XX ARTIFICIAL KEY TO THE NATURAL ORDERS. 



2. Calyx-tube adherent to the ovary, at least to its lower half. 



Stamens nnre or less united together. Tendril-bearing herbs. CUCURBITAC EJE, 188 



Stamens distinct. Not tendril bearing. 

 Orules and seeds more than one in each cell. 



Ovary 1-celled, many-ovuled from the base. PORTULACACEJB, 63 



Ovary 1-celled, with 2 or 3 parietal few - many-seeded placentae. Some SAXIFRAGACE,, 141 



Ovary 2 - 5-celled. [and GROSSULACE^G, 136 



Anthers opening by pores at the apex. Style 1. MELASTOMACE2E, 127 



Anthers opening lengthwise. 



Style 1. Petals 4, rarely 2. ONAGRACE^, 129 



Styles 2, rarely 3, or one and 3 - 5-deft. SAXIFRAGACE.&, 141 



Ovules and seeds only one in each cell. 



Stamens (in perfect flowers) inserted on the tube of the calyx. 



Stipules deciduous. Pod 2-beaked. HAMAMELACEJE, 147 



Stipules present or deciduous. Fruit globular, fleshy. POMEJS, 123 



Stipules none. ONAGRACEJE, 129 



Stamens inserted on a disk which crowns the top of the ovary. 



Styles 2. Herbs. Flowers umbelled. Fruit dry UMBELLIFER^I, 148 



Styles 2 -5. Flowers umbelled. Fruit fleshy. ARALIACE^., 159 



Style 1. Shrubs or trees. Flowers clustered. CORNACEJfi, 161 



DIVISION II. MONOPETALOUS : calyx and corolla both present ; the 

 latter with its petals united more or less into one piece. 



A. Stamens more numerous than the lobes of the corolla. 

 * Ovary compound, 3 - many-celled, or \-celled with the ovules rising from the base. 



Stamens free or nearly free from the corolla, distinct. ERICACEAE, 245 

 Stamens borne on or adherent to the base of the tube of the corolla. 



Filaments wholly distinct. Calyx wholly free from the ovary. EBENACE^, 266 

 Filaments 1 - 6-adelphous below : anthers 2-celled. 



Calyx adherent to the base or to the whole surface of the ovary. STYRACACEJE, 265 



Calyx wholly free from the ovary. CAMELLIACE.&, 70 



Filaments monadelphous in a column : anthers 1-celled. MALVACEjE, 66 



* * Ovary compound, \-celled, with 2 parietal placenta. FTJMARIACE^, 26 



* * * Ovary simple, with 1 parietal (sutural) placenta. LEGUMINOS2E, 38 



15. Stamens (i. e. fertile stamens) as many as the lobes of the corolla, and opposite them. 



Ovary 5-celled. Corolla appendaged with scales inside. SAPOTACE.33, 267 



Ovary 1-celled : utricle 1-seeded. Styles 5. PLUMBAGINACE^, 270 



Ovary 1-celled : pod several - many-seeded. Style 1. PRIMULACILE, 270 



C. Stamens as many as the lobes of the corolla and alternate with them, or fewer. 



* Ovary adherent to the calyx-tube (inferior). 

 Stamens united by their anthers into a ring or tube. 



Flowers collected in a head which is furnished with an involucre. COMPOSITE, 177 



Flowers separate, perfect, irregular. Corolla cleft down one side. LOBELIACE^, 241 



Flowers separate, monoecious or dioecious, regular. CUCURBITACEJE, 138 



Stamens separate. 



Leaves alternate, without stipules. Juice milky. Pod 2 - 5-celled. CAMPANULACEJE, 243 

 Leaves opposite with intervening stipules, or whorled without them. RUBIACILE, 168 



Leaves opposite without stipules. 



Flowers not involucrate. Stamens 4 or 5. Corolla 4 - 5-lobed. CAPRIFOLIACEJE, 163 

 Flowers not involucrate. Stamens 2 or 3. Corolla 5-lobed. YALERIANACFJE, 174 



Flowers in an involucrate head. Stamens and corolla-lobes 4. DIPSACB^E, 176 



