XVI SYNOPSIS OF THE NATURAL ORDERS. 



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

 the petiole. 



294. UrticacejB. Stipules free, deciduous. Ovary 1-celled. 



295. Ulmace^. Stipules free, deciduous. Ovary 2-celled. 



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

 293. Ceratophyllace^. 



c. Stipules 0, Fl. hermaphrodite or polygamous. Embryo 



straight. 

 287. Thymei,ace.s;. Fr. a nut or drupe. Radicle superior. 

 286. El^agnacb^. Fr. clothed with the berry-like perigone. 



Radicle inferior. 



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



curved or spiral. 

 124. Paeonychiace« (Scleranthus). Fr. mclosed in the 



hardened calyx-tube. 

 274. Chenopodiace^. Cal. not hardened. Stam. from the 



base of the perianth. 

 273. Amaranthace^. Cal. not hardened. Stam.hypogynous. 



C. Male flowers always in catkins. 



296. Amentiper^. 



Subclass II. GYMNOSPERMiE. 

 Seeds quite naked. 

 309. Conifers. 



Class II. MONOCOTYLEDONES. 



Wood of stem youngest at the centre. Cotyledon single. 



Subdivision I. Dictyogen^. Leaves net- veined, deciduous. 

 Floral envelopes whorled. 



311. TRiLLlACB.flE. Perianth inferior. 

 311. D10SCOREACE.B. Perianth superior. 



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

 Floral envelopes whorled. 



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

 344. AlismacejE. Perianth 6-parted. Caps, not bursting. 

 349. PoTAMOGETONAOE^. Perianth 4-parted. 

 336. CoLCHiCACE*:. Perianth 6 — 7-parted. Caps, opening at 

 the inner edge. 



