4 _ PROCEEDINGS OF THE AMERICAN ACADEMY. 
Society of London, where special attention was given to the types 
of Linnaens filius and of Sir James Edward Smith; (8) the her- 
barium of the Royal Botanical Gardens at Kew, noteworthy to the 
student of the Hupatorieae by exhibiting the very numerous Brazilian 
types of Gardner, Hooker & Arnott, Bentham, and Baker, as well as 
the Mexican work of Hemsley; (9) the herbarium of the British 
Museum of Natural History, including, among many other specimens 
of high interest, the plants of Clayton, Walter, and Philip Miller. 
e writer would here express his sincere thanks to all those in 
charge of these herbaria for their cordial hospitality, uniform courtesy, 
and valuable aid during his researches. He is also indebted to Messrs. 
Oakes Ames and A. A. Eaton for several excellent photographs of 
type-specimens at Paris, to Mr. H. Hua for a critical comparison of a 
Peruvian Piqueria in the herbarium of Jussieu, to Miss Mary A. Day, 
Librarian of the Gray Herbarium, for bibliographical assistance, and 
to Mr. F. V. Coville and Dr. J. N. Rose for the loan of the material of 
Piqueria belonging to the United States National Museum. 
About four hundred photographs of types were taken in the Euro- 
pean herbaria, some important exchanges effected, and many notes and 
sketches prepared, which it is hoped may form an accurate basis for 
considerable work on the group concerned. In the present paper only 
a small part of the results of the summer’s investigation can be pre- 
sented, but as any complete or monographic treatment of so large 4 
group must be delayed for a considerable time, it seems best to record 
such identities and synonymy as can be at once stated with definite- 
ness, in order that certain traditional errors may not become more fixed 
by longer usage. The nomenclature adopted is that recommended by 
the international congress at Vienna. 
I. Reviston or tHE Genus PIQUERIA. 
Piqueria is the typical genus of the Piguerinae, a small subtribe of 
the Eupatorieae. The Piquerinae are chiefly marked by their blunt 
anthers, which entirely lack the more or less expanded, oblong, °F 
‘lanceolate prolongation of the connective, which is present almost 
without exception in other Compositae. In this subtribe the genus 
Piqueria is characterized by a complete absence or very rudimentary 
development of its pappus. Its natural affinities are obviously oD 
one hand with Ophryosporus, which scarcely differs save in the pres- 
ence of a well-developed setose pappus, and on the other hand with 
Alomia and Ageratum, which are habitally approached by the species 
of Pigueria belonging to the subgenus Phalacraea. Geographically 
Piqueria extends from the Sierras of northern Mexico through central 
