324 PROCEEDINGS OF THE AMERICAN ACADEMY 



curvatus : stigma laterale. Fructus baccatus ? — Frutex sarmentosus ; 

 foliis oblongis subintegerrimis ramisque glabris ; stipulis minimis ca- 

 ducis; racemis paniculisve axillaribus multifloris ; pedicellis2-3-brac- 

 teolatis infra apicem articulatis ; floribus parvis viridulis. 

 " Agatea violakis, sp. nov. — Feejee Islands. 



" The other genus is from the Sandwich Islands, where three species 

 were collected by the naturalists of the Expedition. It belongs to the 

 section AlsodinecB, having a regular corolla. Indeed, it differs from 

 Alsodeia, Paypayrola, AubL, and Pentaloba, Lour, (if these are distinct 

 genera), chiefly in the entirely separated stamens, with narrow filaments 

 and normal anthers, destitute of any dilated or prolonged connective, 

 and in the unilateral stigma, which, in a flower otherwise perfectly 

 regular, vindicates its relationship with the genuine Violeae. The fol- 

 lowing are the characters of the genus and species. 



" ISODENDRION, Nov. Gen. 



" Calyx 5-phyllus, aequalis, persistens. Corolla regularis ; petala 5, 

 lineari-spathulata, longe tubuloso-conniventia, apice dilatata patentia. 

 Stamina 5, discreta : filamenta angusta, inappendiculata, apice baud 

 producta, antheram basifixam nudam gerentia. Ovarium uniloculare ; 

 placentis 3 parietalibus 2-ovulatis, Stylus elongatus, subclavatus, apice 

 decurvus : stigma punctiforme laterale. Ovula collateralia, horizontalia. 

 Capsula coriacea, 3-sperma, 3-valvis. Semina Violse. — Arbusculae 

 vel frutices Sandwicenses ; foliis alternis confertis ; stipulis triangulatis 

 appressis diu persistentibus ; floribus axillaribus solitariis breviter pedi- 

 cellatis parvis. 



" IsoDENDRioN PYRiFOLiUM : foliis membranaccis ovalibus seu ovato- 

 ellipticis crenato-serratis petiolatis, junioribus subtus ramulisque pubes- 

 centibus ; stipulis sepalisque dorso sericeis margine scariosis ; floribus 

 pendulis. — Kaala Mountains, Oahu, Sandwich Islands. 



" IsoDENDRioN LONGiFOLiuM : glabrum ; foliis subcoriaceis obovato- 

 lanceolatis seu cuneato-oblongis in petiolum angustatis subrepandis ; 

 sepalis ovatis stipulisque Isevibus ; floribus in ramos crassos brevissime 

 pedicellatis. — Kaala Mountains, Oahu, Sandwich Islands. 



" IsoDENDRioN LAURiFOLiuM : glabrum ; foliis coriaceis oblongo- 

 lanceolatis subrepandis basi obtusis brevissime petiolatis ; sepalis lan- 

 ceolatis. — With the preceding. 



" The other Violacese of the Sandwich Islands which occur in the 

 collection are the shrubby Viola Chamissoniana of Gingins, from which 



