XV111 ARTIFICIAL KEY TO THE NATURAL ORDERS. 



Ovary compound, 1 - 5-celled, when 1-celled the 2 - several placentae parietal. 

 Sepals persistent, 4 - 7 in number. 



Leaves punctate with transparent or dark dots, all opposite. HYPERIC A.C EM, 48 



Leaves not punctate, all or some of them alternate. 



Ovary and pod not lobed, 1-celled or partly so : ovules orthotropous. CISTACEJE, 45 



Ovary and pod 3 - 7-horned or lobed, 1-celled, opening early. RESEDACEJS, 41 



Ovary and pod 5-celled. Style umbrella-shaped. SARRACENIACE^E, 23 



Sepals caducous, only 2 or 3. Juice milky or colored. PAP AVERAGES, 24 



Sepals deciduous, 5 in number, valvate in the bud. TILIACEJE, 69 



* * Stamens united with the base of the (hypogynous) petals. 



Calyx valvate in the bud. Stamens monadelphous : anthers 1-celled. MALVACILS!, 65 



Calyx imbricated in the bud. Anthers 2-celled. Trees or shrubs. CAMELLIACEJ2, 70 



* * * Stamens and petals inserted on the calyx (perigynous). 



Leaves alternate, with stipules. Pistils 1 - few-seeded. ROSACES, 110 



Leaves opposite, no stipules. Calyx-tube enclosing the ovaries. CALYCANTHACE^i, 126 



2. Calyx more or kss coherent with the surface of the ovary ; i. e. ovary inferior or partly so. 

 Leaves with stipules, alternate. Pomese in ROSACES, 110 



Leaves without stipules. (In Cactaceae there are no proper leaves.) 

 Ovary 1-celled, with parietal placentae. 



Fleshy and leafless plants : sepals and petals many, and much alike. CACTACE^i, 136 

 Rough-leaved plants : calyx-lobes 6 : petals 5 or 10. LOASACEJS, 135 



Ovary 1 - 5-celled more than half free from the calyx, with a many -seeded placenta in the 



axis : pod circumcissile, the upper part falling off as a lid. PORTDLACACEJ3, 63 

 Ovary 2-celled, half free : styles 2 : pod 2-beaked, 2-seeded. HAMAMELACE2E, 147 



Ovary 3 - 4-celled (style 1) with 1-4 ovules in the axis of each cell. STYRACACEai, 265 

 Ovary 3 -5-celled (styles separate at the top) : ovules and seeds very numerous on pla- 

 centae projecting from the axis. Philadelphus in SAXIFRAGACK3E, 141 

 Ovary and berry-like pod 10 - 30-celled, many-seeded on the partitions. N YMPELEACEJB, 22 



B. Stamens of the same number as the petals, and opposite them. 



Pistils 3 -6, separate. Flowers dioecious. Woody vines. MENISPERMACE.ZE, 18 



Pistil only one : ovary 1-celled. 



Style or stigma 1, simple : anthers opening by uplifted valves. BERBERIDACILE, 19 



Stylo and stigma 1 : anthers opening lengthwise. PRIMULACE.E, 270 



Styles 5. Calyx funnel-form, dry. Ovule and seed solitary. PLUMBAGINACK3E, 270 



Style 3-cleft at the apex. Calyx 2-leaved. Seeds few. PORTULACACE^E, 63 



Pistil only one : ovary 2-4-celled. 



Calyx very short, 4 - 5-toothed, or the limb obsolete. Petals valvate. TITACILaE, 77 



Calyx 4 -5-cleft, valvate in the bud Petals involute. RHAMNACEJE, 78 



C. Stamens when of the same number as the petals alternate with them, sometimes twice at 



many, sometimes fewer. 

 1. Calyx free from the ovary. 



* Leaves punctate with transparent (or sometimes blackish) dots. 



Flowers perfect. Leaves entire and simple, opposite. HYPERICACEJE, 48 



Flowers dioecious or polygamous. Leaves compound or divided. KUTACE^E, 74 



* * Leaves not punctate with transparent dots. 



t- Pistils one or more, simple, i. e. of one carpel. 



Stamens inserted on the receptacle {hypogynous). Stipules none. 



Flowers dioecious. Fruit a drupe. Woody climbers. MENISPERMACUffi, 18 



Flowers mostly perfect. Herbs, rarely somewhat shrubby plants. RANUNCULACEJ3, 2 

 Stamens inserted on the base or tube of the calyx (perigynous). 



Flower mostly papilionaceous or otherwise irregular. Pistil only one. LEGUMINOSJ3, 88 

 Flower regular. Pistils 1 - several. 



