64 BOTANICAL GAZETTE [JANUARY 
though possibly without sufficiently encouraging initiative. The book should be 
useful in classes somewhat above the grade of the first year in the high school, 
especially in those laboratories where very full directions are needed. At the 
same time, it is a question whether the author does not err, in common with 
many other writers of textbooks of this class, in giving structure complete pre- 
dominance. In the study of living things it would appear that vital processes and 
relations should furnish the motive of the course. At any rate, it is scarcely 
fair to the pupil’s perspective to relegate physiology to a few pages, in the nature 
of an appendix, with occasional references from the body of the text. One 
would prefer it to be an integral and important part of the laboratory direc- 
tions.—W. L. EDKENBERRY. 
North American flora.7—Volume XVI, part I, of this work contains an 
elaboration of the Ophioglossales-Filicales as follows: Ophioglossaceae by L. M. 
UnpEerRwoop and R. C. BENEDICT; Marattiaceae by L. M. UnpeERwoop; Osmun- 
daceae and Ceratopteridaceae by R. C. BENEpIcT; Schizaeaceae, Gleicheniaceae, 
and Cyatheaceae (pars) by W. R. Maxon. New species are described in the 
following genera: Ophioglossum (1), Danaea (1), Marattia (1), Aneimia (7), 
Dicranopteris (1), and Cyathea (4).—J. M. GREENMAN. 
NOTES FOR STUDENTS 
Chromosome reduction in Oenothera.—Davis® publishes an account of 
chromosome reduction in Oenothera grandiflora which is a strong confirmation of - 
the earlier work of GrErts? on O. Lamarckiana, and of the reviewer on O. 
Lamarckiana and a number of its mutants and hybrids, especially O. rubrinervis.° 
As regards the main facts of reduction the results are the same in all three cases, 
and even many of the finer details of the reviewer’s results are here corroborated, 
though there are evidently certain differences of behavior between O. Lamarckiana 
7 North American Flora, Vol. XVI, part I, pp. 1-88.. New York Botanical Garden. 
1909. 
8 Davis, B. M., Cytological studies on Oenothera. I. pales ene of 
Oenothera aeaee Annals of Botany 23:551-571. pls. 41, 42. 19 
9GEERTS, J. M., Be 4 zur Kenntnis der cytologischen pnt yon 
Ocenothera Lamar kiana. Ber. Deutsch. Bot. Gesells. 26a:608-614 
triage zur shins der Cytologie und der Sartilles ‘Sterilitt von 
Oenothera Epratitvstl Rec. Travaux Bot. Néerlandais 5:93-208. pls. 5-22. 1999: 
10 GATES, R. R., Pollen devel hybrid th lata X O. Lamarckiana, 
and its relation to mutation. Bor. Gazette 43:81-115. pls.2—g. 1907. 
, Hybridization and germ cells of Oenothera mutants. Bot. GAZETTE 
44:1-21. figs. 3. 
pms e reduction in Ocenothera rubrinariie. Bor, GazettE 4631-34 
pls. I-}. 1908. 
——__—., The behavior of aie pire in Oenothera lata X O. gigas. Bot. GAZETTE 
48:179-199. on 12-14. 
