1845.] Linnean Society. 277 



cases peculiar to the separate islands, although in those instances 

 frequently representatives of others which are found on different 

 islands. 



The number of species enumerated is two hundred and twenty- 

 eight. Of these upwards of a hvmdred are described as new, and 

 six new genera are established, the characters of which are given as 

 follows : — 



Ord. BORAGINEiE. 

 Gen. Galapagoa, Hook.fil. 

 Calyx 4-5-partitus ; laciniis linearibus. Corolla infundibuliformis ; tubo 

 lato ; limbo 5-fido patente ; fauce iiud&. Stamina 5, inchisa, imo co- 

 roUae tubo inserta. Ovarmm 4-loculare. Stylus terminalis, ad basin 

 usque bipartitus ; stigmata 2, obtusa. Semina pendula ; albumine parco, 

 carnoso ; cotyledonibus planis ; radicula majuscula, supera. — 'Herbae 

 Insitlarum Galapagos, hispido-pilosce. Caules prostrati, ramosissimi. 

 Folia alterna, coriacea, versus apices ramulorum detnissime conferta. 

 Floras jjari'j, in axillis foliorum omnino sessiles, valde inconspicui. 

 Obs. Genus Ehretiearum inter Coldeniam et Rkabdiam (secund. clariss. 

 Bentham) medium, ob stylum bipartitum staminaque fundo corollae inserta 

 singulare. 



Ord. SOLANEiE. 



Gen. DicTYocALYx, HooJc.fil. 

 Calyx cylindraceus, 5-fidus ; lobis acutis ; tubo post anthesin subinflato, 

 membranaceo, reticulatim venose. Corolla membranacea, subinfundi- 

 buliformis ; tubo gracili gradatim superne ampliato ; limbo plicato, 

 brevi, vix explanato. Staminum filamenta elongata; anthers inclusje. 

 Ovarium disco carnoso insertum ; stigmate capitato. Capsula evalvis, 

 indehiscens, bisulcata, incomplete 4-locularis, calyce ventricoso inclusa. 

 Semina plurima, majuscula, tuberculata, dissepiment! medio prope 

 angulum parietalem affixa ; testa nitida, obscure grauulata. EnSSryo 

 arcuatus.-— HerbiB Americanae, repentes, glanduloso 1-puhescentes, cum 

 tribu Daturearum, suadente Clariss. Miers, conferendcB. Folia mem- 

 branacea, angulata v. sinuata, subopposita v. bina, Flores axillaret. 



Ord. COMPOSITE. 



Gen. Desmocephalum, Hooh.fil. 



Capitula in axillis foliorum densissimS congesta, monoica, 6-flora; floribus 



3 foemineis ligulatis, caeteris masculis tubulosis. Involucrum compres- 



sum; foliolis 3-5 inoequalibus. ^ece/?<ccM/Mm minimum, epaleaceum. 



Corolla fceminea tubo brevi, lato, piloso; ligula lata, involutd, bifida : 



mascula 4-fida, dentibus extus hispido-barbatis. Antherce ecaudatae. 



. Stylus floris masculi indivisus, acutus ; floris foeminei in ramos 2 elon- 



gatos desinens. Achenium late obcuneatum, compressum, subtrigonum, 



superne pilosum, foliis involucralibus immutalis tectum. — Genus Elvirae 



affine. Radix annua. Caulis pedalis, herbaceus, teres, erectus, a basi 



