37° BOTANICAL GAZETTE [MAY 
Glycogen and paraglycogen.—A posthumous paper on this subject by Prof. 
Lfo Errera‘? has been edited from his notes by Dr. J. Massart. It contains 
observations on the wide-spread occurrence of one or other of these bodies among 
the fungi, and their sparse distribution, perhaps only less observed, among the 
lower plants and animals, and possibly even among sea weeds and seed plants. 
ErrerA had interested himself in this reserve food for many years and had accu- 
mulated a great mass of bibliographical notes on it, which have been reduced 
to order and herein published. 
Epidermal gaps —Years ago MitpE and Kny and THomae described the 
occurrence of interstitial gaps in the winged bases of the leaves of three Osmundas ~ 
and a Todea, and similar gaps have been found in the epidermis of floral leaves. 
Now Lersurincer,‘" incidentally, in the course of some cytological studies, finds 
such gaps in the epidermis of the scales of Alluim Cepa, which seem probably 
connected with the secretion of mucilage —C. R. B 
Germination of moss spores——Tresoux contributes testimony upon the 
controverted question of the necessity of light for the germination of moss spores.*? 
He finds twenty mosses of the most diverse families and three liverworts, a much 
larger number than has ever been tested before, able to germinate without light 
and (contrary to HEALD’s results) without cane sugar to replace its stimulating 
action.—C. R. B. 
Haustoria of Osyris——Pizzoni has published} an extended account of the 
haustoria of Osyris alba, supplementing the note of FRAySsSsE*+ which unex- 
pectedly forestalled Pizzont’s paper after all his observations had been ennieid 
He treats of ‘the ee relations to host, contents, duration, and dimensions 
of the haustoria—cC. R. B. 
Nitrogen for maize.—Soave+s finds that nitrogen supplied to maize in ammo- 
nium nitrate does not need to undergo nitrification in order to be available, so 
that, other things being equal, this compound of nitrogen is to be preferred to 
sodium nitrate, there being no delay in assimilation as affirmed by GERLACH 
and Vocet.—cC. R. B. 
L., Glycogéne et “ Bia sak chez les “rr Recueil 
de og ae Brust I: 343-379. 
4" LEIBLINGER, G., Ueber inters s tien ene ee, in der pflanzlichen 
Epidermis. 0 Dekteck. Bot. Gesells. 23: 387-396. pl. 17. 
#* TREBOUX, O., Die Keimung der Moossporen in ihrer Sate zum Lichte. 
Ber. aoc oe Casal: 23:397-401. 1905. 
43 Pizzoni, P., oars alla conoscenza degli austori dell’ Osyris alba. 
Annali di Bot. 4: ol pl 3. 
Frayssg, A., Surla SEE etl? anatomie des sugoirs del’ Osyris alba. Compt. 
Rend, Acad. Sci. Paris 140: 270-1. 1905. 
45 Soave, M., L’azoto ammoniacale e-l’azoto nitrico nello sviluppo del mais, 
Annali di Bot. 4:99-114. 1906. 
