TWENTY-SEVENTH ANNUAL MEETING. 169 



and small sclerenchymose cells (stereides); it is then heterogeneous. The large 

 parenchymoee cells (called guides)' form a row (seldom double) in the middle of 

 the costa, touching each other tangentially. They are comparatively large, but 

 little thickened, and either empty or starch-bearing." '■' 

 Dioecious; stems radiculous (often densely); costa with guides; 

 capsule more or less arcuate. 

 Leaf -cells pitted; costa percurrent; leaves not undulate: guides 

 in one row. 



Perichaetial leaves abruptly subulate x D. scoparium Hedw. 17 



In Labette (Nelson); Saline ( Henry); sterile form, with leaves often broken 

 at point. 



CAMPYLOPUS, p. 77. 



Costa smooth at back, auricles none. 



Upper leaves with hyaline points x C. henrici Ren. & Card.^ 



C. henrici. Saline Co. (Henry); sterile. 



FISSIDENS, p. 81. 



I. (Eafissidens.) Plants terrestrial or submersed, but not floating; leaves soft, 

 of one layer of cells. 



A. Fruit terminal. 



1. Monoecious, male flowers axillary. 



Leaf-cells larger, not densely chlorophyllose, nor in distinct rows, 



X F. bryoides Hedw. 2 



2. Dioecious or monoecious, with male flowers terminal on a rooting branch 



at the base of the female stem. 

 Leaf-cells almost or quite isodiametric, often obscure; leaves 



with a narrow border, at least on vaginate lamina. 



Margins of leaf-cells not papillose x F. brambergeri Schw. 



Serrulate at apex: auricles broadly margined 



X F. incurvus Schw. 3, var. minutulus Sulliv. 

 Short acuminate, lid rostellate. . x F. incurvus Schw., var. exiguus Sulliv. 

 Leaves without a border. 



Obtuse, cells pellucid, operculum conic * F. obtusifolius Wils. 17 



Broader border of elongated cells on margin of vaginate 

 lamina; and a narrow, more or less distinct 

 border gn the dorsal wing, 



x F. obtusifolius, var. Kansensis Ren. & Card. 

 Apiculate, operculum with acicular beak x F. osmundoides Hedw. 18 



B. Fruit lateral. 



Leaves bordered by several rows of paler, often incrassate cells. 

 Capsule erect or inclined, flowers dioecious, leaf-cells obscure, 



X F. decipiens DeNot. 19 

 X F. bryoides. Saline (Henry). F. incurvus, var. minu- 

 tulus (Smyth's Check List), x F. incurvus, var. 

 exiguus (Smyth's Check List), x F. obtusifol- 

 ius, var. Kansensis, Saline ( Henry). F. osmun- 

 doides. Brown Co. (Becker). F. decifjiens 

 ( Smyth's Check List). 



> Pringsh. .Jahrb. f. Wiss. Bot., VI, 374. 



'Cf. Limpricht: Die Laubmoose, p. 23. 



= Eenauld & Cardot : Bot. Gaz., XIII (1888), p. 197, pi. XIV. 



