CONTRIBUTIONS FROM THE GRAY HERBARIUM OF HARVARD 
UNIVERSITY, NEW SERIES, No. XIL 
By M. L. Ferna.p. 
Presented by B. L. Rosrxson, 9 June, 1897. 
I.—A SYSTEMATIC STUDY OF THE UNITED STATES 
AND MEXICAN SPECIES OF PECTIS. 
Tue genus Pectis was founded by Linnzus! in 1758, to embrace two 
West Indian species, P. ciliaris and P. linifolia; the latter founded 
upon a plate of Sloane ? which is well matched by the West Indian plant 
with corneous subulate awns. In November, 1759, Linnzus* gave more 
complete descriptions of these species, and an additional reference for 
D. linifolias 
In 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 
Set (“ Sem. Hermaphrodita solitaria, linearia, instructa setis duabus ”) ; 
and the leaves, according to the plate and the description, have cilia at their 
males. _ Linnzus,” in the same year, recognized Jacquin’s P. punctata as 
distinct from his own P. linifolia, though his distinguishing character 
Tarren rey ot A Da Se 
1 Syst. Nat. ed. 10, 1221. 
? Hist. Jam. i. t. 149, f. 8 (as Hieracium). 
3 Ameen. Acad. v. 407. 
* Tagetes ? 2, Browne, Jam. 319. 
5 Enum. Pl. Carib, 28. 
® Plum. Pl. Amer. ed. Burm. t. 86, f. 1 (as Knautia). 
7 Le. 74. 
8 Prodr. v. 99. 
® Stirp. Amer. 216, t. 128. 
Spec. ed. 2, 1250. 
