XXXVl 



INTRODUCTION. 



Ovule and seed solitary. Leaves stipulate. 

 Stipules slu'Jithiiig. lA-aves altiTiiate. 

 Stipules scariouH. Leaves opposite. 

 Stipule.s uot stieatliing' nor scarious. 

 Flowers perfect Aclicnium 2-lobed, spiny. 

 Flowers imperfect, 

 llerbs. Stems twining. Leaves 3 - 5-lobed. 



Stems not twining. Leaves serrate or entire. 

 Trees or slirubs. 



Juice watery. Flowers single or clustered. 

 Juice milky. Flowers included in a fleshy receptacle, 

 Ovule and seed solitiiry. Leaves witliout stipules. 

 Stamens more numerous than the calyx-lobes. 

 Anthers opening by valves. 

 Anthers opening lengthwise. 

 Oalyx 5 - 6- parted. 

 Calyx entire. Berry oval. 

 Stamens equalling in number or fewer than the calyx-lobes. 

 Flowers with scarious bracts. 

 Flowers without scarious bracts. 

 Calyx corolla-like, plaited. 

 Calyx herbaceous. Styles 2. 

 Ovary 2-12-celled. 

 Leaves whorled 

 A heath-like shrub Calyx of imbricated scales. 

 A prostrate aunuaL Calyx corolla-like. 

 Leaves opposite 

 Fruit a single samara. Calyx minute, persistent. 

 >ruit a double samara Calyx deciduous. 

 Fruit a drupe. 



Flowers perfect. Stamens on the calyx. 

 Flowers dioecious. Stamens hypogynous. 

 Fruit a many-seeded capsule. Uerbs. 

 Leaves alternate 

 Ovules and seeds 1 - 2 in each cell. 

 Flowers mono-dioecious. Fruit a drupe or capsule, 

 Flowers polygamous Capsule 3 - 4-winged. 

 Flowers perfect or polygamous. 

 Fruit a berry. Calyx colored. 

 Fruit a samara. Leaves stipulate. 

 Ovules and seeds numerous in the cells. 

 Capsule 3-celled Flowers solitary. 

 Capsule 5-ceUed Flowers cymose. 



POLVOONACEJJ, 

 ILLECEBREJi, 



884 



PETIVERlEiE, 374 



cannabinace.;e, 



UKTICACEiE, 



ulmace.t:, 



MORACEjE, 



414 

 411 



416 

 414 



LAURACE^, 398 



POLYGONACE.T.. 

 TIIYMELEACE.E, 



384 

 395 



AMARAXTACE^, 378 



NYCTAGINACE.E 

 CUEXOPODLiCEiE, 



EMPETRACE.^, 

 MOLLUGINE.E, 



372 

 375 



410 



45 



FRAXINEJE, 



ACERACE.S;, 



RHAMNACE.E, 



FOKESTIEKE.E. 



LYTHRACE.1!:, 



72 

 369 

 1.33 



ErPIIOUBlACE.E, 

 SAI'INDACE.E, 



PUYTOLACCACE-E, 

 ULMACEiE, 

 Capsule circumscissile. 



POUTULACACE.i;, 

 CKASSULACEiE 



374 

 416 



43 

 149 



Subclass II. GY^INOSPERMOUS EXOGENOUS PLANTS. 



Ovules naked (not contained in an ovaiy), supported by an open scale 

 or leaf, or else terminating a branch, and fertilized by the direct applica- 

 tion of the pollen. 



Stem branching. Leaves simple. 



Stem simple, palm-like. Leaves pinnate. 



COXIFERiE 431 

 CYCADACE^, 437 



