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CONTRIBUTIONS FROM THE GRAY HERBARIUM OF HARVARD 
V1. 
UNIVERSITY, NEW SERIES, No. X 
Presented by B, L, Robinson, March 8, 1899. Received March 15, 1899. 
I.—REVISION OF THE GENERA MONTANOA, PERY- 
MENIUM, AND ZALUZANIA. 
By B. L. Rogprnson and J. M. GREENMAN. 
No considerable collection of Mexican or tropical American plants 
has been received at the Gray Herbarium in recent years, which has 
failed to contain one or more new or otherwise exceptionally interesting 
Composite of the subtribe Verbesinee. The repeatedly experienced 
difficulty of properly placing such plants —due on the one hand to the 
imperfect characterization of many of the earlier described species, and 
on the other to the somewhat vague generic lines— has suggested the 
revisions here presented. While by no means exhaustive treatments, 
they correlate the hitherto scattered results of considerable recent work 
on this group, and furnish, in the light of the fuller material now avail- 
able, a new critique upon many of the earlier species. Of the genera 
here treated, Montanoa has long been the most difficult, largely by reason 
of the brief and obscure descriptions of many species, chiefly those of 
Schultz Bipontinus, a writer whose long and intensive study of the Com- 
posite led him to a far more critical discrimination than intelligible 
description of species. Probably no one in recent years has given more 
attention to the work of Schultz than the late Dr. F. W. Klatt, who 
examined many of his types, and, when unable to secure duplicate speci- 
mens, recorded his observations by excellent sketches and notes. The 
recent acquisition of the Klatt collection of Composite by the Gray 
Herbarium has rendered it possible to interpret many of these doubtful 
plants with greater precision than could heretofore be effected on this’ 
side of the Atlantic, Others, however, are still obscure, and must remain 
So until their types can be examined in scattered European herbaria. 
Even when this can be accomplished, it is a question with how much 
practicality or justice such species, many of which are merely nomina 
subnuda, can be revived to displace fully and carefully characterized 
