168 BOTANICAL GAZETTE [AUGUST 
blade, while its terminal limit is difficult to determine, because growth gradually 
decreases toward the tip of the blade. 
A second paper, by Miss SHELDON,’ deals with the growth of the stipe. 
It was found that the region of maximum growth in mature plants is 2-4 feet 
below the blade, the rate decreasing in both directions. In July the rate of 
growth was found to be about an inch a day.—J. M. C 
Ferns of the oriental tropics.—The richness of the fern vegetation of the 
tropics is being emphasized by the work of CopELAND.” In the papers cited, 
new species are described in the following genera: Adiantum, Aglaomorpha (a 
new subgenus Holostachyum, including two other species, being described), 
Angiopteris, Asplenium, Athyrium (6), Balantium, Cyathea (6), Davallia, Dryop- 
teris (6), Leptochilus, Loxogramme (2), Marattia, Microlepia, Oleandra, Ophio- 
glossum, Polypodium (8), Prosaptia, Pteris, Tectaria (4), Trichomanes, and 
Vittaria. The genera Diplora and Triphlebia were found to be invalid, because 
founded upon inconstant and “‘illusory”’ features, and should be included in 
Phyllitis, which comprises only three well defined species in the Malay- 
Polynesian region.—J. M. C 
Sphagnum bogs of Alaska.—Ricc™ has noted the peculiarities of the 
flora of some Alaskan peat bogs and finds that while sphagnum occurs in many 
different habitats in Alaska, only where there is an absence of drainage do 
bogs accompany it. e peat in the bogs visited had a maximum depth of 
only 2.5 ft. Aside from the sphagnum, Empetrum nigrum is the most abun- 
dant and uniform in its occurrence, but Ledum palustre, Kalmia glauca, Oxy- 
coccus oxycoccus, and Drosea rotundifolia are among other characteristic 
species. The bogs occur surrounded by treeless areas, a! tundras, or by 
coniferous forests, and vary much in area.—Geo. D. FULLER 
9 SHELDON, SARAH M., Notes on the growth of the stipe of Nereocystis Luetkeana. 
Ibid. 1:15-18. 1915. 
%0 COPELAND, E. B., The ferns ~ the Batu Lawi Expedition. Appendix If. 
_ Roy. Agric. Soc. (Straits Branch). no. 63. 71-72. 1912. 
—-*, Some ferns of rane ey Mindanan. Leaflets Philipp. Bot. 5:1679- 
1684. 19013. 
———, Notes on some Javan ferns. Philipp. Jour. Sci. 8:139-145. pls. 2-4- 
1913. 
, On Phyllitis in ea be and the supposed genera Diplora and T riphlebia. 
Ibid. 8:147-155. a £°9 1013. 
— Papesh ion Ibid. 9:1-9. 1914. 
, New Sumatran ferns. Jbid. 9:227-233. 1914. 
™Ricc, G. B., Notes on the flora of some Alaskan sphagnum bogs. Plant 
World 17: PES, 1914 
