BOTANY. 957 



Concerning the systematic description and geographic distribution of the 

 Pomaceee, V. Foi.cnkii (Ocilnr. Hoi. Ztxrhr., 17 { ISni), Xo. I, pp. 117-ll'i, jil. 1). 



Concerning some leaf structures, ('AiiiKitixK Komauoii' {lUd. Herb. Jioinsier, 

 5 (ISO?), Xo.4,2U>- S:'l-:>',1, Jujx. 7.M.— Aiiatoiiiifiil studies of tlu> structure of the pet- 

 ioles of the leaves of se\ oral species of poplar, willow, and other plauts are giveu. 



Concerning the tubers and roots of Cyclamen, V. Hildkbijano (HhI. Herb. 

 lioisHicr, 5 {1S07), Xo. 4, pp. 25.2-2'>7). 



Concerning cytoplasm structures, nuclear and cell division, V.. Stkasuukckk 

 {.falirb. «-(SN. /,'()/., 30 (IS97), Xo. 2-3, pp. ,17.',-4(l'i, fuju. 2). 



Notes on underground runners, Ida A. Kkllkk ( I'ioc. I'hil. AnuL Xal. Sci., lSf)7, 

 /, pp. 161-160, pi. 1). 



Structure and physiology of the cell, M. M. Tswett {Arch. AV/. /'/i//.s. <l Xat. 

 Sci., 1S96; ahs. in Jour. Roij. Micros. Soc, lSn7, II, }k 134). 



Nuclear division and fxuiting of Fucus, E. Stkasiukciku (./«//;•/). iri.s.v. Hoi., 30 

 (!Sn7), Xo. 2-3, pp. 301-374, ph. 2). 



Nuclear division in the pollen mother cells of some decotyledons and mono- 

 cotyledons, I>. JI. MoTllKi; (Jalirh. iciss. Hot., 30 (ISO: ), Xo. 2-3, pp. l(;3-204, ph. .1). 



Nuclear and cell division in the Sphacellariaceae, W. T. Swi.\(;i.i': (.fahrh. irin8. 

 Hot., 30(IS97), Xo. 2-3, pp. 297-330, ph. 2). 



Nuclear division and fruiting in Basidiobolus ranorum, !>. (i. I'aii.ciiii.d 

 (Jalirh. wiss. Bot., 30 (1397), Xo. 2-3, pp. 233-29::, pl'i. 2). 



Nuclear division and cell formation in asci, R. A. IIaki-eu (Jalirh. irix.'i. Hot, 

 30 (1S97), Xo. 2-3, pp. 230-2S4, ph. 2). 



Nuclear division in Chara fragilis, B. Dkhski {Jahrh. wiss. Hot., 30 {1897), Xo. 

 2-3, pp. 227-249, pis. 2). 



Nuclear division in the pollen mother cells of Hemerocallis fulva, li. < ). Jiikl 

 (Jahrh. wiss. Hot., 30 (1897), Xo. 2-3, pp. 2n3-2:.'(:, pis. 3). 



Effect of different degrees of shade on plant growth, E. (iiTicxiKU (Her. Kaux 

 et Foret, ser. 3, 1 (1897), Xo. 7, pp. 193-206). — The author distiugiiishes between three 

 degrees of shading and discusses the effect of each upon jiLiut growtli. 



On the assimilatory energy of the blue and violet rays of the spectrum, 1\ G. 

 Koin. (Her. dent. hot. Ces., 13 (1397) Xo. 2, pp. 111-124, fuj. 1). 



Concerning the physiology of the leptomin angiosperms, F. C/ai-kk (Ikr. diut. 

 l)ot. ilea., 15 (1897) Xo. 2, pp. 124-131). 



Alternation of generations (Gard. Chron.. ser. 3, 21 (1897), Xo. 339, pp. 272, 27S, 

 fujs. 2). 



The nutrition of plants, T. F. Hanatskk ( Wiener Ulna. Cart. Zig., 22 (1897), Xo. 4, 

 pp. 117-126). — An address in wliich the subject of plant nutrition is reviewed and the 

 present opinions briefly outlined. 



Formation and dissolution of hemicellulose, .1. GKi'.s.s (Biblotheca Ilolanica 

 1896, Xo. 39, pp. 15, pi. 1 ; alis. in Jour. Hoi/. Micros. Soc, 1897, II, p. 145). 



Endoderm and pericycle in Trifolium, S. Hkli.i (Mem. Accad. Sci. Torino, 46 

 (1896), pp. 303-441, pis. 6; ahs. in Jour. Hoy. Micros. Soc., 1897, II, p. 136).— \ study 

 was made of Trifolium and a gcn(!ral criticism is given of van Tieghcm's stele theory. 



Concerning the deposition of silica by plants, E. Kusteu (Her. deut. hot. (ies., 

 15 (1897), Xo. 2, pp. 136-138). 



Studies on the hypertrophy produced by Rcestelia lacerata on the leaves, 

 branches, etc., of Crataegus oxyacantha, \. I'okcki.i.i (Hir. pal. ley., 5 (1896), 

 Xo. 5-8, pp. 245-252, pi. 1). 



Hypertrophy and anomalous nuclear division induced by plant parasites^ 

 F. Cavaha (Riv.pat. f'cr/., 5 (1896), Xo. 5-8, pp. 238-Ml, fu/s. 3). 



Concerning the origin of the karyokinetic spindle in Equisetum, W. .1. V. 

 OsTKRiioiT (Jahrh. wiss. Hot., 30 ( 1897), Xo. 2-3, pp. 159-168, ph. 2). 



Encapsuling of starch grains, L. Uuscalioxi (Malpiyhia, 10 (189G), pp. 479-4S9, 

 pi. 1). — The author reports linding a rapidly forming capsule around the starch 

 grains in the third layer of the integument of Vicv.i narhonensis and other legumes, 

 aa Well as Kschschollcia cuHl'oruica. 



