912 EXPERIMENT STATION RECORD. 



The university botanic garden, J. B. Davy {California Sta. Bpt. 1808, pp. 252- 

 255). — Brief notes are given on the donations to the botanic garden and lists are given 

 of donors and materials received. 



Notes on plants received for identification, J. B. Davy {California Sta. Rpt. 

 1898, pp. 256-261). — Notes are given on a number of plants received from different 

 localities, in which suggestions as to their economic value are added. 



The common origin of the tissue of leaves and stems in phanerogams, L. 

 Flot {Compt. Rend. Acad. >Sci. Paris, 131 {1900), No. 27, pp. 1310-1322, Jigti. 3).— 

 A morphological study is given in which the various tissues are traced from the stem, 

 through the liuds into tlie leaves. 



The influence of root curvature on the distribution and arrangement of 

 roots, F. Noll {Landir. Jahrh., 29 {1900), No. 3, j)i>. 361-426, ph. 3). 



Concerning Anthophaein, a brown coloring matter of flowers, M. Mobius 

 {Ber. Deut. Rot. Gesell, 18 {1900), No. 8, pp. 341-347).— Aw account is given of the 

 separation by the author from the dark brown portions of the flowers of Viciafaba of 

 a coloring matter, to which the name Anthophaein is given. A similar substance is 

 found jiresent in many brown flowers. 



The presence of dextrose and levulose in the leaves of the sugar beet, L. 

 LiNDET {Sun: Indig. ct CoIoniaJc, 55 {1900), No. 17, pp. 523-529). 



A new^ glucosid occurring in the seed of Erysimum, Schlagdenhauffen and 

 Reeb {Compt. Rend. Acad. Sci. Paris, 131 {1900), No. 19, pp. 753-75.5).— The authors 

 have separated from a number of species of Erysimum a new glucosid, to which the 

 erysimin is given. Its chemical and physiological action are indicated. 



Concerning the eff"ect of hydrochloric acid upon the assimilation of plants, 

 C. WiELER and A. Hartleb {Ber. Deut. Bat. Gesell., 18 {1900), No. 8, pp. 348-358).— 

 As a result of investigations upon a number .of plants, the author found that an 

 atmosphere containing 1 part hydrochloric acid to 500,000 reduced the power of 

 assimilation from 50 to 60 per cent. 



Digestion in the leaves of nepenthes, G. Clautriau {Extract Mem. Acad. Roy. 

 Bclg., 59 {1900), pp. 55). 



Concerning the cause, size, number, distribution, and function of tubercles 

 on the roots of leguminous plants, L. Hiltner {Arb. K. Gesundhcitsamte, Biol. 

 Abt., 1 {1900), No. 2, pp. 177-222, pi. 1). — A critical review is given of the literature 

 relating to this subject, in which the present status of the knowledge regarding root 

 tubercles and their function is summarized. 



The morphology and physiology of Mycoderma cucumerina, B. Heinze 

 {Landw. Jahrb., 20 {1900), No. 3, pp. 4^7-466, ^jfe. 3). — Studies are given on the 

 morphology and physiology of this common mold, which occurs as a gray or grayish 

 white mass upon solutions containing sugar or alcohol. 



The growth and abnormal formation of conidia of Dematium pullulans, 

 A. K LOCKER and H. Scuionning {Compt. Rend. Travaux Lab. Carlsberg, 5 {1900), No. 

 l,pp. 47-57, figs. 6). — It was found that Dematium pullulans and other species of 

 fungi, under similar conditions of growth, form their conidia in the interior of cer- 

 tain cells. The conditions causing this abnormal formation are lack of nutrition and 

 too abundant humidity. 



The capacity of fungi to absorb humin substances, F. Reixitzkr {Bot. Ztg., 

 1. AM., 58 {1900), No. 4, PP- 59-73; abs. in Jour. Roy. Micros. Sac. {London'], 1900, 

 No. 6, p. 702). — The author limits the term humus to those substances which are com- 

 pounds of humin and confirms Hoppe-Seyler's statement as to their extreme power 

 to withstand decomposition under ordinary circumstances. This, however, accord- 

 ing to the author, applies only to the power of living organisms to extract carbon 

 from the humus. If anotiier source of carbon, as sugar, be present, Penicillium has 

 the power of obtaining its nitrogenous constituents from humus, which must therefore 

 be regarded as a source of nitrogen for soil organisms. 



