SYNOPSIS OF THE GENERA. 



Class 12. Icosandrta. — (20 or more Stamens 

 placed upon the calyx.) 



Order I. Monogtnia. — I Pistil. 



1. Prd'nus, [Page 682.J Calyx five-cleft, inferior. Petals 



five. Fruit a persistent fleshy drupe, covered with a blue 

 powder or bloom, nut smooth, having a slightly elevated 

 seam. — Leaves convulute, flowers solitary, on a pedicle 

 subumbellated or fasciculated. 



2. Cera'sus, [Page 684.] Calyx five-cleft, inferior. Petals 



five. Fruit a persistent smooth fleshy drupe, globose, or 

 umbelicated at the base, and without any bloom on the 

 surface, nut smooth, sub-globose. — Leaves conduplicate. 



Order II. Pentagynia. — 6 Pistils {but variable.) 

 * Flowers complete, superior. 



3. Mespi'lus, [Page 687.] Ca/?/x five- cleft, foliaceous. Petals 



five. Disk large. Styles two to five, smooth. Fruit 

 turbinate, the area at the apex much dilated, and exposing 

 the hardened ends of the cells. — Trees ivith serrated undi- 

 vided leaves and solitary flowers. 



4. CRATiE'GDS, [Page 688.] Calyx five-cleft, with acute seg- 



ments. Petals five. Styles one to five. Fruit oval or 

 round, the apex closed over the ends of the cells.— Tre^s 

 or shrubs, with lobed leaves and cymose flowers. 



5. Cotoneas'ter, [Page 690.] Calyx with five short teeth. 



Petals five, small, erect. Stamens erect. Fruit turbi- 

 nate, with the nuts adhering to the inside of the fleshy 

 calyx, but the ends free.] 

 f Bushes ivith entire leaves, tvoolly beneath, and cymose flowers. 



6. Py'RUS, [Page 691.] Calyx with five segments. Petals 



five, roundish. Styles two to five. Fruit {pomum apple) 

 fleshy, with from two to five two seeded cartilaginous cells. 

 — Trees ivith serrated undivided or pinnated leaves and 

 cymose flowers. 



** Flowers complete, inferior. 



7. Spir^'a, [Page ^^697.] Calyx five-cleft, persistent. Petals 



five. Fruit of from one to twelve capsules, two valved, 

 and from two to four seeded. 



