20 ANALYTICAL KEY. 



Ovar}' compound, 1-celled, with two or more parietal placentae. 



Calyx caducous ; juice milky or colored. . . Papaveraceje, 57 



Calyx deciduous, of 4 sepals Capparidace.e, 74 



Calyx persistent, of 3 or 5 sepals. , . . . Cistace-e, 76 



Ovary compound, several-celled. 

 Calyx valvate in the bud, and 



Persistent j stamens monadelphous ; anthers l-celled. Malvaceae, 96 

 Deciduous ; anthers 2-celled . . . TiLiACEiE, 101 



Calyx imbricated in the bud, persistent. 



Shrubs; stamens on the base of the petals. Ternstrcemiace^, 95 

 Aquatic or marsh herbs ; ovaries many. 



On 5 placeutse in the axis. . . . Sarraceniace.e, 57 



On the 8-30 partitions Nymph^ace^, 54 



2. Calyx mare or less coherent with the surface of the {compound) ovary. 



Ovary 8 -30-ceiled ; ovules many, on the partitions ; aquatic. Nymph^eace^, 54 



Ovary 10-celled ; cells 1-ovuled. . . . Amelanchier, in Rosacea, 166 



Ovary 2 - 5-ceUed. 

 Leaves alternate, with stipules. . . . Pomeae, in Rosacea, 151 

 Leaves opposite, without stipules. . . Some Saxifhagace.e, 168 

 Leaves alternate, without stipules Styracace^, 333 



Ovary 1-celled, with the ovules parietal. 

 Fleshy plants with no true foliage; petals many. . Cactace^, 186 



Rough-leaved plants ; petals 5 or 10 Loasace.e, 193 



Ovary oue-ceUed, with the ovules rising from the base. Port u lac ace^, 90 



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



Pistils 3-6, separate ; flowers dioecious ; woody vines. Menispermace^, 51 

 Pistil only one. 



Ovary one-celled ; anthers opening by uplifted valves. Berberidace^, 52 

 Ovary one-celled ; anthers not opening bv uplifted valves. 



Style and stigma one ; ovules more than one. . Primulace^, 328 



Style 1 ; stigmas 3 ; sepals 2 ; ovules several. Portulacace^, 90 



Style twice or thrice forked ; flowers monoecious. 



Crotonopsis, in Euphorbiaceje, 458 

 Styles 5 ; ovule and seed only one. . . . Plumbaginace^, 327 

 Ovary 2-4-celled. 



Calyx-lobes minute or obsolete ; petals valvate. . . Yitace^e, 112 

 Calyx 4 - 5-cleft, valvate in the bud ; petals involute. Rhamnace.e, 111 



C. Stamens not more than twice as many as the petals, rchen of just the number 



of the petals then alternate with them. 



\. Calyx free from the ovary, i. e. the ovary wholly superior. 



* Ovaries 2 or more, separate. 



Stamens united with each other and with a large and thick 



stigma common to the two ovaries. . . Asclepiadace^, 338 



Stamens unconnected, on the receptacle, free from the calyx. 



Leaves punctate with pellucid dots Rutace^, 106 



