1902] CURRENT LITERA TURE 239 



polar nuclei do not fuse until after fertilization, while in Datura the fusion is 

 complete before fertilization. The usual position of the polar nuclei or the 

 tusion nucleus during fertilization is in contact with the egg. The first divi- 

 sion of the primary endosperm nucleus is followed by a transverse wall across 

 the sac, dividing it into two approximately equal chambers. In Datura this 

 is followed by other transverse walls, so that the sac consists of four super- 

 posed chambers. In both genera the subsequent divisions of the endosperm 

 cells occur in various planes and are accompanied by wall formation. — J. M. C. 



Items of taxonomic interest are as follows : Gottfried Luze (\'er- 

 handl. Zool.-Bot. Gesells. Wien 52:304-305. 1902) has described a new 

 genus {Pseuiiocalea) of Staphyleaceae from southeastern Europe. — LeRov 

 Abrams (Torreya 2 : 122. 1902) has described a new Hemizonia from Cali- 

 fornia. — N. L. Brixton {idem 123) has described a new Hydrophyllum 

 from Minnesota. — Henry Eggert {ide?n 123) has described a new Verbena 



from Texas^;^C. L. Shear (Bull. Torn Bot. Club 29; 449-457. 1902) has 



described new species of Secotium, Scleroderma, Cucurbitaria, Fusicladium, 

 Illosporium, Phragmidium. Aecidium (2), Diatrypella, Pleomassaria, Cam- 

 arosporium, and Haplosporella, and has established the following new 

 genera : Cryptoporus (formerly a section of Polyporus) and Plectroihrix 

 \ (nearest to Monosporium). — E, J. Durand {idem 458-465) has described 



' new species of Discomycetes in Ciboria (2) and Sclerotinia, — F. Lamson- 



ScRiBNER and E, D, Merrill {idem 466-470) have described new species 

 of Argrostis, Elymus (2), Festuca, Sitanion, and Trisetum.— Alice East- 

 wood (z^^/// 471-474.//. i>/) has described five new species of Nemophila from 



the Pacific coast. — Spencer LeM. Moore (Jour. Linn. Soc. Bot. 35 : 305- 



367. pL 8. 1902), in describing numerous new African Compositae, has pub- 

 lished a new genus [Artemisiopsis) of Inuloideae.— P. Hennings (Hedwigia 

 41 : 1 45-1 49. 1 902), in completing his account of the Javanese fungi collected 

 by Professor Zimmermann, has described a new genus [Discomycopselld) oi 

 Leptostromataceae. — J, M. C. 



Miss Blanche Gardner,^^ in studying cell division in root tips of Vicia 

 Faba, concludes that the nucleolus plays an important part in heredity. The 

 statement is made that "the nuclear thread dips into the nucleolus" at one 

 or several points and continues so until the nucleolus transfers itself into the 

 thread. After the nucleus has divided, nearly all the chromatin is passed 

 back and forms the nucleolus again. The conclusion is reached that the 

 nucleolus is not a nutritive center. "The nucleolus is, at least in large part, 

 a mass of chromatm material packed together in rounded form during the 

 resting stage, and during this stage it is the important chromatm center. 

 During division it becomes transformed into chromosomes. The nuclear 



'3 Observations on growth and cell division in the root of Vicia Faba. Contrib, 

 Bot, Lab. Univ. Penn. 2: 150-182. pL 3, 1902. 



