74 DICOTYLEDONOUS PLANTS. 



R. alnifolius of Pursh is described by De Candolle as a distinct 

 species, under the name of R. purshianus. 



2. R. catharticus Linn. : branches spiny ; leaves opposite, ovate, 

 erosely denticulate ; flowers mostly 4-cleft, polygamo-dioecious ; ber- 

 ries 4-seeded, subglobose. 



HAB. Woods on mountains. N. S. Small tree or large shrub, 

 with yellowish-green flowers. Introduced. 1 Buck-tfu>rn. 



2. CEANOTHUS. Linn. 



Calyx 5-cleft, campanulate, persistent and somewhat ad- 

 hering with the fruit. Petals 5, small, saccate and arched, 

 with long claws. Stamens exsert. Styles 2 3, united to 

 the middle. Berry dry, (a capsule ?) 3-celled, 3-seeded, 3- 

 parted, opening on the inner side. Pentandria. Monogynia. 



1. C. americanus Linn. : stem shrubby ; branches terete and some- 

 what pubescent ; leaves ovate-oblong, alternate, serrate, 3-nerved, to- 

 mentose, pubescent beneath, sometimes subcordate ; panicles axillary, 

 on long peduncles. 



HAB. Woods. Can. to Flor. W. to Miss. July. !>. Stem 

 2 3 feet high. Leaves on petioles. Flowers small, white, in a 

 racemed panicle. Root very large, dark red. 



New- Jersey Tea. Red-root. 



2. C. herbaceus Raf. : leaves oval, slightly serrulate, smooth ; pani- 

 cles thyrsoid, axillary and terminal. P.perennis Pursh. 



HAB. Rocky places. Penn. to Car. Suffruticose. Leaves near- 

 ly as large as in the former, but smooth. 



3. C. ovaUs Big. : leaves oval, glandular-serrate, 3-nerved, the veins 

 pubescent underneath ; panicle corymbose, abbreviated. 



HAB. Shores of Lake Champlain. Dr. Boott. Leaves 1 3 in- 

 ches long, petioled, elliptical, obtuse or subacute. Peduncles 

 shorter than in C. atnericana and tkejlowers larger. Fruit black- 

 ish. 



ORDER XXXIV. ANACARDIACEjE. Lind. 



Flowers usually diclinious. Calyx usually small, persis- 

 tent, 5-(sometimes 3 4 7) divided. Petals equal in num- 

 ber to the segments of the calyx, (sometimes wanting) perigi- 

 nous, imbricated in aestivation. Stamens equal in number to 

 the petals, and alternate, or twice as many or more ; fila- 

 ments distinct or cohering at the base. Disk fleshy, annular 

 or cup-shaped, hypogynous, occasionally wanting. Ovary 

 single (or rarely 5 6) free or rarely adhering to the calyx, 

 1 -celled ; styles 1 3, sometimes 4 ; stignias as many. Fruit 



