272 BULLETIN OF THE UNIVERSITY OP WISCONSIN. 



99. Fissidens pauperculus Howe. Dioicous: minute, loosely gregari- 

 ous, flavescent: stems decumbent or ascending: leaves 3-5 pairs, increas- 

 ing in size upward, lowest minute, upper oblong to obliquely spatulate-ob- 

 long, acute or shortly acuminate, margin slightly serrulate crenulate; bor- 

 der none; costa stout, vanishing below apex; vaginant lamina ^ to % 

 length of leaf, unequal; inferior lamina ending at about middle of vaginant 

 lamina in upper leaves or reaching base in lower; cells of vertical lamina 

 mostly hexagonal, smaller and oval at margin, enlarged and oblong rect- 

 angular next to costa, those of vaginant lamina becoming longer and nar- 

 rower towards base: seta terminal, flexuous, pale yellow; capsule yellowish, 

 oval or oval-oblong, inclined or cernuous, slightly arcuate when dry; lid 

 conic-rostellate, about equaling capsule; peristome red, normal; annulus 

 pale, of 2-3 rows of deciduous cells. Erythea 2: 97. 1894. On moist banks 

 in company with F. limbatus Sulliv., Marathon county, Cal. 



100. Ceratodon conicus Hpe. Dioicous: tufts cespitose, dull yellow 

 green above, fuscous below: stems short, rather slender, dicbotomously 

 branched: leaves erect appressed, deep green, smooth, crowded at tip into 

 a small closed coma, straight wet or dry, rather broadly ovate lanceolate, 

 margin quite entire, revolute to apex, nerve thick, excurrent into a long 

 point; cells all small, regularly quadrate, basal larger and pellucid: peri- 

 chaetial leaves convolute-vaginant, obtusate with an excurrent nerve, laxly 

 areolate: capsule on a pale red seta, erect, ovate-elliptic, rather wide, fus- 

 cous, when dry and empty but little altered, sulcate in upper part, not 

 strumulose; lid purple, short conic; teeth pale, red at base, yellowish above, 

 erect with fewer articulations, scarcely bordered externally. Braithw. 

 Brit. Moss. Flora 1: 175. At the base of a stump, Spence's Bridge, B. C. 



101. Ceratodon heterophyllus Kindb. Agrees with C. purpureus, in 

 shape of capsule, stem leaves, not excurrent costa and revoluble annulus, 

 but capsule often more curved and distinctly strumose; agrees with C. 

 conicus in peristomial teeth having few articulations: differs from both in 

 blunt perichaetial leaves, and is also very peculiar in short concave sub- 

 oval leaves of long shoots. Ott. Nat. 5: 179. On earth: St. Paul Island, 

 Behring Sea. 



102. Trichodon flexifolius Ren. & Card. 1 Loosely cespitose, green: 

 stems erect, simple, short: lower leaves small, lanceolate subulate, upper 

 larger, patulous, very flexuous, from an oblong base gradually narrowed 

 into a long linear subulate canaliculate subtubulose point, sinuate at 

 margins, toothed at apex, and with a broad obscurely excurrent costa; 

 basal cells rectangular, elongated (1 : 2-4), others small, quadrate, very 

 chlorophyllose, with transverse walls slightly prominent: perichsetial leaves 

 similar, but dilated and sub-sheathing at base: male flowers on same plant, 



i The authors of this species are not certain as to its generic positior , but state that 

 by its vegetative system it is somewhat allied to T. cylindricus. 



