CONTRIBUTIONS FROM THE GRAY HERBARIUM OF HARVARD 

 UNIVERSITY, NEW SERIES, No. XII. 



By M. L. Fernald, 



Presented by B. L. RoBrxsoN, 9 June, 1897. 



I. — A SYSTEMATIC STUDY OF THE UNITED STATES 

 AND MEXICAN SPECIES OF PECTIS. 



The genus Pedis was founded by Linnseus^ in 1758, to embrace two 

 "'^est Indian species, P. ciliaris and P. linlfolia ; the latter founded 

 ^ite of Sloane " which is well matched by the West Indian plant 

 with o^ IS subulate awns. In November, 1759, Liunajus ^ gave more 



complete descriptions of these species, and an additional reference for 

 P. linifoUa.^ 



la 1762 Jacquin^ described his P. punctata, which was based upon 

 one of Plumier's figures ^ in which the leaves are represented as entire 

 and bearing conspicuous marginal glands ; while the pappus is described 

 by Plumier " in the words " corona foliacea." (This figure has since 

 been referred by De Candolle ® to P. Swartziana, Less.). In 1763, in a 

 much fuller account of the plant, Jacquin ^ describes the pappus as two 

 sette (•' Sem. Hermaphrodita solitaria, linearia, instructa setis duabus ") ; 

 and the leaves, according to the plate and the description, have cilia at their 

 bases. Linnaeus,^" in the same year, recognized Jacquin's P. punctata as 

 distinct from his own P. linifolia, though his distinguishing character 



1 Syst. Nat. ed. 10, 1221. 



2 Hist. Jam. i. t. 149, f. 3 (as Hieracium). 



3 Amcen. Acad. v. 407. 



4 Tagetes ? 2, Browne, Jam. 319. 

 6 Enum. PI. Carib. 28. 



s Plum. PI. Amer. ed. Biirm. t. 86, f. 1 (as Knautia). 

 "! 1. c. 74. 



8 Prodr. V. 99. 



9 Stirp. Amer. 21G, t. 128. 

 1" Spec. ed. 2, 1250. 



