136 Descendenz und Hybriden. — Morphologie und Teratologie. 



this 0. cniclata varia. Describes a Single experiment carried 

 on with the descendents of a single individual. Having obtai- 

 ned a specimen which bore all the characteristics of the true 

 O, cniclata, the flowers were made to fertilize themselves. 

 From this but sixteen flowering plants were obtained, but enough 

 to show the whole ränge of variability of the race. Continued 

 cultivation of the forms showed tliat the descendents from typi- 

 cally cruciate mothers continued to produce atavistic and inter- 

 mediate types, while the progeny of the atavistic mothers gave 

 children which were like them. The latter, while nearly con- 

 stant were not wholly so for some cases of bud-variation 

 were seen, by which they returned to the cruciate type. A 

 table shows the pedigree of the Oenothera cniclata varla for 

 several generations. H. M. Richards (New-York). 



CUSHMAN, J. A., Studies ofLocalized Stages in some 



Plants of the Botanic Garden of Harvard Univer- 



sity. (American Naturalist. Vol. XXXVII. p. 243—259. 



April 1903. Fig. in text 1—51.) 



Treats of the leaf forms of seedlings and of the early spring growth 

 of Astragaliis adsiirgens Hall., Potentilla tridentata Ait., Geum virgini- 

 aniim L., Lamium sp. ? Artemisia stelleriana Bess., Arabis albida, Pote- 

 rium canadensis A. Gray, Ribes aiireum Pursh, Chrysanthemum speci- 

 osum, Artemisia abrotamum (Tourn.) Neck. The leaf contours in various 

 stages are considered; the seedling forms are not given in every case. 

 In closing the adventitious growths from the leaves of Bryophylliim 

 tubiflornm Harv., are spoken of, and the young plants compared with 

 the localized stages shown by seedlings. 



H. M. Richards (New-York). 



GOEBEL, Karl, Regeneration in Plants. (Bulletin Torrey 

 Botanical Club. Vol. XXX. p. 197— 205. Fig. in text 1—4. 

 April 1903. An English translation of a paper by the above 

 author, presented on invitation and read before the Botanical 

 Society of America, at Washington. Dec. 31. 1903.) 



The phenomena of regeneration are concerned in the deve- 

 lopment of dormant or latent rudiments, which may be present 

 as actual vegetative points, or as merely a disposition or ten- 

 dency to form new structures. A specific example may be 

 taken in Bryophylliim crenatum. The shoot rudiments on the 

 leaves may be induced to develop by cutting the larger vascu- 

 lar bundles, even while the leaf remains attached to the plant. 

 Also when the vegetative points, except those on the margin 

 of the leaf are, removed, the latter which usually remain dor- 

 mant, become active. In a similar way it is possible to induce 

 the formation of shoots on the leaves of Begonla Rex while 

 still in Position on the plant, though more slowly than in Bryo- 

 phylliim. Here, however, is a case where there are no definite 

 vegetative points, but merely a disposition on the part of the 

 leaf tissues to produce regenerative organs. Direct restoration 

 of plant parts takes place only when embryonic tissue is con- 



