330 BULLETIN OP THE UNIVERSITY OF WISCONSIN. 



rounded at base; lid short conic; peristome orange red, teeth narrowly 

 linear, often cohering in pairs, strongly papillose, lamellae 15-20, entire 

 along middle line; cross bars imperfect, strongly muricate. Monog. des 

 Fontin., 1. c., 105. On submerged trunks of trees and granitic rocks: 

 Lake Pend d' Oreille, Idaho. 



892. Fontinalis Duriaei Sch. Plants soft, lax, pale olive or yellowish 

 green, often blackish at base: stems delicate, more or less flexuose, entire, 

 foliate or naked below; branches distant, but quite numerous, unequal, 

 short or elongated, spreading or erect, attenuate, tapering or cuspidate: 

 leaves more or less scattered, spreading or erect-spreading, imbricate at 

 extremity of branches, soft or slightly rigid, slightly concave, often almost 

 plane, sometimes a little plicate longitudinally; stem leaves broad, oval- 

 lanceolate, or oval-oblong; branch leaves oblong lanceolate, acute, sub- 

 acute or sub-obtuse, slightly denticulate at the summit; cells of angles short, 

 sub-hexagonal or sub-rotundate, brown or yellow; others elongated, nar- 

 row, attenuate, linear-rhombic, walls delicate and soft, sinuous, upper cells 

 much shorter; upper perichaetial leaves oval sub-orbicular, rounded at apex, 

 short and obtusely apiculate, finally lacerate: capsule immersed, oval or 

 short oblong, rounded at base, not contracted below mouth when dry; lid 

 conic: peristome beautiful purple or orange-red, teeth linear, sometimes 

 sinuous on margin, papillose, frequently cohering in pairs, entire or per- 

 forate along middle line; cross bars of endostome perfect. Monog. des 

 Fontin., 1. c.. 111. California. 



393. Fontinalis flaccida Ren. & Card. Plants very soft, yellowish: 

 stems slender, naked below; branches subpinnately ramulose; branchlets 

 spreading, slender, distant: leaves soft, distant, open, but convolute-imbri- 

 cate at top of branches, elongated, narrowly lanceolate, plane or nearly so, 

 obtuse or truncate, slightly denticulate at apex; cells thin-walled, median 

 very long, upper much shorter; those of angles large, lax, sub-rectangular, 

 or sub-hexagonal, hyaline or brownish, forming very distinct auricles; peri- 

 chaetial leaves broadly oval, truncate and finally lacerate at summit: cap- 

 sule immersed, sub-cylindric, rounded at base, not contracted below mouth 

 when dry; lid conic, elevated; peristome purple, teeth often cohering in 

 pah's, narrowly linear-acuminate, weakly papillose, entire along middle 

 line; cross bars of endostome imperfect, muricate. Bot. Gaz. 13: 201. 

 1888. Growing in stagnant or running water: Louisiana; Alabama; White 

 Mountains. 



394. Fontinalis microdonta Ren. Plants very slender and delicate,, 

 soft, entirely yellow or dark green at the base: stems delicate, filiform, red- 

 dish, naked at base, irregularly pinnate, branches distant, erect or erect- 

 spreading, attenuate or cuspidate: leaves scattered, erect-spreading, soft, 

 narrowly linear lanceolate, very long acuminate, acute, slightly denticu- 

 late, sinuate or entire at summit; stem leaves almost plane, branch leaves- 



