168 Bryophyten. — Pteridophyten. — Floristik etc. 



Trabut. Riella bialata Trab. (Revue bryol. 1909. p. 44.) 



Nachdem die Beschreibung dieser neuen Spezies aus Algerien 

 (in „Revue bryologique". 1908. p. 96) vom Verf. veröffentlicht wor- 

 den ist, fügt er jetzt die Abbildung hinzu, A, der jungen Pflanze 

 und B, einer solchen mit ihren beiden Flügeln, von oben gesehen. 



Geheeb (Freiburg i. Br.) 



Benedict, R. C, New hybrides in Drvopteris. (Bull. Torrey bot. 

 Club. XXXVI. p. 41—49. January, 1909.)^ 



Following a general discussion of hybridity in ferns with espe- 

 cial reference to the relative importance of various characters in 

 determining parentage, the writer presents diagnoses of the following 

 new discoveries, here first described: 



Dryopteris cristata X spinulosa Benedict, the type from Connec- 

 ticut, other specimens from Vermont and New York; D. cristata 

 X Goldiana Benedict, the type from Pennsylvania; D. Goldiana X 

 spinulosa Benedict, the type from Pennsylvania; (syn. Nephrodium 

 cristatum Clintoniainim forma silvaticum Poyser, 1908); D. interme- 

 dia X marginalis Benedict, the type from Solvay, New York, and 

 known also from Massachusetts and Vermont. 



The author treats the subject historically also. Of the possible 

 15 hybrids among Dryopteris Clintoniana , D. cristata, D. Goldiana, 

 D. intermedia, D. marginalis and D. spinulosa, all have now been 

 found. Of this number 11 have now been described, the remaining 

 4 being held at present for further study. Maxon. 



Benedict, R. C, Notes on ferns seen during the summer of 

 1908. (Torreya. VIII. p. 284—286. Dec. 1908.) 



A second locality for the recently described hybrid Dryopteris 

 Goldiana X marginalis Dowell, in the Green Lake region of Cen- 

 tral New York. 



Two new localities for Dryopteris simulata Davenp. in northern 

 New York are mentioned, a considerable extension of ränge. 



Notes upon Dryopteris dilatata (Hoffm.) Gra3\ which is believed 

 to be distinct from D. spimdosa and D. intermedia. 



Two aberrant forms of Osmunda cinnamomea are briefly de- 

 scribed. Maxon, 



Avebury, Lord On Seeds, with special reference to British 

 Plants. (Journ. Roy. Microsc. Soc. Part. III. p. 273—304 with pl. 

 IV and figs. 67—85, 1908.) 



Brief notes cn typical seeds of almost every British natural 

 Order; most of the facts given are already known. The figures are 

 reprints from the author's "British Flowering plants". 



W. G. Smith. 



B[ean], W. J., Rhus Toxicodendron. (Kew Bull. X. p. 455— 456. 1908.) 



Considerable interest has recently been displayed, in Great 

 Britain, in the toxic properties oi Rhus Toxicodendron. Due partly 

 to an erroneous "newspaper description" of Ampelopsis Veitchii this 

 harmless plant was confused by some with the climbing form of 

 Rhus Toxicodendron, which some years ago was distributed from a 

 nursery as Ampelopsis Hoggii. 



