334 Pteridophyten. — Floristik etc. 



(Angola), differs from L. lanceolatum (Sw.) Presl in the shape of 

 the frond, which has an almost uniformly broad central part; the 

 texture is thicker, and the stipe much longer. L. Fanriei (Formosa), 

 differs from L. lanceolata in the paleae, in being more coriaceous, 

 and most conspicuously in the sori. From L. malayana, it differs 

 most notably in not being winged to the base; and the fronds are 

 more scattered and more coriaceous. L. malayana nom. nov. (An- 

 throphyum lanceolatum Bl. non Grammitis lanceolata Sw.). This spe- 

 cies is decidedly taller than L. lanceolata (Sw.) Presl, broadest near 

 the tip, then less acuminate, and winged nearty or quite down to 

 the insertion on the rhizome. The sori are spreading, and imbricate 

 when in füll fruit, and may reach nearly to the margin. 



Jongmans. 



Charaberkün, C. J.. Stangeria paradoxa. (ßotan. Gazette. LXI. p. 

 353—372. PI. XXIV— XXVI. 1 Fig. 1916.) 



This paper, which is, like several earlier papers on c} T cads, 

 largely descriptive, contains sorae field observations on the cccur- 

 rence of Stangeria and the description of the structure and develop- 

 ment of the sporangia, and the gametophytes, and observations on 

 fertilization and the embryogeny. The results are summarized as 

 follows. 



Stangeria is probably monotypic, with 5. paradoxa as its Single 

 Polymorphie species. 



At fertilization there is a pairing of chromosomes resembling 

 the pairing in the heterotypic mitosis, so that the number during 

 the metaphase of the first division is apparently haploid, although 

 really diploid. 



There are two free nuclear periods in the embryogeny, the 

 first comprising 9 or 10 simultaneous mitoses and extending through- 

 out the proembryo, and the second with only 2 or 3 mitoses and 

 confined to the lower part of the proembi^o. The embryo and 

 suspensor are formed from the second series. 



There is an evanescent segmentation of the entire egg, as 

 in Dioon. 



The young embryo is very narrow and its haustorial struetures 

 are more conspieuous than in any other cycad yet described. 



Polarity, which may appear even at the beginning of embryo- 

 geny, becomes more and more marked as development proeeeds. 



Jongmans. 



Chase, A., The structure of the spikelet ot Aphanelytrum. 

 (Bot. Gazette. LXI. p. 340-343. 1 Fig. 1916.) 



The genus Aphanelytrum was placed by Hackel as a subgenus 

 to Brachyelytrum. New collections of the Single species, A.procum- 

 bens, proved that this opinion is not right but that the genus 

 belongs to the tribe Festucaceae. A new description of the genus 

 is given at the end of the paper. Jongmans. 



Gagnepain, F., Combretum et Terminalia: leurs caracteres 

 distinetifs. (NotuJae systematicae. III. 9. p. 281 — 283. 1916.) 



Les deux genres Combretum et Terminalia sont tres voisins. Le 

 caractere difförentiel que les Combretum sont pötales et les Termi- 



