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Sillimans A. Journal

Vol. 46 p. 94. Catalogue of Plants in Illinois & Missouri - In comparing N. American & European plants we find (1) "nearly allied geographical species" (2) Geographical Varieties, "where no specific distinction can be discovered, but where the American & European variety can always be distinguished by some points of minor importance." (3) Identical plants p. 95. Erigeron Canadense & Oenothera biennis are now as widely naturalised in Europe, as Taraxicum Dens-leonis in America.

Engelmann, George. 1844. Catalogues of a collection of plants made in Illinois and Missouri, by Charles A. Geyer; with critical remarks, &c. American Journal of Science and Arts, 46: 94-104.

p. 99. In list 4 hybrids of Robinia are enumerated - Generally both parents grow near hybrid -they are sterile, but grow luxuriantly & are local - Some of the hybrids resemble more one parent than other, & some intermediate

The doubtful hybrids produce more seed than the true

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intermediate hybrids, though far less than the true species - The doubtful hybrids perhaps descended from hybrids impregnated by either parent.

p. 101. Rumex obtusifolia & crispus (both introduced plants) have also produced hybrids

The Association of American Geologists in 1844 Prof. Haldeman has paper "Enumeration of the Recent F. W. Mollusca Important Remarks of Lyell v. Lamarck controverted.

[Haldeman, Samuel Steman. 1844. Enumeration of the recent freshwater Mollusca which are common to North America and Europe; with observations on species and their distribution. Boston Journal of Natural History 4: 468-484. See letters between Darwin and Charles Lyell in Correspondence vol. 7, pp. 306-308.]

New Series

Vol I. p. 450. On the Death & disappearance of some trees & shrubs in Georgia by W. Jones. Four trees mentioned. Mem. Van Diemen's Land.

Jones, W. 1846. On the death and disappearance of some trees and shrubs. American Journal of Science and Arts 2d ser. 1: 450-451.

vol 2. p. 304. Archiv für Naturgeschichte no 1. 1846 on geograph Zoolog. of Indian Archipelago. Dr. S. Müller

Müller, Sal. 1846. On the geographical zoology of the islands of the Indian Archipelago. American Journal of Science and Arts 2d ser. 2: 304.