104 BOTANICAL GAZETTE. [ April. 
AN ARTICLE ou namie pe a botany read same the Western N. Y. Hor see 
Phos ‘ he eopies have been distributed, Dr. E. L vant Sent th 
words spiro comet pie soatens to paint respectiv ay cole spec dha vegetable wae 
ture. is pointed out that the latter deals with plants which } a pedigree, being 
mostly raised each year from seed, while the former deals gees sens velba: a pedigree, 
but with only a parentage, being mostly propagated by division. The one class of plants 
. Sturte 
reproduces the various forms from eps with much perms whieh ure properly apiece: 
varieties, the other not bein eget oe -_ with ertainty ngs not 
the forms called varieties, bu t vi Whenever a V neh variation occurs a % 
propagated indefinitely by Heuan : iad it no be ae of auction by seed, it 
true variety. 
THE FIRST NUMBER of a new quarterly journal devoted to alge, ealled Notarisia, has 
just appeared. It proposes to treat of the current bibliography of tect sie arse ol igettan cal 
science, to collate Terenenices sand Latin descriptions of new species, t ce 
tion between algologists, and to some extent to publish original articles. The journal is 
a to be truly international; communications will be published in Italian, Freneh, 
or Latin. The price will vary a Siting to the required size, but will not exceed fifteen 
four octavo pages with heliotype portrait of De Notaris, to whom the journal is dedicated. 
It nino cng an appease of eight pages bythe tao ae eerie a the genera of Flori- 
dex. There is nd this gives promise of meet- 
ing the want. 
OPPORTUNITY is again offered to any who oe — peer the whole or any part of the 
Flora Danica, This ificent work was commen the latter part of the last cen- 
tury, and has been published by the Mberatity of a ing of Denmark. It is now com- 
Lips excepting the index, and it is dpe to reprint such parts as may be called for. 
nd over three mpg nts representing 4000 
and. Single 
pia co , for 55 fr. 
mene ue bie fad a be made when 10 or more sinikaes are ordered. The editor 
also proposes to issue fro : 1. Icones Fl 
landicx a of 330 plates with text, price, uncolored, 65 fr. 50 ¢. or, colored, 250 fr- 
c.—2. ore andinavicum, illustrations of the trees and shrubs of Denmark, Norway 
and Sweden, 160 plates, uncolored 40 fr., colored, 126 fr.—3. Icones plantarum tea 
Scandinavizx, 300 plates, uncolored 60 fr., colored, 240 fr. Those who wish to obta y of 
these works or the whole or part of the Flora ic should Seg ey their es to 
the editor Dr. Joh. Lange, oo Vej 5 (V.) or to MM. Lehmann & Stage, Klarebo- 
derne 3, Copenhagen K. ‘a Groenland ee will be aoweale valuable to North 
git bol 
E LEARN FROM the Bulletin de la Société de France that S. Groslik has been carrying 0 
experimen ts to determine the influence of light upon the development of the leaf- tig Rs 
ehyma. He selected for the semana the leaves of Eucalyptus globulus which tests 
three Tedindt's stages of developmen 
of isodiametric cells, whieh the nthor designates as “ ‘primitive mesophyll.” de in, the sec- 
faces. In the third stage the leaf is horizontal and has a layer of palisade parenc enya 
usual only under the upper surface, the palisade of the ons Ae having gradually te 
transformed into spongy parenchyma. M. Groslik ho 
4 
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this: Takinga in th ase of developme aes he kept itina oases 
whet it developed pali: eran pa on the upper face. Keeping a leaf in the second sta: 
(i. e-, one having palisade on both surfaces) in a constantly vertical position the inferior 
y parenchyma. The ropeact owns ene 
that from tive mesophyll of the ‘leat either s or palisade 
veloped and parler te oie character of this adult mesophy eaent ont) on the er iiieckpation 
ast Spt Cie illumination prortag he development Be, paisa and cern fav roring the 
os miorening end enn Ue mica th laboratory demo: 
