466 NATURAL HISTORY OF PLjINTS. 



Germen 1, inserted in bottom and adnate to base of receptacle, free 

 above, 1 -celled; style terminal sulcate, at apex more or less capitate 

 stigmatiferous. Ovules 2, collaterally ascending (of Cratcegm) ; raphe 

 ventral. Fruit drupaceous, crowned by calyx; style more or less 

 persistent apical ; putamen thick bony 1 -seeded. Seed ascending; 

 integuments membranous ; embryo fleshy exalburainous ; cotyledons 

 superior closely convolute. — Shrubs, glabrous or velvet}^ ; leaves 

 alternate or subfasciculate, simple petiolate; stipules small deciduous; 

 flowers racemose or corymbose axillary or terminal; pedicels 

 bracteolate. {Madeira, Mexico?} See p. 402. 



VII. PEUNE^. 



50. Pruirns T. — Flowers hermaphrodite ; receptacle obconical 

 tubular or urceolate lined by a glandular disk. Sepals 5 (more 

 rarely 4, 6), inserted in throat of receptacle, deciduous ; prsefloration 

 imbricated. Petals as many alternating deciduous, more rarely 

 {Ceraseidos) ; prsefloration imbricated. Stamens 10-20, more rarely 

 CO (of the Rosacece). Carpel 1 (more rarely 2 or more), free inserted 

 in bottom of receptacle; ovary 1 -celled ; style terminal, apex dilated 

 stigmatiferous ; ovules 2, collaterally descending ; raphe ventral ; mi 

 cropyle superior extrorse thickly obturated. A drupe ; epicarp 

 membranous smooth {Cerasus, Laicrocerasus), glaucous {Pruiiophora), 

 or velvety {Amygdalus, Fersicd) ; mesocarp pulpy or hard {Amygda- 

 lui) ; putamen smooth, or rugose punctate {Amggdaliis, Persica). Seed 

 1 (more rarely 2) descending ; testa membranous ; albumen thin or ; 

 embryo thick fleshy ; radicle superior. — Trees or shrubs ; leaves alter- 

 nate simple ; petiole often glandular ; blade conduplicate or convolute 

 in vernation ; stipules 2, lateral ; flowers solitary or more frequently 

 corymbose or racemose, often coming out from scaly buds before or 

 with the leaves. {Northern and subtropical America, northern and tem- 

 perate Europe.) See p. 403. 



51. Pygeum G^ertn. — Flowers hermaphrodite or polygamo-dio*- 

 cious ; receptacle concave (of Pr«;?7^«). Sepals 5-15, tooth-like short. 

 Petals as many or 0, small sepaloid. Stamens 10-20. Ovary 

 sessile ; style terminal, apex capitellate stigmatiferous ; ovules 2, de- 

 scending (of Prunus). Fruit dry or drupaceous, often transversely 

 oblong, 1 -seeded. Seed exalbuminous, transversely oblong; embryo 



