. Sanguisorbeae). Stipules adnate to 

 the petiole. 



294. URTICACE.E. Stipules free, deciduous. Ovary 1-celled. 



295. U LMACE^E. Stipules free, deciduous. Ovary 2-celled. 



b. Stipules 0. Fl. monoecious. Perigone 0. 

 293. CERATOPHYLLACE.E. 



c. Stipules 0. Fl. hermaphrodite or polygamous. Embrvo 



straight. 



287. THYMELACE^E. Fr. a nut or drupe. Radicle superior. 

 286. EL^AGNACE^:. Fr. clothed with the berry-like perigone. 

 Radicle inferior. 



d. Stipules 0. Fl. hermaphrodite or polygamous. Embrvo 



curved or spiral. 



124. PARONYCHIACE.E (Scleranthus). Fr. inclosed in the 



hardened calyx-tube. 

 274. CHENOPODIACE^E. Cal. not hardened. Stam. from the 



base of the perianth. 

 273. AMARANTHACE^E. Cal. not hardened. Stam. hypogynous. 



C. Male flowers always in catkins. 



296. AMENTIFER^E. 



Subclass II. GYMNOSPERM^E. 



Seeds quite naked. 

 309. CONIFERS. 



Class II. MONOCOTYLEDONES. 



Wood of stem youngest at the centre. Cotyledon single. 



Subdivision I. DJCTYOGEN.E. Leaves net- veined, deciduous. 

 Floral envelopes whorled. 



311. TRILLIACE.E. Perianth inferior. 

 311. DIOSCOREACE^E. Perianth superior. 



Subdivision II. FLORIDA. Leaves parallel-veined, persistent. 

 Floral envelopes whorled. 



A. Ovaries several, each bearing a style or stigma. 



344. ALISMACE^E. Perianth 6-parted. Caps, not bursting. 

 349. POTAMOGETONACE.E. Perianth 4-parted. 

 335. COLCHICACE.E. Perianth 6 7-parted. Caps, opening at 

 the inner edge. 



