236 BOTANICAL GAZETTE [SEPTEMBER 
recognizing 42 species, 6 of which are new.—C. H. KAurrman (Bull. Torr. Bot. 
Club 32: 301-325. figs. 7. 1905) has published a preliminary study of the genus 
Cortinarius, illustrated by half-tones from excellent photographs, in which, after 
a full description of the structure of the various parts, 7 new species are described. 
—E. L. GREENE (Pittonia 5: 205-308. 1905) has published a revision of Esch- 
scholtzia, recognizing 112 species, 88 of which are new, thus breaking up what 
seems to have been a great aggregate of species collected under a few names; has 
published Petromecon as a new genus of Papaveraceae from Guadalupe Island, 
founded on Eschscholtzia Palmeri Rose and containing a new species; has pre- 
sented a synopsis of Dendromecon, recognizing 17 species, 14 of which are new; 
and has suggested an extension of species under Sanguinaria by separating 4 new 
species from what has been treated as a monotypic plexus.—C. A. M. LinpMan 
(Arkiv. Bot. K. Svenska Vetensk. 3: no. 6. pp. 14. figs. ro. 1904; rev. in Bot. 
Centralbl. 98:659. 1905) has published a new genus (Regnellidium) of Marsili- 
aceae from southern Brazil, which combines certain features of the two other 
genera with characters of its own.—M. L. FERNALD (Rhodora 7:129-136. 1995), 
in continuing his presentation of the N. Am. species of Eriophorum, has discussed 
the generic status of Eriophorum and the status of the names E. Chamissonis 
and E. Callitrix-—J. M. C. 
Frrrinc’s*® full paper has recently appeared; an abstract of his preliminary 
report may be found in the January GazerTE of this year. It is difficult to find 
an unnecessary paragraph among the one hundred seventy-five pages of this 
notable paper. Considerable ingenuity is displayed and this accounts for the 
author’s success in reaching a much closer analysis of geotropic phenomena. 
Part I contains eight chapters exclusive of introduction and recapitulation. 
Description and explanation of apparatus constitute the first chapter. Elaborate 
cuts and diagrams contribute to a very clear presentation. Particularly satisfying 
is the second chapter, because here is answered the very fundamental and gi 
controverted question of optimum position. CzAPEK’s answer of I 35° deviation 
m position of normal equilibrium is proven incorrect, and the horizontal posi- 
tion of 90° deviation is demonstrated to be the optimum position for the plants 
tested. The variety of the latter is great enough to make a general statement for 
Parallelotropic organs very probable. Positions at equal angles above or below 
the horizontal afford equal stimulation. The latter conclusion has already received 
confirmation in that the contrary conclusion of NEWCOMBE has been withdrawn, 
and evidence presented by him to support the author. Moreover the intensity 
of stimulation as determined by position varies approximately as the sine of the 
angle of deviation. In Part II the investigation endeavors, on the basis of seta 
Strations in Part I, to penetrate further the complicated processes involv anes 
perception and response. Admirable caution is here manifest, a clear ssa 
ination between demonstration and probability being maintained. The autho 
16 Firtinc, Hans, Untersuchungen iiber den geotropischen Reizvorgang: Teles 
II. Jahrb. Wiss. Bot. 41: 221-398. 1905. 
* 
