i66 CLASSIFICATION 



is a comparatively small group, and seldom met with 

 in the plains of India, excepting in gardens. 



The Angiospermia are divided into two classes, 

 namely, (i) Dicotyledons, which bear two opposite 

 cotyledons in their embryo the radicle of which 

 usually elongates into a tap-root in germination, and 

 which have usually reticulate leaves, flowers with 

 5-merous or 4-merous, or 2-merous symmetry, and 

 open fibrovascular bundles arranged in the stem 

 and in the root in the form of a ring; and (2) Mono- 

 cotyledons, which bear only one cotyledon in their 

 embryo or occasionally two alternate cotyledons 

 (never opposite) the radicle of which usually remains 

 undeveloped and throws out a large number of fibrous 

 roots in germination, and which have usually thick 

 underground stems, non - reticulate parallel - veined 

 sheathing leaves, flowers with 3-merous symmetry, 

 and closed fibrovascular bundles scattered irregularly 

 in the stem and the root. 



The Classes Dicotyledons and Monocotyledons are 

 subdivided into Sub-classes, the first into four and the 

 second into three. 



Class I.— DICOTYLEDONS 



Sub-class I, TlialamiflorcB, in which the flowers 

 are usually complete and hermaphrodite, corolla poly- 

 petalous, calyx inferior, corolla and stamens hypo- 

 gynous, and ovary superior. 



Sub-class 2, Calyciflorce, in which the flowers are 

 usually complete and hermaphrodite, corolla poly- 

 petalous, calyx gamosepalous, inferior or superior, 

 corolla and stamens either perigynous or epigynous, 

 ovary superior or inferior. 



Sub-class 3, Gamopetalce or CorolliflorcB, in which 



