mjpnum.] BRYACE^. 409 



iii. 1., t. 225^ Ilylocomium hrevirostrum, Bruch & Schimp. 

 Bryol. Eur. t. 493. 



Hab. Summit of the Alleghany Mountains (Sullhant & Lesquereux), 

 fertile; deep ravines, Pennsylvania and New Jersey {James, Austin), 

 sterile. 



Subgenus XXVIII. HYLOCOMIUM. 



Plants long, two or three times divided, distantly and irregu- 

 larly pinnate-ram ulose, with innovations from the apex and 

 from the lateral branches. Leaves squarrose or spreading- 

 secund ; para])hyllia none. Capsule turgid-ovate or subglobose. 

 — Ilylocomium, SchimjD. 



189. .H. squarrosum, Linn. In wide soft bright green 

 tufts ; stems slender, Hexuous, distantly ramulose, the branchlets 

 unequal, acute, ilexuous : stem-leaves crowded, divaricately 

 squarrose from the erect concave base, broadly ovate, narrowly 

 lanceolate-acumhiate, with a short costa or none ; branch-leaves 

 smaller, less squarrose, the terminal spreading, distantly and 

 obscurely dentate, not sulcate ; areolation dilated, reddish brown 

 at base ; perichajtium squarrose, the inner leaves subulate- 

 acuminate, serrulate at apex: capsule abru]>tly horizontal, 

 turgid-ovate or subglobose, reddish-brown, inclined when dry ; 

 pedicel twisted to the right; operculum convex-conical, a])icu- 

 late ; segments split between the articulations ; cilia three ; annulus 

 double. — Sj)ec. PI. 1127. Ilylocomium squarrosum, Bruch & 

 Schhnp. Bryol. Eur. t. 492. 



Hab. Grassy places and borders of woods; Alleghany Mountains near 

 Summit Portage, Pennsylvania (Lesquereux] \ Oregon [E. Hall); rare, 

 and found only sterile. 



190. H. triquetrum, Linn. Tufts high and wide, rigid, 

 yellowish or light green ; stems woody, reddish, long, robust, 

 erect, nearly simple or fastigiately branching, pinnately ramu- 

 lose ; branchlets unequal, short and rigid, or longer and flagelli- 

 form, sometimes radiculose at the apex : stem-leaves close, 

 subsquarrose, rarely secund, deltoid-obcordate and decurrent at 

 base, lanceolate above, sulcate, narrowly bicostate to the middle, 

 serrate at the apex, scarious, loosely areolate at base ; leaves of 

 the branchlets narrower and gradually smaller upward ; peri- 

 chaetium squarrose : capsule horizontal by a curve of the pedicel 

 under its base or inclined, oblong, narrowed at the orifice when 



