Pteridophyten. — Floristik, Geographie, Systematik etc. 439 



2) The vascular supply of the abortive spike consists of two or 

 four Strands arising from the edges or the base of the gap in the 

 leaf trace. 



3) The pair of sterile pinnae following the abortive spike are 

 supplied by two pairs of Strands originating in the same way as 

 those for the abortive spike. 



4) Xylem may or may not appear in the Strands to the abortive 

 spike, but it never appears throughout the entire Strand. 



5) The diflference between the origin of the Strands to the abor- 

 tive spike from those to the fertile spike is very slight. 



6) The nature of the vascular supply of the abortive spike 

 Supports Chr5''sler's contention that it represents two fused basal 

 pinnae. Maxon. 



Cockerell, T. D. A., Some plants from the vicinity ot 

 Longs Peak inn, Colorado. (Torreya IX. p. 265— 273.Dec. 1913.) 



Contains as new: Caltha leptosepala f. chionophüa (C. chionophila 

 Greene), Cheirinia Cockerelliana {Erysiinuin Cockerelliaman Daniels), 

 C. nivalis radicata {E. radicatum Rydberg), Polemonium confertum 

 mut. alhifloruin, and Senecio rosulatus mut. primulinus. 



Trelease. 



Conard, H. S., Revegetation of a denuded Area. (Bot. 

 Gazette. LV. p. 80—84. 2 fig. June, 1913.) 



The author describes the Vegetation of railroad embankments 

 one-half mile west of Cold Spring Harbor, Long Island. The 

 invading plants are classified into those propagated by roots, by 

 pieces of rhizoms, by the entire plant or the crown with more or 

 less of roots and by seeds. Harshberger. 



Cook, O. F., Nomenclature of the Sapote and the Sapo- 

 dilla. (Contr. U. S. Nat. Herb. XVI. p. 277—285. pl. 10. 1 fig. 

 Dec. 13, 1913.) 



Applying the "method of types", it is decided that the sapodilla 

 or chicle tree is to bear the Linnean name Achras Zupota, while 

 for the sapote or mammee grande is proposed the new generic 

 name Acradelphia, under which it becomes A. mamtnosa, the 

 earlier generic name Sapota not being revived, the species not being 

 admitted to Lucuma or Vitellaria, and Calospermum and Calocar- 

 pum being rejected as homon3''ms. Trelease. 



Copeland, E. B., The genus Thayeria. (Philip. Journ. Sei. C. Bot. 

 VII. p. 41—45. pl. 1. April, 1912.) 



The author redescribes the genus Thayeria and upon the basis 

 of additional Philippine material points out the distinctness of its 2 

 species: T. cornucopia Copel., of Mindanao and Luzon, and T. 

 nectarifera (Baker) Copel., of New-Guinea. The former species is 

 here figured. Maxon. 



Fernald, M. L. and K. M. Wiegand. The genus Empetrum 

 in North America. (Rhodora. XV. p. 211-217. Dec. 1913.) 

 In addition to E. nigrutn L. and its variet)' purpureum DC, 

 two new species are recognized: E. atropurpureinn and E. Eafnesii. 



Trelease. 



