KEY TO THE FAMILIES 11 



Sepals imbricate. 



Filaments united la 3 or more sets ; leaves pellucid-punctate. 



82. Hypericaceae 156 



Filaments distinct; leaves not punctate. 



Calyx deciduous. SO. Papavehaceae 95 



Calyx persistent. ' 



Stigmas distinct or united, but not discoid; land 

 plants; petals and sepals 4. 



53. CAPP ARID ACE AE 109 



Stigmas united into a disk; aquatic plants; petals 



and sepals numerous. 47. Nymphaeaceae 86 



Sepals valvate; stamens with united filaments. 



81. Malvaceae 154 



tt Stamens few, not over twice aa many as the petals. 

 Stamens as many as the petals and opposite them. 



Anther-sacs opening by hinged valves. 



49. Berberidaceak 94 



Anther-sacs opening by slits. 



Flowers monoecious. 74. Euphorbiaceab 150 



Flowers perfect. 42. Portulacacbae SO 



Stamens aa many as the petals and alternate with them, or 

 more, sometimes twice as many. 



Stamens 6 or less; petals 4: sepals 2 or 4. 



Sepals 2; endosperm present; flowers irregular: stamens 



diadelphous. 51. Fxtmariaceab 95 



Sepals 4, rarely more; endosperm wanting; flowers 

 regular. 

 Capsule 2-ceUed; stamens tetradynamous, rarely 2 



or 4. 52. BRASSICACEAE 96 



Capsule 1-celled; stamens not tetradynamous. 



53. Capparidaceae 109 

 Stamens, petals, and sepals of the same number, or sta- 

 mens more, usually twice as many as the sepals or 

 petals. 



Ovary 1-celled. 



Ovules, or seeds, on basal or central placentae. 



Sepals 2 ; or, if more (in Lewisia) , plant scapose, 

 with fleshy basal leaves and the flowers soli- 

 tary on a jointed scape. 



42. POHTULACACEAE , 80 



Sepals 4-5; plants leafy-stemmed. 



Sepals distinct; petals not clawed; ovary 



sessile. 44. ALSINACEAE 81 



Sepals imited; petals clawed; ovary more or 

 less distinctly stipitate. 



45. Caryophtllaceab 85 

 Ovules, or seeds, on parietal placentae. 



Stamens with united filaments and no stamln- 



odia. 81, Malvaceae 154 



Stamens with distinct filaments. 

 Staminodia present. 



56. Parnassiaceae 110 



Staminodia wanting. 



Stigmas 2-cleft; plants Insectivorous, with 

 glandular-hispid leaves. 



54. Droseraceae 110 

 Stigmas entire; land plants, not Insectiv- 

 orous; leaves not glandular-hispid. 



Styles In ours distinct. 



Sepals persistent, united Into a 

 tube; leaves not pellucid-dotted. 



84. FRANKENLACEAE 156 

 Sepals distinct; leaves pellucid- 

 dotted. 



82. HYPERICACEAE . 156 

 Styles wholly united. 



Corolla regular or nearly so; sta- 

 mens 8 or more. 

 Sepals and petals 4; the latter 

 not fugaceous. 



53. Capparidaceae io9 



Sepals and petals 3 or 5; the 

 latter fugaceous. 



85. Cistaceae 156 

 Corolla irregular ; one petal spurred ; 



stamens 5. 



86. VIOLACEAE 156 



Ovary several-celled. 



Stamens adnate to the gynoecium. 



106. ASCLBPIADACEAE 183 



