168 Planta Lindheimeriance. 



which Endlicher happened to examine were pentapetalous, 

 which is not the more usual case ; and he erroneously states 

 the plant to form a large tree, whereas it is commonly a slen- 

 der shrub, of five or ten feet in height, or at most a small 

 tree. Misled by these discrepancies, and by the differences 

 of the two kinds of flowers, and, it would seem from his 

 description, happening to possess tetrasepalous as well as 

 tetrapetalous flowers (although there are five sepals in all 

 my Lindheimerian and other specimens,) Mr. Scheele has 

 wrongly introduced a second species, under the name of U. 

 heterophylla. The leaflets vary from five, or even three, on 

 the earlier leaves, to seven." Gen. III. 1. c. — In seedling 

 plants, raised in the Cambridge Botanic Garden, I have 

 noticed a lusus of the earliest leaves, in which the leaflets 

 are confluent. 



(586.) U. speciosa, Endl. Finer specimens of both sexes ; 

 from New Braunfels. 



(587.) Sapindus marginatus, Willd. ; Torr. fy Gray, Fl. 

 1. p. 255 ; Gray, Gen. 111. 2. t. 180. New Braunfels. June, 

 (in flower.) 



RHAMNACE^E. 



364. Zizyphus obtusifolia, Gray, Gen. 111. 2. p. 170. t. 

 163. Rhamnus obtusifolius, Hook, in Torr. &f Gray, Fl. 1. 

 p. 685. Paliurus Texanus, Scheele in Linncea, 21. p. 580. 

 Bottom woods of Comale Creek, New Braunfels, &c. ; com- 

 mon. A shrub or small tree, with slender shoots and green- 

 ish-white bark ; several times flowering between March and 

 September. No. (588) is the same plant in flower, and in 

 ripe fruit, the fruit ripening the season after flowering. 1 



1 Another species, gathered by Dr. Gregg between Matamoros and Mapimi, may 

 be thus characterized: — 



Zizyphus lycioides (sp.nov.): glabrata ; rami's valde spinosis; foliis oblongo- 

 linearibus parvis integerrimis coriaceis; pedunculis brevissimis3-5-floris; drupa sub- 

 globosa monosperma. — The sharp and straight thorns are from one to two inches in 

 length : the specimen shows no stipular spines. Leaves halfan inch long, one or two 

 lines wide, obtuse. Fruit, of the size of that of the Buckthorn, said by Dr. Gregg to 

 be black and edible. 



