150 THE JOURNAL OF BOTANY 



' Nomenclature of New England Agrimonies.' — F. V. Covilie, 

 ' Home of Botn/chium pumicola' (1 pi.). — E. L. Morris, 'N. American 

 Plantaijinacea' (1 pi.). — G. N. Best, 'Revision of N. American 

 Hetet'odadium ' (2 pL). 



Gardeners'" Chronicle (2 March). — Pelargonium inaquilubum Mast., 

 sp. n. 



Journal de Botanique (" Aout " and " Septembre " 1900, received 

 26 Feb. ; *' Octobre," received 14 March). — C. Sauvageau, ' Re- 

 marques sur les Sphacelariacees.' — (Aug. & Sept.). N. Patouillard 

 & P. Hariot, 'Champignons du Senegal et du Soudan' (1 pi.). — 

 (Sept. & Oct. ). Ph. van Tieghem, ' Sur les Dicotyledones du groupe 

 des Homoxylees.' — (Oct.). A. de Coincy, 'Especes critiques du 

 genre Echium.' 



Oesterr. Bot. Zeitschrift (MsLVch). — J. Brunnthaler, S. Prowazek, 

 & R. V. Wettstein, * Vorlaufige Mittheilung iiber das Plankton des 

 Attersees.' — V. Schiffner, ' Ueber Makinoa ' (1 pi.). — P. Magnus, 

 * Zur les drichte der Untersucheidung des Kronenrostes der Graser 

 in mehrere Arten.' — R. Frieb, ' Der Pappus als Verbreitungsmittel 

 der Compositenfriichte.' 



Bhodora (March). — M. L. Owen, * Ferns of Mount Toby, Mass.' 

 M. L, Fernald, 'Northeastern Carices' (Vesicarieae).' — Id., Juncus 

 tenuis var. nov. Williainsii (1 pi.). — R. G. Leavitt, 'Embryology of 

 Spiranthes cernua.' 



Trans. Linn. Soc, 2nd S. vi. 1 (Jan.). — N. E. Brown, &c., 'Two 

 Collections made by F. V. McConnell & J. J. Quelch at Mount 

 Roraima, British Guiana' (14 pi., see p. 151). 



BOOK-NOTES, NEWS, dc. 



Under the auspices of the U.S. Department of Agriculture, 

 Mr. Newton B. Pierce has published (Bulletin no. 20) an ex- 

 haustive treatise on the disease of Peach Leaf-curl. He has been 

 engaged on the work, the results of which are here tabulated, since 

 1893. The disease has been long recognized to be caused by a 

 fungus, Exoascus deformans, which attacks the leaves and twigs, 

 causing in both cases swelling and deformation, with complete 

 destruction of the foliage and consequent loss of fruit, which 

 '^ceases to grow, yellows, wilts, and likewise falls." Mr. Pierce 

 finds that the fungus develops on the upper surface of the leaf 

 only, and that the irritation or stimulation caused by the parasite 

 induces an abnormal development of the tissues of the host, 

 resulting in the folding over and crumpling of the leaf and in 

 the swelling of the diseased branches. It was thought that the 

 mycelium harboured during the winter in the twigs and branches 

 of the trees, and tbat in spring it developed with the growth of the 

 leaf. 



