420 Ohservations on some Jierv 



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

 n 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. 

 Hamillonn these have a conduplicate bifid patulous apex, and an 

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

 the apex is precisely as in C Hamiltonn, 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, 

 coronse stamineae foliolis gynostegium a^quantibus basi obtusa cir- 

 cinnatim recurva apice conduplicato bifido patulo, stigmate piano. 



It thus agrees most with C Hamillonii, but difl'ersby the form of 

 the base of the coronal leaflets. 



Blyttia, Arn. ( Asclepiadeae.) 



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

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

 membrana terminatae. Massoe poUinis ventricosse, pendulas. Slig- 

 ma muticum. Gynostegium exsertum. FoUicidi laves, abortu sub- 

 solitarii. Seniina comosa. 



Fruticulus sesquipedalis glaber, ramis patulis rigidis. Folia op- 

 posita, petiolaia, oblonga vel oblongo-lanceolata , obtnsa. Umbellffi 

 interpeliolares, pedunculatoe, folio breviores. Flores parvi. 



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

 It. 1837. n. 816. 



Hab In collibus granitosis prope Dscheddam : TV. Schimper. ' 



This genus is obviously closely allied to Cynanclium, 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 filamenton 

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

 o-ynostegium aequantibus, subrotundis, intus sub apice recurvato 

 dente erecto triangulari planiusculo auctis ; 5 reliquis alternantibus 

 minimis. Antherte membrana terminatae. Massoe pollinis teretes. 



