FLORTTLA ADENENSJS. 13 



from North and South America, described as F. Chilensis and F. Califor- 

 nica, do not differ in any respect from many states of F. cretica, to which 

 I unite them. In F. Calif ornica the spiny stipules are very short, and the 

 sepals somewhat more lanceolate and a little longer than in the mass of 

 specimens of F. cretica ; but there is in the Hookerian Herbarium a spe- 

 cimen from Arabia Petraca which it is quite impossible to distinguish from 

 the Californian specimens. Dr. Hooker has also been unable to find per- 

 manent characters by which to distinguish any of the described species 

 from F. cretica, and he agrees with me in considering all as varieties of one 

 variable species. 



2. Ztgopiiyxlttm, Linn. 



1. Z. simplex {Linn. Mant. p. 68). Caule prostrate, dichotomo, dif- 

 fuso; foliis sessilibus, simplieibus, cylindricis, carnosis, obtusis; floribus 

 parvis, solitariis, pedunculis brevissimis, in fructu deflexis; sepalis 

 obovatis, apice cucullatis ; petalis spathulatis, patentibus ; capsulis ob- 

 longis, subrotundis, 5-angulis, rugosis, loculis 2-5-spermis. — Z. por- 

 tulacoides, Forsk. Descr. p. 88. 



Hab. Aden, ubique in arenosis {Edgew., Hook. fil. et T. ! Madden ! 

 T. Anders.). 



Distr. In Arabia Petrsea ! et Felici ! Scinde ! iEgypto ! Africa occid. ! 

 insulis Capitis Viridis ! 



Subherbaceum, perenne ? viride, carnosum. Caulis rubescens. Flores 

 parvi, numerosi, flavi. 



Subclassis II. Calyciflorae. 



Ordo XI. RHAMNILE. 



1. Zizyphus, Town. 



1. Z. Lotus (Lam. Diet. hi. p. 318). Ramulis spinosis, gracilibus ; foliis 

 ovatis, trinerviis, obsolete crenatis, subtus molliter tomentellis, aculeis 

 binis, breviore recurvo, altero recto, petiolo longiore ; floribus geminis, 

 axillaribus ; pedunculo petiolo multo breviore, deflexo ; stylis duobus ; 

 ovariis bilocularibus ; drupis subglobosis. 



Hab. Aden {Hook. fil. et T. !) 



Distr. In Arabia Petraa ! Afghanistan ! Algeria ! Hispania ! 



Arbuscula. Cortex albidus. Folia 6 lin.-H unc. longa, 4 lin.-l in. 

 lata; petiolus 6 lin. longus. Flores inconspicui. Drupa solitana, 

 magnitudinis cerasi. 



Ordo XII. TEKEBLNTHACE.E. 

 1. Balsamodendron, Kunth. 

 1- B. Opabalsamum {Kunth, Gen. Terebinth, p. 16; var. glabra, Hook, 

 fil. in Herb. Hook.). Glabrum, foliis bi- trijugis, rarissime simplieibus, 



