KEY TO THE ORDERS. Izi 



Ubticace^. — Herbs. Stigma 1. Flowers montieoious or 

 dioBcious, in spikes or racemes. No chaff-like bracts 

 among the flowers. Or, Stigmas 2 ; leaves pal- 

 mately-compoimd 198 



Illecebracejb. —Herbs, small, tufted. Flowers greenish 

 or whiti.sh, terminal. Stamens as many as the 

 divisions of the 5-parted calyx and opposite them, 

 or fewer, perigynous. Sepals hooded at the top 

 and bristle-pointed. Style 2-clef t 183 



.-\ MARANTACE.,E. — Herbs. Flowers greenish or reddish, in 



&^\^&a,wilh chaff-likebracts intenspersed. Stigmas 2. 187 



Chenopodiace^. — Herbs. Flowers greenish, in spikes. 



No chaff-like bracts. Stigmas 2 184 



OLEACE.a;. — Trees. Leaves jnnnately compound. Fruit a 1- 



seeded samara 181 



0RTICAOE.E. — Trees. Leaves simple. Fruit a 1-seeded sa- , 



mara winged all round, or a drupe 198 



LatjracEjE. — Trees or shrubs. Flowers dioecious. Sepals 6, 



petal-like. Stamens 9, opening by uplifting valves. 193 



ThymeleacEjE. — Shrubs -tvith leather-like bark, and jointed 

 branchlets. Flowers perfect, preceding the leaves. 

 Style thread-like 194 



B. Flowers In catkins. 



T Sterile or staminate jlowers only in catkins. 



Jdglandace^. — Trees with pinnate leaves. Fruit a nut 



with a husk 202 



CUPULIFEB.*;. — Trees with simple leaves. Fruit one or 

 more nuts surrounded by an involucre which 

 forms a scaly cup or bur 204 



t * Both sterile or fertile flowers in catkins, or catkin-like heads. 



SALIOAOE.E. — Shrubs or low trees. Ovary 1-celled, many- 

 seeded ; seeds tufted with down at one end 209 



Platakace^. — Large trees. Stipules sheathing the branch- 

 lets. The flowers in heads 201 



Myricace^. — Shrubs with resinous-dotted, usually fra- 

 grant, leaves. Fertile flowers one under each 

 scale. Nutlets usually coated with waxy grains . . 203 



BETOLACE.9E. — Trees or shrubs. Fertile flowers 2 or 3 under 

 each scale of the catkin. Stigmas 2, long and 

 slender 207 



