488 Floristik, Geographie, Systematik etc. 



cussed. Acomastylis must be kept separate from Sieversia as well as 

 from Geiim. Cowania mexicana DC. is confined to central Mexico, 

 some remarks on other species of the genus are added. The three 

 species, proposed in the genus Fallugia cannoi be distinguished. 

 The paper further contains remarks on the question of the priority 

 of Kuntsia versus Purshia, on Chamaehatia anstralis (Brand) Abrams 

 and on different species of Cercocavpus (distribution and nomencla- 

 ture and hybrids between C. ledifoUiis and C. macrurus. It seems 

 that a hybrid between the first species and C. arisonicus has been 

 found). Jongmans. 



Sargent, C. S., Crataegus in New York. 66 ^i^ Annual Report 

 New York State Museum. (1912), Vol. II, 1914. (Univ.State 

 New York Bull. W 550; Mus. Bull. 167. p. 53—124.) 



This paper contains the description, notes on literature and 

 the distribution of the species of Crataegus occurring in the State 

 of New York, with a key to the determination of the species. 

 A number of new forms are described (english diagnoses). 



New names: C. crus-galli L. var. ruheiis, C. eastma-nniana, C. 

 hroxcnietta , C. obstipa, C. pallescens, C. pelacris, C. latiflora, C. scitula, 

 C. russata, C. placiva n. nom., C. secliisa, C. perspicahilis, C. had- 

 leyana, C. paineana, C. uticaeiisis, C. gilhertiana, C. perrara, C. hun- 

 tiana, C. jnaiabella, C. proctoriaiia, C. tnaligna, C.fallsiana, C. niisella, 

 C. knieskerniana , C. tniculenta, C. sonnenbergensis , C. spinea, C. og- 

 densburgensis. Jongmans. 



Sapgent, C. S., Plantae Wilsonianae. An enumeration of 

 the Woody plants collected in Western China for the 

 Arnold Arboretum of Harvard Universityduringihe 

 years 1907, 1908 and 1910 by E. H. Wilson. (Publications 

 Arnold Arboretum, N^. 4. II. 2. p. 263—422. 1915.) 



This part again contains descriptions of numerous new species 

 and varieties chiefly from the Wilson expedition, but also from some 

 other expeditions in Eastern-Asia, the material of which was not 

 yet described and published. In most of the cases those species 

 which are already known, are mentioned by name onlj^, with a 

 list of the localities. In many cases one finds their synonymy and 

 in other cases some or more remarks. 



Rosaceae Subfam. Poinoideae by A. Reh der. 



Pyrus serotina Rehder, 1915 (Remarks; P. sinensis Diels is pro- 

 bably referable to this species, if not to P. serndata). 



Sorbus pallescens n. sp., most closely related to 5. cuspidata 

 Hedlund, which is easily distinguished by the larger leaves white- 

 tomentose beneath, by the larger inflorescence and by the larger 

 lenticellate 3 — 5 celled fruit. It may also be compared with 5. Aria 

 Crantz, which differs in the broader distinctly lobulate leaves more 

 densely white-tomentose beneath including the veins and petioles. 

 in the much larger many-flowered inflorescence, longer sepals, and 

 in the larger fruit with the persistent sepals incurved. 5. niegalo- 

 carpa n. sp. This species does not seem to be closely related to any 

 other Sorbits. In the inferior ovary and in the 3—4 styles connate 

 below the middle, it agrees with 5. Hedlundii Schneider, but differs 

 from it in the much larger russet-colored fruit and the glabrous 

 leaves which resemble certain species of the section Micromeles as 

 S. aronioides Rehder and 5. nieliosmifolia Rehder. S. niegalocarpa 



