FLORA OF SOUTH AMERICA. 351 



Contributions towards a Flora of South America. 

 Enumeration of Plants collected by Sir Robert Schom- 

 burgk, in British Guiana. — By George Bentham, Esq. 



{Continued from Vol. IV. p. 674.) 



CONVOLVULACEJS. 



S81. Maripa densiflora, sp. n., caule scandente glabro, 

 foliis ovato-v. oblongo-ellipticis acuminatis glabris, panicula? 

 terminalis glabrae pedunculis brevibus confertim multifloris, 

 bracteis minutis, sepalis exterioribus glabris interioribus extus 

 basi sericeis, corolla sericeo-villosa. — On the Rio Padawire, 

 Schomburgk. 



Caulis lignosus, alte scandens, ramulis seepe volubilibus. 

 ■tolia coriacea, nitida, 4-6-pollicaria, iis M. scandentis iconis 

 Aubletii simillima. Panicula subpedalis, pyramidata, basi 

 ioliata, subflexuosa, glabra. Pedunculi seu rami inferiores 

 bipollicares, folio subtensi, superiores multo breviores aphylli. 

 Cymae confertae, 10-15-florse. Bracteae et bracteolee squamae- 

 formes, brevissimae v. obsoletae. Pedicelli calyce multo 

 breviores. Calyces subglobosi, 3 lin. longi • sepala orbiculata, 

 concava, in. sicco ferruginea, margine membranacea, lsevia et 

 brevissime ciliata, dorso exteriora punctato-corrugata, interiora 

 pdis longiusculis appressis sericea. Corollae nondum apertse 

 m alabastro extus villosissimee, tubo tamen ut in M. scan- 

 ttente glabro, intus glabra?. Antherae M. scandentis et fila- 

 menta pariter basi dilatata et ibidem glanduloso-pilosula, 



e to very near the summit, the ciiia equalling or overtopping the 

 °nger calyx-valve (but shorter than it in M. ciliata). 



may remark that the cilia are affixed to the paleae in M. ciliata pre- 



se y as in my Pierrefitte plant, which I have ascertained by an examination 



th of authentic specimens in Mr. Webb's herbarium at Paris, and of 



^ own, although Koch describes them as arising from the very margin 



e f; but the portion intervening between the line of hairs and the true 



raargm ls inflexed and so diaphanous, that unless the palea be flattened 



and the hairs turned aside under the microscope, it is almost certain 



10 escape observation. 



