26. ROSACEJS. 87 



17. ONOBRYCHIS Gaert. Saintfoin. 



1. 0. sativa (Lam.) ; wings shorter than the calyx, keel about 

 as long as the standard, st. ascending, pods with reticulated 

 spinous elevations on the disk and short sharp flat teeth on the 

 lower suture. E. B. 96. St. 19. 10. St. often 2 feet long. Fl. 

 in long dense terminal racemes, crimson, variegated. Tube of 

 the calyx silky, short ; teeth very long. Leaflets elliptic-oblong, 

 mucroriate, entire, glabrous above, in about 12^ pairs. On chalky 

 and limestone hills. P. VI. VII. E. S. 



Order XXVI. ROSACES. 



Cal. 4 5-parted, or twice as many in 2 rows, lined with a disk 

 below, odd lobe superior. Pet. 5, equal. Stam. usually inde- 

 finite. Carp, several or solitary, distinct or combined with each 

 other or with the calyx. Styles distinct, often lateral. Fruit 

 various. Seeds nearly without albumen, embryo straight. L. 

 alternate, usually compound, with stipules. 



Suborder I. AMYGDALE,E. 



Fruit a drupe. Calyx deciduous, quite free from the solitary 

 ovary. Stipules free. 



1. PRUNUS. Drupe fleshy, indehiscent; its nut smooth or 

 furrowed. 



Suborder II. ROSE.E. 



Carpels several, distinct from each other and from the calyx. 

 Stipules united to the petiole. 



Tribe I. SPIR^E^E. Follicles several ; seeds 16, suspended 

 from the inner edges of the follicles. Calyx persistent. 



2. SPIR^A. Cal. 5-cleft. Stam. many, inserted with the 

 pet. on a disk adhering to the calyx. Follicles 1 or more, 

 usually distinct. Seeds 2 6. 



Tr. II. SANGUISORBEJE. Carpels 13, inclosed in the dry 

 calyx-tube which is narrowed at the top. 



3. SANGUISORBA. Fl. perfect. Cal. 4-cleft, with 2 or 3 ex- 

 ternal scales at its base, tube quadrangular. Pet. 0. Stam. 4, 

 opposite to the segments of the calyx. Nuts. 1 2. Style 

 terminal. Stigma capitate, covered with oblong spreading 

 papillae. Seed suspended. G. F. G. Monochl. 78. 



4. POTERIUM. Fl. monoecious or polygamous. Cal. 4-cleft, 

 with 3 external scales at its base, tube quadrangular. Pet. 0. 



