XXXVI BYHOP8I8 OF THE NATURAL ORDERS. 



53 Sepals petal-like, deciduous. Anthers extrorse. 



i. RanunculacecB (Caltha). 

 Sepals petal-like, persistent. Anthers introrse. 



i. Ranunculacea (Pasonia). 



54 Fruit separating into several carpels. No perianth. ... 55 

 Fruit not separating into carpels 56 



55 Carpels 4, not bursting. Stamen 1. 



Ixxiv. Callitrichacece. 

 Carpels 3 or 2, opening, separating with elasticity. 



Ixxii. Euplwrbiacece. 



56 Leaves with stipules 57 



Leaves without stipules 58 



57 Stipules sheathing the stem Ixvi. Polygonacea. 



Stipules attached to the petiole. 



xxvi. Rosacece (Sanguisorbeae). 

 Stipules free, deciduous. Ovary 1-celled. Perianth 



4 5-parted Ixxv. Urticacece. 



Stipules free, deciduous. Ovary 2-celled. 



Ixxvii. Ulmacece. 



Stipules free, deciduous. Ovary 1-celled. Female 

 perianth scale-like, open . . . .Ixxvi. Cannabinacece. 



58 Flowers mono3cious or dioecious 59 



Flowers perfect or polygamous 60 



59 Fruit fleshy. Male fl. each of one 2-celled naked sta- 



nien crowded together on a spadix. 



xciii. Aracca (Areas). 



Fruit fleshy. Stamens 2 or 3. Perianth of scales im- 

 bricated in several rows Ixxi. JEmpetracece. 



Fruit dry. Stamens 3 or more. Perianth tubular. 



Ixvii. Elceagnacece. 



Fruit dry. Stamens 1220. Perianth 10 12-cleft. 



Ixxiii. Ceratophyllacece. 



60 Perianth hardened over the fruit. 



xiv. Caryophyllacefv (Scleranthese). 



Perianth not hardened over the fruit 61 



Perianth none. Fruit compressed linear and leaflike at 

 the end xlix. OUacecp. (Fraxinus). 



61 Perianth 3 5-cleft, herbaceous . .Ixv. Chenopodmcecs. 

 Perianth 3-cleft, scarious. .'... .Ixiv. Amaranthacece. 

 Perianth tubular. Stamens perigynous. 



Ixviii. Thymelacea. 



Perianth 6 8-parted, herbaceous. Stamens hypo- 

 gynous Ixxx. Trilliacece. 



62 Leaves net-veined. Floral envelopes whorled 63 



Leaves net-veined. Perianth none. Fl. monoecious, 



on a spadix xciii. Aracece (Arese). 



