110 A. Gray—Memorial of George Bentham. 
the 
Society’s Garden from seeds collected in Western North America 
by Douglas, under the auspices of that society, by which were 
first made known to botanists and florists so many of the 
characteristic genera and species of Oregon and California, now 
familiar in gardens, Gilias and Nemophilas, Limnanthes, 
Phacelias, Brodizas, Calochorti, Eschscholtzias, Collinsias, and 
the like; then the monograph of Hydrophyllee (1884), followed 
the next year by that on Hosackia, and that on the Hriogonee,— 
all American and chiefly North American plants,—the first 
fruits of a great harvest which even now has not wholly been 
gathered in, the field is so vast, though the laborers have not 
been few. Later the Plante Hartwegiane, an octavo volume 
begun in 1839, but finished in 1857 with the Californian collec- 
tions; and in 1844, the Botany of the Voyage of the Sulphur, 
in quarto, the first part of which relates to Californian botany. 
The various papers upon South American Botany are even 
more numerous; one of them being that in which Heliamphora, 
of British Guiana, a new genus of Pitcher Plants, of the Sar- 
racenia family, was established. 
Bentham’s labors upon the great order Leguminose began 
early, with his Commentationes de Leguminosarum Generibus, 
published in the Annals of the Vienna Museun, being the work 
of a winter’s holiday (1836-7) passed in that capital, in the her- 
barium then directed by Endlicher. This was followed by a 
series of papers, mostly monographs of genera, in Hookers 
Journal of Botany, in the Journal of the Linnean Society, and 
elsewhere, by the elaboration of the order for the imperial 
Flora Brasiliensis, and later, by the Revision of the Genus 
Cassia and that of the Sub-order Mimosee, in the Transactions 
of the Linnean Society, the latter (a quarto volume in size) 
published as late as the year 1875. Both are perfect models of 
monographical work. 
An important series of monographs in another and more con- 
densed form was contributed to DeCandolle’s Prodromus, 
namely, the Tribe Fricee in the seventh volume, the Polemont- 
acee in the ninth, the Scrophulariacee in the tenth, the Labiate 
