OP ARTS AND SCIENCES. 135 



atos paniculae thyrsoidefe magna? congestis ; receptaculi parvi paleis 

 1-3; corollte tubo gracili limbo abrupte campanulato duplo longiore 

 pappi sorclidi paleas aristiformes barbellatas subsuperante. — Oahu and 

 Hawaii. — In Gaudichaud's original specimens the inflorescence is 

 undeveloped, so that his plate gives no idea of the ample, thyi'soid, com- 

 pound panicle, the divaricate primary branches of which are sometimes 

 six inches long, nor of the great number of the small heads. The 

 leaves, also, are represented as much too broad at the base. 



2. DuBAUTiA L^viGATA (sp. uov.) : foliis oblongo-lanceolatis deor- 

 sum longe attenuatis quasi petiolatis ultra medium argute serratis laxe 

 inconspicue plurinerviis nitidis ramisque glaberrimis ; panicula thyrsi- 

 formi pedunculata nuda ; receptaculo parvo. Flores desunt. — Kauai, 

 Sandwich Islands. Incompletely known ; possibly a variety of the 

 foregoing. 



3. DuBAUTiA LAX A (Hook. & Am.) : foliis glabratis vel strigoso- 

 hispidis oblongo-lanceolatis rariusve ovali- seu cuneato-oblongis antice 

 argute serrulatis acuminatis deorsum longe attenuatis ; capitulis 10-15- 

 floris parvulis in cymam brevem congestis ; corolla paleas pappi (mox 

 rufi) subulato-aristiformes serrato-fimbriolatas vix superante, tubo 

 glanduloso. — Oahu. Badly named, the inflorescence being less lax 

 than that of D. plcmtaginea in fully developed specimens. 



4. DuBAUTiA PALEATA (sp. UOV.) : foliis strigoso-hispidulis lato 

 lanceolatis utrinque vix angustatis sessilibus; capitulis 12-30-floris 

 corymbosis paucis majusculis (5-6 lin. longis) ; receptaculo elevato 

 paleis pluribus onusto ; corollas tubo pappi paleas lanceolatas margine 

 eroso-denticulatas superante, fauce vix ampliata, limbo 5-partito. — 

 Kauai, Sandwich Islands. 



Argyroxiphium and Wilkesia. The characters of the latter 

 genus, and of a new species of Argyroxiphium, with the announcement 

 that this had a circle of paleae at the margin of the receptacle, — and 

 epappose ray-achenia enclosed in the involute subtending scales of the 

 involucre, and therefore belonged to the Madiece, — were published 

 by me, in the Proceedings of the Academy (Vol. II. p. 160), a dozen 

 years ago. These notes appear to have escaped attention. Having 

 now further to add that the paleae of Argyroxiphium are concreted into 

 a cup, in the manner of several Madiece, — so that, indeed, Wilkesia 

 may be viewed as an Argyroxiphium with the ray-flowers and the 

 subtending involucre suppressed, — it is worth while to reproduce the 

 characters with emendations. 



