22 ANALYTICAL KEY. 



Pistils several-lobed, the ovaries united below the middle. Resedaceje, 76 



Pistils several, their ovaries cohering in a ring around an axis. Malvace.e, 98 

 Pistils strictly one as to the ovary : the styles or stigmas may be several. 



Leaves punctate under a lens with transparent dots. Hypericace.e, 83 



Leaves not punctate with transparent dots. 



Ovary simple, 1-celled, 2-ovuled Rosacea, 146 



Ovary simple, 1 -celled, with one parietal many-ovuled placenta. 



Leaves 2 - 3-ternately compound or dissected. Ranunculace^e, 34 



Leaves peltate, simply lobed Podophyllum, in Berberidace^, 52 



Ovary compound, 1 -celled, with a central placenta. PoRTULACACEiE, 97 

 Ovary compound, 1 -celled, with 2 or more parietal placentas. 



Calyx caducous. Juice milky or colored. . . Papaverace.e, 58 



Calyx deciduous, of 4 sepals Capparidace.e, 75 



Calyx persistent, of 3 or 5 sepals Cistace^, 80 



Ovary compound, several-celled. 

 Calyx valvate in the bud, and 

 Persistent: stamens monadelphous : anthers 1 -celled. Malvaceae, 98 



Deciduous : anthers 2-celled Tiliace,e, 103 



Calyx imbricated in the bud, persistent. 



Shrubs : stamens borne on the base of the petals. Camelliace.e, 103 

 Aquatic or marsh herbs : ovules many, 



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

 On the 8-24 partitions Nymph^iace^, 54 



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



Ovary 10-30-celled : ovules many, on the partitions : aquatic. Nymph^ace.e, 54 



Ovary 10-celled: cells l-o vuled. . . . Amelanchier, in Rosacea, 146 



Ovary 2-5-celled. 



Leaves alternate, with stipules Pomeae, in Rosacea, 146 



Leaves opposite, without stipules. Philadelphus, in Saxifragace^e, 163 

 Leaves alternate, without stipules Styracace^e, 309 



Ovary one-celled, with the ovules parietal. 

 Fleshy plants with no true foliage : petals many. . . Cactace^;, 184 

 Rough-leaved plants : petals 5 or 10 Loasace^e, 184 



Ovary one-celled, with the ovules rising from the base. Portulacace.e, 97 



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

 Pistils 3 - 6, separate. Flowers dioecious. Woody vines. Meni sperm ace^e, 51 

 Pistil only one. 



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

 Ovary one-celled : anthers not opening by uplifted valves. 



Style and stigma one : ovules more than one. . Primulace.e, 313 



Style one : stigmas 3 : sepals 2 : ovules several. Portulacace.e, 97 



Styles 5 : ovule and seed only one. . . . Plumbagi:nace.e, 312 

 Ovary 2 - 4-celled. 



Calyx-lobes minute or obsolete : petals valvate. . . Vitace^e, 112 

 Calyx 4-5-cleft, valvate in the bud : petals involute. Rhamnace.e, 113 



