PHANEROGAMIA. 371
A description of the internal structure, (1st.) of the steins of the above species, which offer no peculiarity—and (2nd.) of the root and root-fibres, which become thickened and tuberiform. After passing into the root, the circle of woody tissue which, in the stem, is interposed between the pith and bark, resolves itself into two to six distinct rings or bundles which traverse the greatly developed, starch-abounding parenchyma of the tuber, and ulti- mately, in approaching the extremity of the root converge, re- uniting to form a single central mass. The author compares this structure in Sedum, — the independent woody bundles of the tubers — to certain abnormal liane formations figured by Graudi- chaud from a certain South American Sapindacea.
Hoffman, Eh. — Jahresbericht uber die Eortschritte der Agricul- turchemie mit besonderer Berucksichtigung der Pflanzenchemie und Pflanzenphysiologie. Vol. II. 1859-60. 8vo. Berlin, 1861.
Hooker, J. D. — Illustrations of the Moras of the Malayan Archipe- lago, and of Tropical Africa. Linn. Trans, xxiii. pp. 155-172 With 9 plates.
The new genera described are Disepalwn, Sphcerothalamus (Anonaceae) ; Pacliynocarpus (Dipterocarpese) ; Irvingia (Sima- rubeae) ; Pentaspadon, HaematostapJiis, Parishia (AnacardieEe) ; Trigonochlamys, Triomma (Burserese) ; Hemiandrina (Conna- raceae). Mgures are given of most of these.
— An account of the Plants collected by Dr. Walker in Green- land and Arctic America, during the expedition of Sir Francis M'Clintock, B.K, in the yacht " Pox." Linn. Proc. v. pp. 79-89. The principal interest of Dr. Walker's collection attaches to an herbarium of 46 flowering and 58 cryptogamic plants gathered at Port Kennedy, in the Peninsula of Boothia, the flora of which was previously unknown. The Port Kennedy Morula appears to be poorer than that of the surrounding islands, although favoured by the absence of snow for about four months each year, and ample variety of surface. Tables are given by Dr. Hooker of 20 species occurring in Melville Island, which are wanting at Port Kennedy ; of 6 species found at the latter absent from Melville Island ; of 5 species of Port Kennedy plants absent from the Western shores of Baffin's Bay, (Pond's Bay to Heme Bay), and 7 absent from the Western Islands. Catalogues are appended of the collection : The Musci and Lichens, by Mr. Mitten, the Algae, by Dr. Dickie, and the Fungi, by Mr. Berkeley. Observations on temperature, &c. at Point Kennedy, are added by Dr. Walker.
Hooker, W. J. and Gr. A. Walker- Arnott.— The British Mora. Ed. viii. London, 1860.
Hooker, W. J. — Curtis's Botanical Magazine. Ser. iii. vol. xvi. London, 1860.
Including Begonia frigida, DC. bearing occasionally flowers with superior carpels; Narthex Asafcetida, Falc. and Cocos ptumosa, Hk.
