)78 



ARBORETUM ET FRUTICETUM BRITANNICUM. 



Other Species of 'Rhamniis. There are various kinds described by authors, 

 several of which are said to have been introduced, but they are either lost or 

 synonymous with kinds already described. Among those which remain to be 

 introduced are some which promise to be useful additions to this genus ; such 



as 



^ R. persicifoHus Bert. (Moris. Stirp. Sard. fig. 2.) An erect shrub, with 

 lanceolate, minutely crenated leaves, pubescent on the under side, and on long 

 petioles. Calyx free. Sardinia. Height 10 ft. to 12 ft. March and April. 



jti R. amygddlinns Desf. Atl. 1. p. 198. A native of the North of Africa, in 

 the fissures of rocks, where it grows to the height of 3 ft., and produces berries 

 used for dyeing yellow, like those of R. saxatilis. 



a^ R. primifolius Smith Prod. Fl. Graec. 1. p. 157. A native of Crete, on 



the highest mountains, and probably only a variety of one of the preceding sorts. 



Se R. Sibtkorpianus Schult. Syst. 6. p. 286. ; R. pubescens Sibtk. Fl. Gnec. 



t. 239. A native of Mount Parnassus, and nearly allied to R. alpinus and R. 



Frangula. 



^ R. PurshrknMS Dec, Prod. 2. p. 25. R. alnifolius of Pursh, but not of 



L'Heritier. (Hook. Flor. 

 Bor. Am.l. p. 123. t.43., 

 and our fig. 267.) A 

 shrub growing to the 

 height of 6 ft., native of 

 North America, on the 

 ^^; banks of the Koorkoosky. 

 R. oleifoHus Hook. 

 Fl. Bor. Am. 1. p.l23. t. 

 44., Tor. & Grav, 1. p. 

 200., and fig. 268. from 

 Hooker, is an evergreen 

 shrub, with coriaceous 

 leaves, unarmed shoots, 

 .j^j, ,,, ,, and the flowers small, in 

 ^^^WM axillary crowded panicles. 

 It is a native of the north- 

 west coast of California, 

 where it forms a handsome shrub from 6 ft. to 12 ft. high. 



a^ R. uvibelldtus Cav. Icon. 6. p. 2. t. 504. A shrub, growing 6 ft. high in 

 Mexico ; was raised in 1839 in the Hort. Soc. Garden, from seeds sent home 

 by M. Hartweg ; but it is probably only half-hardy. 



R. /aurifolius Nutt., R. croceus Nidi., jR.^lanceolatus Pursh, R. parvifolius 

 Tor. Sf Gray, R. ferrugineus Nutt., R. californicus Esch., and R. texensis 

 Tor. Sf Gray, are described in Tor. and Gray's Flora of North America ; R. 

 pubescens Fl. Grcec, and several others, are described in Don's Miller, and 

 in the first edition of this work. 



Genus V. 



267. Khamnus PurshiAnu*. 



268. ilhamnus oleifolius. 



COLLET/yi Com. The Colletia. Lin. Syst. Pentandria Monogy^nia. 



Identificatton. Kunth Nov. Gen. Amer., 7. p. 38. ; Dec. Prod., 2. p. 28. Don's Mill., 2. p. 34. 

 Synonyme. /?haninus in part. 



Derivation. Named l)y Commerson, in honour of Collet, his friend and countryman, who wrote 

 upon the plants of Brest. 



Gen. Char. Calyx campanulate, membraneous, coloiu^ed. Petals wanting, or very 

 minute, linear. Stamens with ovate 2-celled, or reniform 1-celied, anthers. 

 Disk short, cup- shaped, adnate to the bottom of the calyx. Ovary free, 

 3-ceiled. Style simple, elongated. Stigma 3-lobed. Fruit guarded at the 



