KET 133 



55. Petals oblong-spatulate. Styles 5. Flowers racem- 

 ed, white. Leaves simple, sharply serrate. Fruit globular, 

 eatable, purplish. Amelanchier. 



Petals roundish. Flowers corymbed. Styles 1-5.. .56 



56. Carpels 1-seeded. Styles 1-5. Flowers white, rare- 

 ly rose-color. Leaves simple, sometimes lobed. Armed with 

 thorns. Crataegus. 



Carpels 2-seeded. Styles 2-5. Flowers white, or 

 rose-color. Leaves simple or pinnate. Unarmed. Pyrus. 



57. Sepals and petals numerous, in several rows, all 

 united at the base in a fleshy cup, beset with leaf -like bract- 

 lets. Pistils few or many, enclosed by the calyx-tube, 

 which becomes in fruit a sort of huge rose-hip. Leaves oval, 

 chiefly acuminate, tomentose beneath. Flowers lurid pur- 

 ple on short branches. Shrub exhaling the fragrance of 

 strawberries. Calycanthus. 



Segments or pieces of the perianth definite 58 



58. Fruit a follicle. Pistils 3-12, Calyx 5-cleft. Pe- 

 tals 5. Flowers (rarely 4-merous) white or rose-color, some- 

 times dicEcioas, corymbed or panicled. Shrubs or herbs. 



Spiraea (8S2). 

 Fruit an achenium. Pistils 2-50^ free, in an open, or 



closed calyx 59 



39. Achenia, dry or pulpy, in an open calyx 60 



Achenia enclosed in the calyx-tube, which becomes 

 fleshy in fruit. Plants shrubby and prickly. Leaves odd- 

 pinnate. Rosa. 



60. Styles deciduous 61 



Styles persistent on the dry achenia 65 



61. Calyx bractless, or minutely bracteoled, deeply 

 parted 62 



Calyx very conspicuously bracteolate (apparently 10- 



lobed) 64 



63. Fruit a congeries of pulpy achenia on a spongy or 

 succulent receptacle. Herbaceous, or somewhat shrubby, 

 with or without prickles. Rubus (880). 



Achenia dry or dryish 63 



