656 



SYSTEMATIC BOTANY. 



Ovules solitary, or very few. 

 Flowers naked. 



Carpel single Myricaceee.' 230. 



•Carpels double CallitrichiacecB. 217. 



Flowers in an involucre. 

 Anther-valves recurved 

 Antlier-valves slit. 

 Embrj'o on the outside of the albumen 

 Embryo enclosed in the albumen . 

 Flotvers hermaphrodite. 



Embryo in a vitellus PiperacecE, 190. 



Embryo without a vitellus .... Podosteinacea:. 1 



. Alherospermacece . 201, 



MonimiiicecB. 202. 

 Euphorbiacete. 218. 



2. Monochlamydeous Flowers. 



Ovary inferior, or partially so. 

 (. Leaves stipulate. 



1. Flowers hermaphrodite AristolochiacecB . 223. 



2. Flowers unisexual. 



Fruit cupulate Corylacece. 229. 



Fruit naked. 



Many-seeded Begoniacete. 204. 



One-seeded A^-tocarpacece. 213. 



I. Leaves exstiputate. 



1. Flowers hermaphrodite. 



Ovary 3— 6-celled. Ovules numerous . . Aristolochiacets. 223. 

 Ovary 1-celled. Ovules definite. 

 Ovules with a naked nucleus . . . Loranthacece. 225. 

 Ovules with a coated nucleus. 

 Calyx valvate. Embryo straight . . Santalacece. 224. 

 Calyx imbricated. Embryo curved . Chenopodiacece. 183. 



2. Flowers unisexual. 

 Amentaceous. 



Leaves alternate Myricaceee. 230. 



Leaves opposite. 



Simp le leaves Garryacece. 227. 



Compound leaves Juglandacece . 228. 



N it amentaceous. 



Seeds nutnerous, parietal .... liatiscaceee. 205. 



Seed solitary, axile Helwingiacece. 226. 



Ovary superior. 

 ;. Leaves stipulate. 



1 . Flowers hermaphrodite. 



a. Carpels solitary. 



Stipules ochreate PolygonaceiB. 180. 



Stipules distinct Petiveriacece. 188. 



b. Carpels more than one combined into a solid 



pistil. 

 Seeds exalbuminous. 



Calyx imbricated Vlmacece, 209. 



Calyx induplicate ChaillttiacetB. 20S. 



Seeds albuminous. 



Styles or stigmas 1. Leaves usually dotted. Samydaceee. 206. 



Styles or stigmas 2. Leaves not dotted . Vlmacece. 209. 



2. Flowers unisexual. 

 a. Carpels solitary. 



Cells of anther perpendicular to the filament Stilaginacece. 215. 

 Cells of anther parallel to the filament. 

 Embryo straight. 

 Sap watery. Stipules small. Seeds al- 

 buminous Urticacete. 210. 



Sap milky. Stipules large. Seeds ex- 

 albuminous Arlocai'pace^. 213. 



Embryo hooked. 



.Sap watery. Seeds without albumen . Cnnnahinacece. 211. 

 Sap milky. Seeds with albumen . . Moracea. 212. 



