BY A. KELLOGG, M.D. MENTZELIA L. _M. pectinata_ Kellogg. [FIG. 9.] [Illustration: FIG. 9.] Rough, with a white minutely-barbed pubescence throughout; stem four to six inches high; simple, or slightly branched at the summit; greenish, or a little blanched at the base; leaves pinnatifid, lower petiolate, the upper sessile, three-nerved; flowers of a shining golden color, with a lustrous metallic hue, shading from a deep, vivid orange to a burnt carmine center; stamens very numerous, all filiform, scarcely half the length of the petals; anthers white; style longer, spirally twisted above at the divisible portion; petals five, spreading, obcordate or obovate cuneate at the base. Flowers from three-fourths to one inch in diameter, clustered at the summit by the short branches; short pedicellate (the uppermost often sessile or sub-sessile); two or three linear-subulate bracts above the pedicel at the base of the capsule; capsule thickened upwards from a sharp base; calyx segments lance-subulate acute. Root ligneous. Found by Mrs. Hutchings on the mountains above Visalia. REGULAR MEETING, JULY 6TH, 1863. President in the Chair. Twelve members present. Professor George Thurber, of New York City, and F. W. Putnam, Esq., of Cambridge, Mass., were elected Corresponding Members. Donations to the Library were received as follows: Proceedings of the Academy of Natural Sciences of Philadelphia for October-December, 1862. Transactions of the Academy of Science of St. Louis, Vol. II, No. 1. Bulletin of the Museum of Comparative Zoology at Cambridge, Mass. Proceedings of the Boston Society of Natural History, Vol. IX, Signatures 11 and 12. Dr. Kellogg read the following paper: Description of Three New Plants. BY A. KELLOGG, M.D. LINUM L. _L. trisepalum_ Kellogg. [FIG. 10.] [Illustration: FIG. 10.]