26 ANALYTICAL KET. 



Ovary and pod superior, i. e. free from the calyx. 



Five-celled arid 5-beaked, opening across the beaks, which 



fall off at maturity ; stamens 10. Peuthorum, in CRASSULACEJE, 176 

 Three-celled and 3-valved, or 3 - 5-celled and circumscissile. FICOIDE^:, 198 

 Two-celled or one-celled ; placentas central. 



Stamens inserted on the throat or tube of the calyx. LYTHRACE.E, 184 

 Stamens inserted o; the receptacle or the base of the calyx, 

 Alternate with the 5 sepals. . . . Glaux, in PJUMULACE^E, 331 

 Opposite the sepals when of the same number. CARYOPHYLLACE^E, 82 

 One-celled, with one parietal placenta. KANUKCULACEJE, 34 



Ovaries 2 or more, separate, simple. 



2. Ovary or its cells containing onJ>/ 1 or 2, rarely 3 or 4, ovules. 

 * Pistils more than one, anil distinct or nearly so. 



Stamens inserted on the calyx ; leaves with stipules. . . ROSACE^E, 150 

 Stamens inserted on the receptacle. 



Leaves punctate with pellucid dots. . Xanthoxylum, in RUTACE^E, 106 

 Leaves not dotted. 



Calyx present, and usually colored or petal-like. RANUNCULACE^E, 34 

 Calyx absent ; flowers entirely naked, perfect, spiked. PIPERACE^E, 446 



* * Pistil one, either simple or compound. 



Ovary parti v inferior, the calyx coherent to its lower half, 



2-celled; styles 2; stamens many. . . HAMAMELIDE^E, 179 



Ovary wholly inferior (in perfect or pistillate flowers). 



Aquatic herbs ; ovary 3-4-celled, or (Hippuris) 1-celled. HALORAGE^E, 180 

 Mostly woody plants; style or stigma one, entire ; ovary 1-celled. 



Stigma running down one side of the style. Nyssa, in CORNACE^E, 215 

 Stigma terminal, with or without a style. 



Parasitic on the branches of trees ; anthers sessile. LORANTHACE..E, 449 

 Not parasitic above ground ; anthers on filaments. SANTALACE^;, 450 

 Ovary really free from the calyx, but permanently invested by its 



tube, or the base of it, so as to seem inferior. 



Shrubs, with scurfy leaves ; flowers mostly dioecious. EI^EAGNACE^E, 448 

 Herbs, with the calyx colored like a corolla. 



Leaves opposite, simple. . ... NYCTAGINACE.E, 425 



Leaves alternate, pinnate. . . Poterium, in ROSACES, 161 



Ovary plainly free from the calyx, which is sometimes wanting. 

 Stipules (ocreffi) sheathing the stem at the nodes. 



Tree ; calyx none ; flowers monoecious, in heads. PLATANAC^E^;, 466 



Herbs ; calyx present and commonly petal-like. POLYGONACE/E, 436 



Stipules not sheathing the stem, or none. 

 Aquatic herbs, submerged or nearly so. 



Leaves whorled and dissected ; style single. CERATOPHYLLACE^:, 488 

 Leaves opposite, entire ; styles 2 ; ovary 4-cellecl. HALORAGE^, 1 80 

 Not aquatics, herbs. 



Ovary 10-celled; berry 10-seeded. . . PHYTOLACCACEJE, 435 

 Ovary 3- (rarely 1-2-) celled ; juice usually milky. EUPHORBIACE/E, 451 



