X^n 



ARTIFICIAL KEY TO THE NATURAL ORDERS. 



Glaux in PRIMULACE^, 270 

 CARYOPHYLLACEiE, 52 



Zanthoxylum in KUTACE^, 74 



CALLITRICHACEJE, 384 



EUPHOIlBIACEiE, 386 



PHYTOLACCACE^, 361 



EMPETRACEJE, 393 



RHAMNACEiE, 78 

 ULMACE^, 394 



ACERINEJE, 82 

 OLEACE^, 356 



Placenta in the axis or the base of the cell. 

 Stamens 5, alternate with the 5 sepals. 

 Stamens opposite the sepals when of the same number. 



* * Ovary or its cells corUainmg only lor 2 {rarely 3) ovules. 

 M- Pistils more than one^ and distinct or nearly so. 

 Stamens inserted on the calyx. Leaves with stipules. ROSACEA, 110 



Stamens inserted on the receptacle. 

 Leaves punctate, with pellucid dots. Ovaries stalked. 

 Leaves not dotted. 

 Calyx present, usuaUy colored or petal-like. BANUNCULACE^, 2 



Calyx absent. Flowers entirely naked, but perfect, spiked, SAURURACE^, 383 



■t- ■*- Pistil one^ compound : ovary 2 - IQ-celled. 

 OvMy coherent with the calyx-tube (inferior), 3-4-celled. HALORAGE^, 129 



Ovary free. (Calyx sometimes wanting.) 

 Herbs, aquatic. Fruit 4-celled, indehiscent, nut-like : styles 2. 

 Herbs. Fruit splitting into 2 or 3 two-valved pods. 

 Herbs. Fruit a 10-celled and 10-seeded berry. 

 Heath-like undershrubs. Drupe 3 - 9-ceUed, 

 Shrubs or trees. Fruit a berry -like drupe or a samara. 

 Ovule solitary in each cell, erect. Stq^ens alternate with the sepals. 

 Ovule solitary in each cell, suspended. 

 Ovules a pair in each cell ; these 

 Horizontal or ascending. Fruit a double samara. 

 Suspended or pendulous. Fruit a single samara or a drupe. 



■*- -1- ■*- Pistil one (simple or compound), 1-celled, 1-seeded, 

 Ovary coherent with the calyx-tube. 

 Stigma extending down the whole length of one side of the style; 

 Stamen 1. Aquatic herbs. Seed suspended. Hippuria In HALORAOE.^, 129 



Stamens 5 - 10. Trees. Seed suspended. Nyssa in CORNACE^, 160 



Stigma terminal, with or without a style. 

 Anthers 3-4, sessile. Woody parasites on trees. LORANTHACEiE, 382 



Anthers 5, on filaments. SANXALACE.ai, 381 



Ovary free, sometimes enclosed in the calyx-tube, but not adherent to it. 

 Stipules forming closed sheaths at the joints. 

 Calyx conspicuous, often colored or petal-like. Herbs. 

 Calyx none. Trees : flowers in heads. 

 Stipules not sheathing, often none. 

 Stamens 8-24, more numerous than the lobes of the calyx. 

 Anthers opening by uplifted valves. Leaves pellucid-dotted. 

 Anthers opening lengthwise 

 Shrubs, with dotless and silvery-scurfy leaves. 

 Shrubs, with entire and dotless leaves. 

 Aquatic herbs, with finely dissected leaves. 

 Stamens 1-6, equalling or fewer than the calyx-lobes. 

 Embryo colled around the outside of the albumen. 

 Flowers scarious-bracted. 

 Flowers not Bcarious-bracted. 

 Calyx colored, imitating a monopetalous corolla. 

 Calyx herbaceous or scarious. 

 Embryo coiled or bent, without albumen. ^ 

 Embryo straight in the axis of albumen. [ 

 Radicle superior. Style and stigma 1. ) 

 Radicle inferior. Stigmas 3, two-cleft. 

 Embryo straight : albumen none. 

 Flowers polygamous. 

 Flowers perfect. Stamens on the calyx. 



P0LYG0NACE.3E, 371 

 PLATANACEiE, 400 



LATJRACE^, 378 



EL.aEAGNACB^, 380 



THYMELACE^, 380 



CERATOPHVLLACEiE, 383 



AMARANTACEiE, 367 



NYCTAGINACE^, 360 

 CHENOPODIACE^i:, 361 



URTICAOE^, 394 



EUPHORBIACE.^, 335 



Ptonera, &c. in URTICACE^, 394 



ROSACEA, 110 



