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Die natürlichen Pflanzenfamilien: nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen

Nature volume 130, page 456 (24 September 1932) | Download Citation



THE publication of the new edition of “Die natürlichen Pflanzenfamilien”, which has been supervised, since the death of Engler, by Dr. H. Harms of Berlin, is progressing steadily, two volumes, namely, 19a and 19c, having appeared during 1931. Vol. 19a begins with the monotypic order Pandales, based on Panda oleosa Pierre, a West African forest tree of uncertain affinity. This is followed by ten families of Geraniales, from Oxalidaceæ to Bursera-ceæ respectively. More than a third of the. volume is occupied by the account of the Rutaceæ, which, together with those of Zygophyllaceæ, Cneoraceæ, Simarubaceæ, and Burseracese, was prepared by the late Prof. Engler. The great extent of recent research on the Rutaceæ is reflected in the number of genera now recognised in that family, 145 as compared with 111 in the first edition. This is due partly to extensive generic segregation in the subfamily Aurantioidese by Swingle and others. Both text and figures are much blacker than in the first edition, the figures in some cases—for example, Casimiroa edulis (p. 305)—being far too heavily shaded. Most of them, however, are very clear.

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