REPORT ON TIIF. BOTANY OF JUAN FERNANDEZ AND MASAEUERA. 43 



with trunks in proportion, hard wood, the brandies almost always in threes, and the 

 flower-heads in panicles. In one species the flower-heads resemble in size, shape, and 

 colour, those of HypockcBris helvetica. By incision they all exude a thick viscous milky 

 juice in enormous quantity. The stems and branches are hollow ; the inflorescence pani- 

 culate ; the leaves, simple and alternate usually, are pinnate in one species. In this the 

 leaflets vary infinitely ; sometimes they are linear and simple or bifurcate, sometimes 

 toothed with the terminal lobe cordiform or reniform, like the leaves of Caliha palustris 

 or Asarum europcBum, but much larger. I think this is the finest discovery I have made." 

 From the foregoing there is no doubt what plants he had in view ; but, unfortunately, he 

 proposed no name for the genus, though his manuscript name, Rea, probably existed even 

 at that date. In 1833, Decaisne published (Guillemiu, Archives de Bot., i. p. 513) Ber- 

 tero's six species of Rea, and described a seventh himself — the Rea berteriana, which 

 Bertero regarded as possibly a variety of his pinnata. A little more than a year- 

 earlier, however, Don (Philosophical Magazine, April 1832) founded Dendroseris, on a 

 single species, it is true, yet that entitles him to priority, and we somewhat regretfully 

 follow Hooker and Arnott, who in 1835 reduced Bertero and Decaisne's species of Rea 

 to the older published genus Dendroseris. In spite of these facts, De Candolle revived 

 the name Rea three years later in the Prodromus, on the strength of having seen it in 

 manuscript in Bertero's Herbarium in 1830 ; and Gay follows him in the Flora Chilena. 



Of the present species, Dendroseris berteriana, we have only seen Bertero's specimen, 

 collected more than fifty years ago, so it must be very rare, or perhaps even extinct, for 

 so conspicuous and distinct a plant could otherwise hardly have been overlooked by all 

 subsequent collectors. 



Dendroseris macrophylla, Don. 



Dendroseris macrophyUa, Don. in Phil. Mag., 1832, p. 388 ; Hook, et Arn. in Hook. Comp. Bot. Mag., 



i. p. 32 ; Bot. Mag., t. 6353. 

 Rea macrantha, Bert, ex Decaisne in Guill. Archives de Bot., i. p. 514, t. 9, fig. A., et 10, fig. 1 ; 



DC, Prodr., vii. p. 243 ; Gay, Fl. CM., iii. p. 463. 



Juan Fernandez. — Shady woods on the higher mountains — Bertero ; Reed ; Moseley. 

 Masafuera. — Cuming, 1350; Downton. 



Don founded the genus on a specimen of this species, collected by Cuming, about a 

 year before the publication of Bertero's name Rea, 



Dendroseris marginata, Hook, et Arn. 



Dendroseris marginata, Hook, et Arn. in Hook. Comp. Bot. Mag., i. p. 32. 



Rea marginata, Bert, ex Decaisne in Guill. Archives de Bot., i. p. 519 ; DC, Prodr., vii. p. 243 ; Gay, 

 Fl. Chil., iii. p. 467. 

 Juan Fernandez. — Endemic. Piocky woods of the higher mountains, at a place called 

 Portezuelo — Bertero. 



