420 Observations on some new 



Persia, and between it and Hamilton's plant there is so considerable 

 a difference in the form of the leaflets of the corona, that the two 

 can be distinguished with great facility. In C. gigantea the leaflets 

 of the corona are three-toothed at the apex, and then flat and close 

 pressed to the column, while their base is spirally recurved : in C. 

 Hamiltonii these have a condnplicate bifid patulous apex, and an 

 acute simply recurved base : in what I consider the true C. procera, 

 the apex is precisely as in C Hamiltonii, but the base as in C 

 gigantea. The characters of the Indian species are given in Wight's 

 Contributions and the Madras Journal ; the Persian and Arabian 

 one is distinguished as follows : — 



C. procera ; corolla campanulata segmentis patulis margine planis, 

 coronae staminese foliolis gynostegium sequantibus basi obtusa cir- 

 cinnatim recurva apice conduplicato bifido patulo, stigmate piano. 



It thus agrees most with C. Hamiltonii, but differs by the form of 

 the base of the coronal leaflets. 



Blyttia, Am. (Asclepiadeae.) 



Corolla rotata 5-partita. Corona staminea simplex, 5-phylla, foli- 

 olis ovalibus, obtusis, discretis, carnosis, planiusculis. Antherce 

 membrana terminate. Massce pollinis ventricosse, pendulae. Stig- 

 ma muticum. Gynostegium exsertum. FoUiculi lseves, abortu sub- 

 solitarii. Semina comosa. 



Fruticulus sesquipedalis glaber, ramis patulis rigidis. Folia op- 

 posita, petiolala, oblonga vet oblongo-lanceolata, obtusa. Umbellse 

 inter peliolares, pedunculate, folio breviores. Flores parvi. 



1. B. Arabica, Arn. — Periploca? Stend. et Hochst. in Herb. Un. 

 It. 1837- n. 816. 



Hab In collibus granitosis prope Dscheddam : W. Sckimper. 



This genus is obviously closely allied to Cynanchum, particularly 

 those species which have the corona deeply 5-partite ; but here the 

 leaflets are perfectly distinct and somewhat distant from each other. 

 From Xysmalobium it differs by the corolla, and absence of denti- 

 culi between the larger leaflets of the corona. 



Rhinolobium, Am. (Asclepiadeae.) 

 Corolla patens, profunde 5-fida. Corona staminea tubo filamento- 

 rum imposita, 10-phylla ; foliolis 5, antheris oppositis, carnosulis, 

 gynostegium aequantibus, subrotundis, intus sub apice recurvato 

 dente erecto triangulari planiusculo auctis ; 5 reliquis alternantibus 

 minimis. Aniherce membrana terminate. Massa? pollinis teretes, 



