CISSUS HAHNlANtJS. 179 



46. Toiirneforfia volubilis, L. Rare. 



47. Heliotropium hispidum, Kth. 



48. //. inundatum, Sw. Both very common in the depressions of 

 the soil which are due to the old salt-ponds. 



49. H. curassavieum, Ij. (Cocolode in Cnrazao). On rocks near the 

 coast. 



50. Lippia micromera, Sch. {Oregano). Common. 



51. Avicennia nitida, Jacq. 



52. A. tomentosa, Jacq. Both pretty common. 



53. Ruppia maritima, L. This plant was only once found, on a 

 very shallow sand in the little bay called Carenero, on the eastern 

 part of the south coast. The specimens were in fruit, with three carpels, 

 podooarps twice as long as the fruits, their basal part somewhat spirally 

 twisted. 



54. Thalassia testudinum, Keen. Exceedingly common off the north 

 coast, where it forms large submarine meadows, during the night the 

 feeding-ground of great numbers of turtles. The specimens had 

 neither flowers nor fruit. (One of my pupils, Mr. G. Lessmann, a young 

 pharmaceutist, sent me a great many ripe fruits of this plant, which 

 he had collected in September, last year, off Cabo Blanco, to the west 

 of La Guayra.) 



55. Sporobolus virginicus, Kunth. Common. 



56. Cenchrus ecliinatus, L. 



57. Cenchrus triluloides, L. 



58. Paniciim adscende^is, H.B K. (?) 



59. Setaria didicha, Kth. 



60. Arisiida stricta, Michx. (?) 



61. Vilfa Jmmifusa, Kth. All very common. 



62. Cyperus brumieus, L. Very common on the beach. 



63. OpegrapJm, spec. On dry branches. 



64. Pertusaria dealhatus, Ach. On limestone. 



65. Usnea florida. DC. On branches. 



66. Roceella tinctoria, Agh. Sparingly on rocks. 



67. R. fuciformis, Ach. On the branches of different woody plants 

 in the neighbourhood of the sea, 



68. Ramalina calicaris, Ach. 



69. R. scopulorum, 3. tortuosa, Ach. Both on branches of Maaria 

 heterophylla. 



It will be seen from this enumeration that the Flora of Tortuga has 

 been totally derived from the neighbouring coast, seeds having been 

 transported by currents or by birds. 

 Caracas, January 15, 1876. 



CISSUS HAHNIANUS. sp. nova, FROM VENEZUELA. 

 Br Dr. A. Ernst. 



ScANDENS, caulihus ramisque teretibus glabris griseis nodis incrassatis ; 

 foliis petiolatis simplicibus cordato-orbiculatis quintuplinerviis pianati- 

 partitis (superioribus minoribus tripartitis vel sub integria), segoientis 

 quinque infimis oblique bilobatis Bummo tripartite, omnibus margine 



X 2 



