58 PROCEEDINGS OP THE AMERICAN ACADEMY. 



was found only in the punctate leaves of the former. lu the same work * 

 Liun^eus refers to P. ciliaris one of Plumier's figures^ which is hardly 

 recognizable as the West Indian and Florida species, and, as De Candolle^ 

 suggests, is more likely F. Carthusianorum. P. minuta, described at the 

 same time by Linnaeus,* is an obscure thing unless it is the P. minuta 

 of Willdenow's Herbarium, referred by Lessing ^ to P. 'pygmcea^ or 

 the P. minuta^ Schreb.,® which has been referred to Bellium minu- 

 tian, L. The genus Seala was founded by Adanson'' in 1763 partly 

 upon Plumier's figure * which Linnaeus had referred to his own P. 

 ciliaris. 



In 1788 Swartz^ described P. humifusa, a West Indian plant based 

 upon one of Plumier's descriptions and plates ; ^° and three years later, in 

 1791, he described a P. ciliaris^^ which is obviously not P. ciliaris, L., 

 and which has subsequently been named by Lessing -"^ P. Swartziana. 

 In the same work Swartz ^^ describes a P. punctata, not with the pappus 

 a foliaceous crown as in Plumier's plant (De CandoUe refers Plumier's 

 plate to P. Swartziana), or merely of two setas as in Jacquin's se^''" 

 description, but with the pappus of three subulate setse ; and t^* 

 ter, as well as the general description of the plant, seems to . ^ntify it 

 with P. linifolia, L. 



During the remainder of the decade three species were published, only 

 one of which proved a good Pectis. P. pinnata, Lam." (1792) has been 

 identified with Schkuhria ahrotinoides, as has also P. multifida, Orteg.^^ 

 (1797). Cavanille's P. prostrata,^^ published in 1797, from Mexico, is a 

 common species. 



The first extensive consideration of the genus in this century was by 



1 Spec. ed. 2, 1240. 



2 Plum. I. c. t. 151, f. 2. 



3 1. c. 101. 



4 Spec. ed. 2, 1250. 



5 Linnjea, vi. 713 in syn. 



6 Sclireb. in Steud. Nom. ed. 1, 103. 



7 Fam. ii. 131. 



» Plum. PI. Amer. ed. Burm. t. 151, f. 2. 

 9 Prodr. 114. 

 1" Jacobcea humifusa, Hjpericifoliis, Plum. 1. c. 84, t. 95, f. 2. 



11 Swartz, Obs. 307. 



12 Linnaia, vi. 711. 



13 1. 0. 308. 



14 Jour. Hist. Nat. Par. ii. 150, t. 31. 



15 Hort. Matr. Dec. 45. 



16 Cav. Ic. iv. 12, t. 324. 



