OF PLANTS CALLED COMPOSIT^E. 293 



In the 12th edition of Systema Naturae, Linnaeus added 

 to his genus Galea a fourth species, namely Galea sco- 

 paria ; for what reason it would be difficult to discover, as 

 it does not resemble, either in its fructification or habit, [lu 

 any of the three genera of which, as has been shown. Galea 

 was originally composed. This fourth species, which he 

 had at first referred to Ghrysocoma} is now known to be 

 dioecious; — Browne, by whom it was first described and 

 figured, and one of whose specimens I have examined, 

 Linnaeus, and even Swartz when he published his Obser- 

 vationes Botanicae, being acquainted with the male plant 

 only ; which, however, all of them considered hermaphro- 

 dite : nor is there any reason to doubt that Gsertner's 

 genus Sergilus is also the male of this species ; although he 

 has ventured to describe the colour of the embryo, de- 

 ceived, probably, by the size of the imperfect ovarium, and 

 the colour of its inner surface. 



Professor Swartz has since given a more satisfactory 

 account of Galea scoparia, and has referred it to Baccharis /^ 

 to which genus as Richard' and Jussieu* have proposed to 

 limit it, namely to the dioecious species of America, it 

 unquestionably belongs. This limitation of BaccJiaris it 

 may, upon the whole, be expedient to adopt ; by doing so, 

 however, a name of Dioscorides is applied to a genus of 

 plants found only in the new continent; while, notwith- 

 standing the contrarj"^ opinion is expressed by M. de 

 Jussieu,^ sufficient distinctions exist between those species 



4-fidi : Masculi : Antheris exsertis ; Stigmatibus acutis hispidulis : Feminei : 

 Staminibus sterilibus; Stigmatibus acutis 'recurvis. Acheniunk v. parallelo- 

 compressum T. angulatum; angulis (2-3) aristatis: arislis persistentibus, 

 antrorsum dentioulatis. 



Arbor (Insulse S'* Helenee). Folia opposita, indivisa. Panioula terminalis, 

 bracMata. Involucrum oblongum. Palese receptaculi squamis involucri sub- 

 similes. CoroUuIse oohroleuca, tubo arcuato-recuno {ut capitulum prima intuitu 

 radiatum videatur). Mas. Antheris nigricantibus, basi emarginatis, appendice 

 apicis brevissimo, acuta; laculis vestigia septi longitudinalis instruetis. Pern. 

 Staminibus sterilibus distinctis, antheris sagittatis cassis. 



1 ArnoBU. Acad, v, p. 404, et Syst. Nat. ed. 10, vol. ii, p. 1206. 



= Plor. Ind. Occident, iii, p. 1339, 



' Mich. Flor. Bor.-amer. ii, p. 125. 



< Annal. du Mus. d'Hist. Natur. vii, p. 385. 



' I.e. 



