186 REVIEWS. 



seeds, and truly accumbent cotyledons; Tlielypodium, for 

 those with more or less terete pods, narrow seeds, and more 

 or less incumbent cotyledons. 



We are bound, moreover, to take steps for the suppression 

 of a nominal species which is here introduced in consequence 

 of our own short-sightedness. In an evil moment we gave the 

 name of Smelowshia ? Californica to a plant of Professor 

 Brewer's collections, thought to be perennial, with exceedingly 

 short few-seeded pods. This Mr. Watson identified with a 

 common Sisymbrium of the region, distinguished from S. 

 ccmescens by its seeds, strictly in a single series, and transfer- 

 ring the name, calls it S, Californicum. He had overlooked 

 an article in this Journal (for September, 1866) upon this 

 Sophia group of Sisymbrium, from which it would have been 

 seen that the plant in question is Sisymbrium incisum of 

 Engelmann, and the later S. longipedicellatum of Fournier, 

 besides one or two other names of the same author more or 

 less strictly referable to it. 



DECAISNE'S MONOGRAPH OF THE GENUS PYRUS.^ 



A VOLUME of Decaisne's great work — or rather of one of 

 his great works — " Le Jardin Fruitier du Museum, un Icono- 

 graphie de touts les Especes et Varietes d'Arbres Fruitiers 

 cultives dans cet Etablissement," etc. (produced in first-rate 

 style by Firmin Didot Freres), devoted to the genus Pyrus, 

 is now before us. It is a complete monograph of the species 

 of this genus, taken in its restricted sense, illustrated by 

 figures of the wild types, and also of the cultivated races of 

 those cider-pears known in France under the name of Sanger. 

 There is a list of the cider-pears cultivated in the different 

 provinces of France, a general alphabetical catalogue of all 

 the published varieties of pears, and a table in which the sj^n- 

 onyms are referred to the names severally adopted. The 

 other volumes, and the illustrations of the edible varieties of 

 1 American Journal of Science and Arts, 3 ser., iv. 489 ; x. 481. 



