48 Floristik, Geographie, Systematik etc. 



lower branches of a vast branch-system, the slender shoots are 

 phases in senescence preceding death, On this basis Plavs are 

 distinguished as younger and older. 



Other topics dealt with in an appendix include the origin of 

 „grada" or higher places of firm soil, the willow forest of the Da- 

 nube in Rumania, hsts of plants from the delta, and a new spe- 

 cies of Fraxinus {F. Pallisae). The paper is illustrated by a number 

 of photographs excellently reproduced, and a series of sections 

 of Plav. W. G. Smith. 



Standley, P. C, Chenopodiales. (N. A. Flora. XXI. 1-2. Nov. 27, 1916.) 

 Standley, P. C, Chenopodiaceae. (N. A. Flora. XXI. 3—93. Nov. 27, 1916.) 



A revision, as in the other parts of the same work, covering all 

 of Continental North America and the West In dies except for 

 the coastwise Islands of South America. The following new names 

 are published: Meiomeria, n. gen., with M. stellata, Chenopodium 

 stellatunt Wats., Chenopodium pallescens, C. inawioenum, C. hians, 

 C. nevadense, C. Pringlei, C. neoinexicanum, C. flahellifolium , C. Pal- 

 merij C. arisonicum, C. Parryij C. dacoticuni, C. dissectum {Ambrina 

 dissecta Moq.), C. vagans, C. farinosuni (C. inurale farinosum Wat.), 

 C. Salinum, Atriplex drymarioides, A. sordida^ A. moharensis (A. 

 expansa moharensis M. E. Jones), A. Rydhergii, A Hillmani (A. ar- 

 gentea Hillmani M. E. Jones), A, minuscula, A. pentandra [Axyris 

 pentandra Jacq.), A. confinis, A. glomerata S. Wats., A. domingensis 

 \Obione crispa Moq.), A. Wardii^ A. puehlensis, A. tam.picensis, A. 

 Davidsonii, A. Thornberi (A. Elegans Thornberi M. E. Jones), A. 

 cyclostegia, A. Rosei, A. Sonorae, A. Griffithsii, A. Jonesii {A. sabu- 

 losa M. E. Jones), A. Gardneri {Obione Gardneri Moq.), A. neomexi- 

 canttj A. Pringlei, A. falcata (A. NuttalUi falcata M. E. Jones), A. 

 macropoda, Endolepis dioica {Kochia dioica Nutt.), E. monilifera 

 [Atriplex monilifera Wats.), E. Covillei [E. phyllostegia Rydb., Sali- 

 cornia pacifica, S. depressa, Dondia Fernaldiij D. mexicana, D. nigra 

 {Chenopodium. nigrum Ref.), D. Torreyana {Suaeda Torreyana Wats. 

 p. p.), D. ramosissima {S. sujfrutescens Wats.), D. Palmeri, D. tam- 

 picensis, D. taxifolia (S. Torreyana Wats. p. p.) and D. brevifolia {S. 

 californica pubescens Jeps. p. p.). Trelease. 



Wernham, H. F., Tropical American Rubiaceae. — V IL The 

 Genera. (Journ. Bot. LIV. No 647. p. 322-334. Nov. 1916.) 



Of the 400 genera which at present constitute the family Ru- 

 biaceae, 182 occur in the American tropics. In the first place the 

 distribution of the genera within the area in question is dealt with. 

 In a few paragraphs, the characteristics of a Rubiaceous plant are 

 described and a diagram to illustrate the origin of the interpetiolar 

 stipules given. But the author states that „the principal object of 

 the present paper is to provide a practical means of ascertaining, as 

 readily as may be, the genus of any Rubiaceous plant native in the 

 American Tropics." With this object in view, keys have been pre- 

 pared — firstly to the tribes, and then to the genera of each tribe 

 in succession. E. M. Cotton. 



A.iisgeget>en : IT «J-ali lölT. 



Verlag von Gustav Fischer in Jena. 

 Buchdmckerei A. W. Sijthoff in Leiden. 



