KEY TO THE FAMILIES 9 



Plant parasitic; fruit berry-like. 125. Loranthaceae 221 



2. Flowers, at least the staminate, not in aments. 

 a. Ovary superior. 



Gynoecium of 1, or several and distinct carpels ; stigma and style of 

 each solitary. 



Carpel solitary. 



Ovary neither enclosed nor seated in a hypanthium or a calyx- 

 tube. 

 Flowers not solitary in the axils of the leaves ; land plants. 

 Plants with scarlous stipules; flowers cymose. 



43. COHRIGIOLACEAE. 81 



Plants not with scarious stipules; flowers clustered. 



36. Urticaceab 66 

 Flowers solitary in the axils of the leaves; aquatic plants. 



46. Cehatophyllaceae 86 

 Ovary enclosed in or seated in a hypanthium or a calyx-tube. 

 Stamens borne under the gynoecium; calyx corolla— like; 



herbs. 40. Nyctaginiaceab 78 



Stamens borne on the hypanthium or adnate to the calyx- 

 tube; calyx not coroUa-Uke; shrubs. 

 Hypanthium becoming fleshy in fruit, enclosing the 

 tail-less achenes; calyx 4-merous; stamens 4 or 8; 

 leaves silvery-scurfy-. 89. Elaeagnaceae 160 



Hypanthium not becoming fleshy; achenes tailed; 

 calyx 5-merous; leaves not scurfy. (Coleogyne and 

 Cercocarpus in) 60. Rosaceae 116 



Carpels several. 



Stamens Inserted belowTthe ovary. 



(Genera in) 48. Ranunculaoeae 86 



Stamens inserted on the edge of a cup-shaped hypanthium. 



(Genera In) 60. Ros.ACEAE 116 



Gynoecium of 2 or several united carpels ; stigmas or styles 2 or several. 



Ovary, by abortion, 1-celled and 1-ovuled. 



Leaves with sheathing stipules (ocreae). 



37. POLTGONACEAE 66 

 Leaves estipulate, or stipules, if present, not sheathing. 



Trees or shrubs; ovary not seated in a hypanthium. 



34. Ulmaceae 65 

 Herbs or vines. 



Stipules herbaceous; inflorescence spioate or racemose; 

 leaf-blades palmately veiaed. 



35. Cannabinaceae 66 

 Stipules scarious, or hyaline, or none: inflorescence 



cymose: leaf-blades pinnately veined. 

 Fruit a utricle, or achene, circum-scissile or bursting 

 irregularly. 

 Stipules wanting. 



Flowers subtended by an involucre formed 

 by more or less united bracts. 



37. POLYGONACEAE 66 



Flowers not Involucrate. 

 Bracts not scarious. 



38. Chenopodiacbae 74 

 Bracts scarious. 39. Amaranthaceae 78 



Stipules present, scarious. 



43. Cobbigiolaceae 81 



Fruit a capsule, dehiscent by apical or longitudinal 

 valves. 44. Alsinacbae 81 



Ovary several-celled, or with several placentae, several-ovuled. 

 Stamens hypogynous, inserted under the gynoecium in the per- 

 fect flowers, not on a disk in the staminate flowers. 

 Flowers perfect. 



Stamens not tetradynamous. 



Stamens 2; inflorescence spicate. 



(Besseya in) 117. Schophulahiaceae 206 

 Stamens 3-10; Inflorescence cymose or a.xillary. 

 Ovary 1-celled. 



Placentae parietal; pistils 2-carpillary. 



57. Saxifragaceae 110 



Placentae central or basal; pistils of 3-5 car- 

 pels. 

 Calyx not petaloid, of 4 or 5 distinct sep- 

 als. 44. Alsinaceab 81 

 Calyx more or less petaloid, campanulate, 

 merely 5-lobed. 



{Glaux in) 100. PedmuIxAceae 117 



Ovary 3-5-ceUed; leaves verticlUate. 



41. Tethagoniaceae 80 



