36 
Wisconsin Academy of Sciences, Arts and Letters. 
In the Revision of N. A. species of Fissidens, 1 FF. inconstans, exiguus 
and minutulus were reduced to F. incurvus, the two latter forming varie¬ 
ties. FF. bryoides var. csespitans, crassipes, Hallii and Texanus are rel¬ 
egated to the list of doubtful species. 
Two species have recently been named by Renauld and Cardot 2 as oc¬ 
curring in the U. S., FF. Bambergeri Schimp. and viridulus Wahl. The 
first of these I regard as a form of F. incur vus; the second is possibly a 
sub-species of the same. It may be known by its thin-walled capsule, with 
the peristome inserted below the mouth. Neither are worthy of a distinct 
place in the key. 
LEUCOBRYUM, p. 90. 
Capsule apparently lateral (by innovations), leaves erect- 
spreading, oblong lanceolate.L. vulgare, 3 l c 
Capsule exactly terminal, leaves squarrose, very short and 
very broad . .L. sediforme, 2. 
CERATODON, p. 92. 
Stems 2-8 (sterile often 10) cm. long, teeth articulate for f 
length.C. purpureus, 1. 
Stems 5 mm. long, teeth articulate to middle . . . C. minor, 2. 
TRICHODON, p. 92. 
Cells of leaf base linear, above rectangular . . . T. cylindricus, 1. 
Cells of leaf base rectangular (1:2-4), above quadrate . T. flexifolius. 4 
DISTICHITJM, p. 93. 
Capsule erect, spores 17-20 ji .1). capillaceum, 1. 
Capsule cernuous, spores 80-44 ju . inclination, 2. 
SELIG-ERIA, p. 96. 
Seta straight when moist. 
Leaves sharp pointed, cells above rectangular, spores 
10-14 ju . 
Leaves blunt-pointed, cells above quadratic, spores 
14-18 jl . 
1 See Bai’nes: Bot. Gaz. xii ("1887) 1. 
2 Bot. Gaz. xiv (1889), 99. 
3 L. minus cannot be separated. L. vulgare varies from 3 to 20 cm. in height and good 
fruit can be found in the same tuft from December to August. 
* Renauld & Cardot: Bot. Gaz , xiv, (1889) 94, pi. XIII. 
8. pusilla, 1. 
S. calearea, 2. 
