ANALYTICAL KEY TO THE NATURAL ORDERS. Ixix 
Stamens 5-adelphous or in 5 clusters : anthers 2-celled. Tiliacete , 
Stamens distinct, as many as the petals and sepals. Limnanthacea , 
Calyx imbricated in the bud. 
Stamens mono-diadelphous. Flower papilionaceous. Polygalaceee, 
Stamens cohering over the stigma. Flower irregular. Balsaminacea, 
Stamens monadelphous next the base. Flower regular. 
Styles 5, cohering with a long-beaked axis. Geraniacea, 
Styles 5, separate. Pod 5- 10-cel led, 10-many-seeded. 
71 
76 
87 
76 
73 
72 
75 
Stamens 5. Leaves simple, entire. Linacece, 
Stamens 10. Leaves 3-foliolate, obcordate. Oxalidacea, 
Stamens 3-5-adelphous. Leaves opposite, entire. Y 
Stamens distinct, polyandrous. > Hypericacece, 51 
Leaves sessile, opposite, entire, dotted. j 
Leaves long-petioled. Petals indefinite. Nymphteacea , 
Leaves forming hollow pitchers. Petals 5. Sarraceniacete, 
Stamens distinct, tetradynamous. Pod 2-celled (silique). Crucifera, 
Stamens distinct, definite (10 or under). 
Seeds 1 - 2 in each cell. 
Leaves pellucid-dotted. Samara winged. Zanthoxylacete, 
Leaves dotless, opposite, compound or lobed. 
Samara double, winged at the apex. Aceracea, 
Pod leathery, round, 2-3-valved. Hippocastanacea ?, 
23 
24 
30 
77 
79 
81 
Leaves dotless, alternate. Drupe 4-6-celled. Aqnifoliacea, 275 
Seeds many or several in each cell of the capsule. 
Styles or sessile stigmas 2-3. Flowers minute. Elatinacea, 55 
Style 1. (Anthers mostly opening by pores.) Ericacea, 256 
Div. II. MONOPETALOUS. Petals united in a corolla of one piece. 169 
1. Calyx adherent to the ovary. 
Stamens syngenesious. 
Flowers in an involucrate head (compound flower). Composite , 184 
Flowers separate, perfect, irregular. Pod many-seeded. Lobeliaceee, 253 
Flowers separate, monoecious or dioecious. Cucurbitacece, 144 
Stamens distinct, definite, inserted on the corolla. 
Fruit with only one (fertile) cell, 1-seeded. 
Stamens 3. Flowers cymose. Valerianacea, 181 
Stamens 4. Flowers in an involucrate head. Dipsaceee, 183 
Fruit 2 -5-celled, 2 - many-seeded. Leaves opposite. 
Leaves with intervening stipules, or whorled. Rubiacete, 175 
Leaves destitute of stipules. Caprifoliacece, 169 
Stamens distinct, definite, inserted with the corolla. 
As many as its lobes. Campanvlacete, 255 
Twice as many as its lobes. Vacciniea, 256 
2. Calyx free from the ovary. 
* Stamens twice as many as the lobes of the regular corolla. 
Flowers perfect. Style one. Ovary 3-5-celled. Ericaceee, c Z56 
Flowers polygamous. Styles 4. Ovary 8-celled. Ebenacete, 277 
* * Stamens as many as the lobes of the regular corolla. 
-*-And opposite them. Ovary 1-celled. 
Utricle 1-seeded, in a scarious and plaited calyx. Plumhaginacea, 279 
Pod several - many-seeded : placenta central. Primulace.ee , 280 
AI tern ate with them. 
Stamens hypogynous, or slightly cohering to the base of the corolla. 
Pod 3-5-valved, 3-5-celled, many-seeded. Ericacea, 256 
Drupe 4- 6-seeded, berry-like. Aquifoliacea , 27o 
Stamens inserted on the tube of the corolla. 
Ovary strictly compound, 2-5 celled, several-ovuled : styles united. 
