338 BULLETIN OF THE UNIV'ERSITY OF WISCONSIN, 



delicate; branches numerous, short: tufts depressed, very dense, dark or 

 reddish green: leaves erect-spreading when moist, imbricate when dry, 

 broadly oval lanceolate, acuminate, entire; costa delicate, often unequally 

 bifid, vanishing toward middle; margin of 3-5 rows of rounded trans- 

 versely elongated cells in lower part, the remainder oblong; inner perichae- 

 tial leaves sheathing, lanceolate, abruptly narrowed into a narrow point, 

 longitudinally plicate: dioicous: capsule erect, cylindric, ferruginous; 

 operculum convex-conic, rostrate; teeth of peristome, short, yellow; endos- 

 tome with narrow segments, a little shorter than teeth, constricted at 

 articulations giving them a moniliform aspect, basilar membrane and cilia 

 absent. Husnot, Muse. Gall. 302. — Greenland. 



436. Pseudoleske.i malacoclada C. M. & Kindb. — Plants densely 

 tufted: stems not rigid, much branching, sparingly radicant, without para- 

 phyllia: branches green or finally fuscescent: leaves crowded, entire, not 

 decurrent, not distinctly papillose; stem leaves from a concave broadly 

 ovate or rotundate base suddenly narrowed to subulate or filiform recurved 

 acumen; branch leaves more attenuate to subulate and patent point; basal 

 margins recurved; cells rotundate, alar quadrate; costa very short and 

 double or none; perichaitial leaves loosely connivent with a patent or curved 

 acumen: dioicous. Mac. Cat. 182. — On dry rocks: British Columbia. 



437. Ileterocladium heteroptermn Sch.— Stems 2-6 cm. high, filiform, 

 decumbent, delicate, giving off irregular ascending branches: tufts dark- 

 green: leaves spreading or sub-secund when moist, loosely imbricate when 

 dry, papillose on both sides; stem leaves oval, acuminate, denticulate all 

 around; costa faint, bifurcate, short; cells rounded-quadrate, oblong- 

 linear in the middle; branch leaves smaller: capsule horizontal, oblong, 

 neck distinct; lid conic, rostrate: rarely fruiting. — Husnot, Muse. Gall. 307. 

 On damp rocks: British Columbia; Vancouver Island; Greenland. 



438. Heterocladiuiu Vancouveriense Kindb.— Plants minute, densely 

 and irregularly pinnate, sparingly radiculose, rarely flagelliferous, dark 

 green, not glossy; branches short, very slender: leaves ovate-deltoid, den- 

 ticulate above middle, pellucid, faintly papillose; stem leaves decurrent, 

 reflexed at base, acute; branch-leaves smaller, looser, more concave, oval 

 and obtuse; cells hexagonal oval or rhombic, alar and marginal quadrate- 

 rhombic; alar and marginal quadrate-rhombic; costa slender, short, 

 scarcely reaching to middle; paraphyllia few or none; perichsetial leaves 

 longer acuminate, cells narrower: capsule small, oblong, sub-erect; per- 

 istome perfect, teeth yellowish, cilia 2, elongate: dioicous. Mac. Cat. 183. 



On rocks: Vancouver Island. 



43J). Heterocladiuin fruUaniopsis C. M. & Kindb.— Stem irregularly 

 divided, brown red, not radiculose; branches short, obtuse, when dry in- 

 curved: paraphyllia none; leaves uniform, dark-green, not shining, when 

 dry loosely or not at all appressed, sub-squarrose when moist, distant and 



