[108] Heinrich Ludwig Muhlenberg, 1756-1817; a Lutheran preacher in Lancaster, Penn.; published a Catalogue of North American Plants, and a Description of North American Grasses.

[109] James Watson Robbins, M. D., 1807-1879; physician at Uxbridge, Mass. “A most critical student of the botany of New England and northern United States, and especially of the Potamogetons” [A. G.].

[110] Edward Palmer; has collected largely in southern Florida and Mexico.

[111] “Dr. Gray, with Mr. Cowles and some of the neighbors, had gone up Negro Mountain. He found on the top the plant he expected, a Saxifraga, made out the narrow ravine he had explored thirty-six years ago, found it, and in its same spot the rare plant (an Aconite) he had then discovered, rarely seen growing since, and so came back triumphant.”—Extract from Mrs. Gray’s journal.

[112] Howard Shriver, M. D., formerly at Wyethville, Va., now at Cumberland, Md.

[113] John A. C. Roeper, 1800-1884; director and professor in the Botanic Garden at Bâle; removed to Rostock, Prussia, as professor, before 1840.

[114] The Yale Lectures.

[115] Alphonse Lavallée, 1835-1884. Paris. “His specialty, ornamental trees and shrubs, of which he had nearly the largest and best collection in Europe, studying them with assiduity” [A. G.].

[116] Dr. C. H. Schultz [Bipontinus], 1805-1867. Rhenish Bavaria. A distinguished botanist, who devoted himself to Compositæ, and amassed an extremely rich herbarium in that family.

[117] Willdenow’s Asters were sent over to me here!—A. G.