472 BOTANICAL GAZETTE [DECEMBER 
some interesting matter concerning the condition of forestry there. There 
are between 600 and 700 native arboreal species of which there is some 
information, but there is great confusion in both scientific and popular names. 
Considerable work has already been done in ascertaining the condition of the 
forests in various parts of the Island.— H. N. WHITFORD. 
ALEX. ARTARI, has been studying the relation of chlorophyll to light in 
some algae, especially Stichococcus.*3 The development of chlorophyll in 
the dark is possible only when the nutrition is good. Similarly chlorophyll 
often vanishes in the light under highly favorable nutrition conditions. 
Artari thinks that the disappearance of chlorophyll in the phylogenetic devel- 
opment of parasites is thus a matter of nutrition and bears no relation to light. 
—H. C. CowLes. 
NEMEC ™ has compressed the growing.apices of shoots of Vefeta macran- 
tha, and studied the effects on the leaf primordia. By preventing the growth 
of one the position of these is usually modified but in one experiment the 
phyllogenous tissue was extended beyond the normal. As was expected, the 
number of rows of leaves was not modified. It may be remembered that 
Véchting found the number of rows of leaves of some cacti dependent on the 
illumination and changeable with it.— E. B. COPELAND. 
V. KINDERMANN® has confirmed the results of Leitgeb and Molisch as to 
the resistance of guard cells, and added new data. Many agents were 
employed, such as acids, alkalis, harmful vapors, illuminating gas, desicca- 
tion, lack of oxygen, and in every case guard cells are found to be more 
resistant than other cells. They sometimes remain alive for several days 
after the death of other leaf cells. The author thinks this resistance is not 
referable to the cell wall, but is a property of the cytoplasm.—H. C. COWLES. 
Ep. GRIFFON, whose previous studies on chlorophyll are well known, has 
reinvestigated some of Boussingault’s results,*® from which it has been com- 
monly supposed that the synthetic power of the palisade cells far exceeded 
that of the spongy parenchyma in ordinary leaves. The earlier results are 
confirmed in a general way, though the difference is much less than Boussin- — 
gault thought. The maximum difference in favor of the palisade was found 
to show the ratio of 100 to 54 instead of Boussingault’s 6 tor. The ratio is 
™3ARTARI, ALEX., Ueber die Bildung des Chlorophylls durch griine Algen. Ber. 
Deutsch. Bot. Ges. 20: 201-207. 1902. 
™ NEMEC, B., Ueber den Einfluss der mechanischen Factoren auf die Blattstellung. 
Bull. Internat. Acad. Sci. Boheme. 1903, 14. 
™ KINDERMANN , Uber die hres Widerstandskraft der paige 
gegen schadliche echiaa Sitzb. Akad. Wiss. Wien. Math.—Nat. Classe, Abth. 1 
III: 490-509, 1902. 
*©GRIFFON, ED., Recherches sur |’assimilation chlorophyllienne des feuilles dont 
on éclaire soit la face supérieure, soit la face inférieure. Compt. Rend. 135: 3°37 
305. 1902 
