1 An investigation carried out in the Graduate Laboratories of the Henry Shaw School of
Botany of Washington University and submitted as a thesis in partial fulfillment of the …

The genus Bumelia, with which Dipholis is here united, comprises about forty species, all
American, of which nine occur in Jamaica. They have been the subject of a careful, detailed …

UNIFOLIUM. I have recently, in a single short paragraph,* called attention to this, that neither
the name Smilacina, which still holds place in our American books, nor Tovaria, adopted by …

THE SUBGENERA OF Dubautia THE SHRUBBY or arborescent Compositae of the
Hawaiian Islands have attracted much attention and study. Among them are the related …

The following summary of the American Boraginoideae is the result, first, of a critical
examination and study of the generic lines within the subfamily, and, second, of a careful …

Small, slender trees, shrubs, and perennial to annual herbs; branchlets and twigs slender,
usually distinctly quadrangular (or hexangular) ribbed, sometimes merely subterete …

Leaves.-The leaves of the genus are opposite, membrana-ceous, entire, penninerved,
glabrous or pubescent, and petiolate. The sheaths of the petioles are conspicuous, meeting …

In I905 the writer began a series of contributions under the title, Notes on North American
Willows, of which three were published.'This general title has been dropped because of the …

secondary veinis obscure on both sides or, if visible beneath, at least not raised. The lower
suirface of the leaves is more or less glaucous. Such a veiiatioii is rarely fouLnid in …

INTRODUCTION It has been over fifteen years since I began studies toward this revision.
The long delay certainly has not been due to difficulty in specific delimitations, as is so …