V^; NATURAL HTSTORY OF PLANTS. 



(lornion 1, iiisorted in bottom and adnate to base of receptacle, free 

 ;i}h)v.\ 1 -colled ; stylo terminal sulcate, at apex more or less capitate 

 sti<,nuatiferous. Ovnles 2, collaterally ascending (of Cratcpgus) ; raphe 

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

 |x>rsistont apical ; putamen thick bony 1 -seeded. Seed ascending; 

 integuments membranous ; embryo fleshy exalbuminous ; cotyledons 

 superior closely convolute. — Shrubs, glabrous or velvety; leaves 

 alternate or subfiisciculate, simple petiolate; stipules small deciduous; 

 flowers racemose or corymbose axillary or terminal; pedicels 

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



VII. PEUNEiE. 



50. Prunus T. — Flowers hermaphrodite ; receptacle obconical 

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

 rarely 4, 0), inserted in throat of receptacle, deciduous ; prsefloration 

 imbricated. Petals as many alternating deciduous, more rarely 

 {CerasciJos) ; pra?floration imbricated. Stamens 10-20, more rarely 

 CO (of the Rosacea). 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 {Cera-ms, Laurocerasus), glaucous {Pnmophora), 

 or velvety {AmygilaJus, Persica) ; mesocarp pulpy or hard {Amygda- 

 lui) ; putamen smooth, or rugose punctate {Amygdalus, 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 suhfropical America, northern and tem- 

 per nfp Europe.) See p. 403. 



•>1- Pygeum G^RTN. — Flowers hermaphrodite or polygamo-dioe- 

 cious; receptacle concave (of Pr«w7/*). 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 Primus). Fruit dry or drupaceous, often transversely 

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



I 



