28 ANALYTICAL KEY. 



DIVISION IQ. APETALOUS : corolla (and sometimes calyx) wanting. 



A* Flowers not in catkins. 

 1. Ovary or its cells containing many ovules. 



Ovary and pod inferior (i. e. calyx-tube adherent to the ovary), 



Six-celled: stamens 6-12 ARISTOLOCHIACE^E, 403 



Four-celled: stamens 4 Ludwigia, in ONAG RACEME, 176 



One-celled, with parietal placentae. Chrysosplenium, in SAXIFRAGACE^E, 163 

 Ovary and pod wholly naked (there being no calyx), 



Two-celled, 2-beaked : flowers capitate : tree. . . HAMAMELACE^J, 173 

 Two-celled, many-ribbed : aquatic herb. . . PODOSTEMACE^E, 429 

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

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



fall off at maturity : stamens 10. Penthorum, in CRASSULACE^J, 171 

 Three -5-celled, opening round the middle. Sesuvium, in PORTULACACE^, 97 

 Three-celled and 3-valved. . . Mollugo, in CARYOPHYLLACEJB, 87 

 Two-celled or one-celled : placentae central. 



Stamens inserted on the throat or tube of the calyx. LYTHRACE.E, 182 

 Stamens inserted on the receptacle or the base of the calyx, 

 Alternate with the 5 sepals. . . Glaux, in PRIMULACE^J, 313 

 Opposite the sepals when of the same number. CARYOPHYLLACE^J, 87 

 One-celled, with one parietal placenta. ) 

 Ovaries 2 or more, separate, simple. } ' ' ^KUNCULACE^, 34 



2. Ovary or its cells containing only 1 or 2, rarely 3 or 4, ovules. 

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



Stamens inserted on the calyx. Leaves with stipules. . . ROSACES, 146 

 Stamens inserted on the receptacle. 



Leaves punctate with pellucid dots. . Zanthoxylum, in KUTACE^, 109 

 Leaves not dotted. 



Calyx present, and usually colored or petal-like. RANIINCULACE^EJ, 34 



Calyx absent. Flowers entirely naked, perfect, spiked. SAURURACE^;, 427 



* * Pistil one, either simple or compound. 



rary partly inferior, the calyx coherent to its lower half, 



2-celled : styles 2 : stamens many. . . . HAMAMELACE^J, 173 

 rary wholly inferior (in perfect or pistillate flowers). 



Aquatic herbs : ovary 3-4 celled, or (Hippuris) 1 -celled. HALORAGE^E, 174 

 "Woody plants : style or stigma one, entire : ovary 1 -celled. 



Stigma running down one side of the style. Nyssa, in CORNACE^:, 199 

 Stigma terminal, with or without a style. 



Parasitic on the branches of trees : anthers sessile. LORANTHACE^E, 426 

 Not parasitic above ground : anthers on filaments. SANTALACE^G, 425 



