SYNOPSIS OF NATURAL OEDERS> 



Class I. DICOTYLEDONS. 



Stem when woody consisting of pith surrounded with concentric 

 layers of wood and bark. Leaves net veined. Flowers often 5-merou9, 

 Embryo with 2 cotyledons^ rarely more ; radicle forming a tap-root. 



Division 1. ANGIOSPERMS. 



Ovules in a closed vessel and fertilized through a stigma. Embryo 

 usually with 2 cotyledons only. 



Sub-Class I. POLYPETALiE. 



Calyx and corolla present. Petals several, distinct, rarely united or 

 wanting. 



A. Thalamiflorse. — Torus small or elongate^ rarely disciform. 

 Ovary superior. Stamens usually indefinite, hypogynous. 



1. RanaleS. — Stamens usually indefinite. Carpels distinct, free, 

 or immersed singly in the torus, rarely connate below. Aljoumen 

 often copious ; embryo relatively small. 



Petals and sepals in a single series. 



1. BanunculacecB, — Herbs or climbing shrubs. Leaves alternate or 

 opposite. Sepals deciduous. Stamens indefinite. Seeds without an 

 arillus. 



2. DiUeniacece. — Trees or shrubs. Leaves alternate, simple; lateral 

 veins prominent. Sepals persistent. Carpels usually distinct. Seeds 

 with an arillus. ^ 



Petals or sepals, or both, in two o** more series. 



3. MagnoliacecB. — Shrubs or trees. Leaves alternate, simple ; sepals 

 and petals trimerous, imbricated, deciduous. Stamens indefinite. Carpels 

 distinct. Albumen uniform. 



4. Anonacece. — Trees or shrubs, often scandent, Leaves alternate, 

 simple. Stipules 0. Sepals 3. Petals 6, in 2 series of 3 each. Stamens 

 indefinite, Carpels distinct in fruit, (united in Anona). Albumen 

 ruminate, 



5. Menisjoermacece. — Climbing or twining shrubs. Leaves alternate, 

 simple. Stipules 0. Flowers small, unisexual, deciduous, usually 

 trimerous. Stamens definite, free, or connate, opposite the petals. 

 Embryo usually curved. 



