XLVII. EHAMNACE^. 



I. THE BUCKTHOEN SERIES. 



The flowers of the BucJithorns^ (fig. 39-43) are regular and 

 hermaphrodite or polygamo-dioecious. The concave receptacle has the 



Rhamnus cathartica. 



Fig. 40. Longitudinal section 

 of male flower {\). 



Fig. 39. Fructiferous branch. ' Fig. 41. Diagram. 



form of a deep cup or horn, lined with a thin layer of glandulous 

 tissue, representing the disk, the bottom of which is occupied by 

 the gyneecium, while its margin bears the perianth and androecium. 

 The sepals, four (fig, 42) or five (fig. 40, 41) in number, are 



1 Ehammis T. Inst. 593, t. 366.— L. Gen. 

 n. 265 (part.). — Adans. Fain, des PL ii. 305. — 

 J. Gen. 380. — G.'ertn. Fruct. ii. 110.— Lamk. 

 III. t. 128.— Pom. Diet. iv. 461 ; Suppl. iv. 88. 

 DC. Frodr. ii. 23.--Ad. Br. Mem. sur la Fmn. 



des Rhatm. (1826), 53, t. 2.— Turp. Diet. Sc. 

 Nat. Atl. t. 270.— Spach, Suit, d Bnffon. ii. 447. 

 — Endl. Gen. n. 5722. — Payer, Organog. 490, 

 t. 97.— A. Gray, Gen. III. t. 168.— B. H. Gen. 

 377. 998, n. 10.— H. Bn. Payer Fam. Nat. 327. 



