Pruniis.'] 



XXVII. AMYGDALEiE. 



117 



** 



Style terminal. 



11. Sangutsorba. Petals o. Calj-x single (4-cleft,) with 2—3 external 



bracteoles at its base. Stamens 4. Stigma capitate. 



12. PoTERiUM. Petals o. Calyx single (4-cleft). Flowers usually 



monoecious. Stamens many. Stigma tufted. 



13. Agrimonia. Petals 5. Cah^x single (5-cleft), without external 



bracteoles. 



Tribe 4. Rosid^. Petals 5. Achenes numerous, enclosed within the jieshj 



calyx-tubej which is contracted at the orijice, 



14. Rosa. 



Sub-Ord. III. PoME^. Petals several Carpels united and adhering hy 

 their hack to the calyx-tube, thus resembling an inferior fruit. Stipules free, 



15. MEsriLus. Calyx-segments large, foliaceous. Petals large, roundish. 



16. Crat^gus. Calyx-segments small. Petals large, roundish. Cells 



of fruit honj, 



17. Cotoneaster. Calyx-segments small. Petals small, erect 



18. Pyrus, Calyx-segments small. Petals large, roundish. Cells of 



fruit cartilaginous. 



Sub-Ord, I. AMYGDALE^. Cal, ivferior^ deciduous. Ovary 



solitary^ superior. Style ], terminal. Fruit a solitary drupe,, 



with one or two seeds suspended from the top of their cell. 



Trees or shruhs with simple leaves and stipvles free from the 



petiole. All the parts abound in Prussic acid. (Gen. 1.) 



1. Prunus Linn, Plum and Cherry. 



Cal, 5-cleft. Pet, 5. Nut of the drupe smooth, or furrowed 

 at the margin. 



phrastus. 



I^amed Trpowrj in Greek, according to Theo- 



* Fruit covered loith bloom. Young leaves convolute, Prunus D C. 



1. P. communis Huds, {common P.) ; peduncles solitary or m 

 pairs, leaves elliptic or ovate-lanceolate somewhat downy be- 



C7 ' 



P. spinosa i. .- 



neath especially when young. — a, sjnnosa; peduncles glabrous, 

 leaves at length glabrous, branches spinous. 

 E. B. t. 842, — (3. insititia; peduncles and under-side of the 

 leaves pubescent, branches slightly spinous. P. insititia L. : 

 -E. B. t. 841. — y. domestica; peduncles glabrous, leaves at 

 length glabrous beneath except sometimes the midrib, branches 

 unarmed. P. domestica L. : E. B. t. 1783. 



Hedges, coppices, and woods, 

 ham, Sussex ; and Isle of Wi^rht. 



7. perhaps truly wild at Twine- 

 Hudson and Smith 



were of opinion that var. j8. and y. are forms of the same plant, and 

 We are satisfied that the first of these cannot be satisfactorily distin- 

 guished from P. spinosa. Dr. Bromfield also observed that in Hamp- 

 shire P. spinosa is linked to the other two " by such imperceptible 

 and evanescent degrees of aflBnity, as to defy any specific formula 

 that can be framed to distinguish them." P. spinosa has in general 



