OF ARTS AND SCIENCES. 129 



LIPOCH^TA, DC. excl. sp. Amer. 



Lipotriche, pro parte, Less, in Linnsea, 6, p. 510, & Syn. p. 231, non R. Br. 



LipochcBta, DC. Prodr. 5, p. 610, excl. sp. Amer. (i. e. sp. Zexmenice). 



Microchceta, Nutt. in Trans. Amer. Phil. Soc. 7, p. 450, excl. sp. Wollastonice. 



Schizophyllum, Nutt. 1. c. p. 452, non Fries. 



Aphanopappus, Endl. Gen. Suppl. 2, p. 43. 



Macrosa, Hook. f. in Proceed. Linn. Soc. n. 28, p. 278, & Linn. Trans. (Fl. Galap.). 



Trigonopterum, Anderss. Veg. Galap. in Voy. Eugen. Bot. t. 6, f. 1. 



I cannot doubt that the following Sandwichian species are all con- 

 generic, notwithstanding their diversified habit, and the complete abor- 

 tion in two of them of the short awns or chaffy scales of the pappus. 

 With the latter may also be associated Dr. Hooker's Macrcea, in which 

 the coronula is generally a little more developed, and the awns obsolete, 

 but not always entirely wanting. To merge all these plants in Wollas- 

 tonia (which shows no tendency to winged achenia) would hardly be 

 permitted, although the earlier-enumerated of the following species would 

 not there appear widely out of place. On the whole, it will be more 

 difficult to separate them clearly from Wedelia on the one hand and 

 Zexmenia on the other. 



Since the last-named genus takes in all the American species of De 

 CandoUe's Lipochceta, which genus was essentially founded upon Les- 

 sing's Lipotriche, and this mainly upon the leading Sandwichian species, 

 it is evident that the present group should in strictness bear the name 

 o^ LipochcBta. If the rule of priority be waived on account of the inap- 

 propriateness of this name to one or two of the species, the succession 

 would best fall upon Macrcea. But convenience in the present instance 

 coincides with precedence. 



L. ATJSTRAi.is {Lipotriche australis, Less.) : suffruticosa, hirtello- 

 scabra vel hispidula ; foliis ovatis ovato-lanceolatisve 3 - 5-plinerviis 

 acuminatis argute serratis nunc incisis aut sessilibus aut in petiolum 

 brevem marginatum decurrentibus ; involucri squamis ovato-lanceo- 

 latis subacuminatis. 



Var. a. CONNATA ( Verhesina connata, Gaud. Lipochteta connata, 

 DC.) : foliis sessiUbus basi nunc angustata connatis nunc late connato- 

 amplexicaulibus. 



Var. ^. DECURRENS : foliis basi in petiolum plerumque alatum con- 

 tractis, lamina nunc ovata seu rhombea nunc oblongo-lanceolata, in 

 latifoliis saepius argute duplicato- vel laciniato-serrata. — Here prob- 

 ably belongs Microchceta lanceolata, Nutt. 



VOL. V. 17 



