498 Anatomie. — Biologie. — Varietäten etc. 



Je stärker die mechanischen Elemente dieser Streife im Jugendzu- 

 stande des Triebes sind, desto grösser und ansehnlicher wird der 

 Korkflügel. Matouschek (Wien;. 



Lindhard, E., On Amphicarpy in Sieglingiia decumbens (L.) 

 and Danthoiiia breviavistata (Beck.). (Bot. Tidsskr. XXIX. 1. 

 Köbenhavn 1908. ö pp. 5 flg.) 



In the third year after germination Sieglingiia developes the fio- 

 wering and Iruiting culm. Upon this culm, at the base of the first 

 feebl)^ prolonged (and su^-^terranean) intcrnode is situated a big 

 intravaginall}^ developed bud, inclosing and completelj^ covering a 

 rather reduced spikelet which usually gives fully developed seed. 

 Short-shoots in the assimilating State verj^ seldom contain subter- 

 ranean floral buds. On the other hand two or three such buds may 

 be found in succeeding nodes on the same culm, and then the one 

 or two uppermost usually do not give fully developped seed. 



The bud consists of the twokeeled prophyllum and a small spi- 

 kelet without glumae but with fully developed paleae. The spikelet 

 is one- or two-flowered; in one-flowered spikelets rudiments ot a 

 second fiower are offen found. The seeds vary much in size and 

 shape, most subterranean seeds however are bigger than those of 

 the terminal panicle. 



The subterranean seeds have not been observed germinating in 

 the field, but experiences have shown that these seeds are as good 

 as are the common seeds. 



Danthonia breviavistata {D. calycina X Sieglingiia decumbens) 

 has subterranean inflorescences as those of Sieglingiia, but of the 

 named hybrid the material at hand was very scarce. 



Ove Paulsen (Copenhagen). 



Warming, E., Field-notes on the biology ofs.ome ofthe 

 Faeroes. (Botany of the Faeroes III. p. 1055—1065. Copenhagen 

 and Christiania 1908.) 



Observations regarding floral biology of a number of faeroese 

 plants, accompanied by a list of insects living upon the Faeroes. 

 (by J. C. Nielsen). Oven Paulsen (Copenhagen). 



Cook, O. F., Reappearance of a Primitive Character in 

 Cotton Hybrid s. (Circ. XVIII, Bur. Plant Ind. U.S. Dept. Agric. 

 (Washington, D. C), 11 pp. 23 Nov. 1908.) 



This circular gives some incidental results of experiments under- 

 taken for the purpose of acclimatizing in the United States cer- 

 tain Central American varieties of Cotton resistant to the 

 BoU Weevil. 



Primitive characters may be reversionary or recapitulator}^ and 

 though these two groups of phenomena have been considered as 

 being very distinct in nature, evidence is presented in the present 

 paper to show that the relation between reversion and recapitulation 

 is very intimate and that the one may pass into the other as a 

 result of hybridization. 



Reversion is the reappearance of a character which has been 

 transmitted in latent form — that is, without being brought into 

 expression in the parent generation or in the immediately preceeding 



