Hypnum.] BKYACEiE. 381 



Var. gracilescens, Bruch & Schimp. Tufts soft, yellowisli ; 

 stems slender, erect, sparingly branching, pinnately raniulose, 

 the upper branchlets longer: leaves smallei*, open, falcate or 

 reflexed from the middle or undulate flexuous at the apex, 

 lanceolate-acuminate from an enlarged cordate base, costate to 

 above the middle ; basilar areolation loose, rectangular-hexagonal, 

 that of the apex long and flexuous-linear ; leaves of the branch- 

 lets narrower, lanceolate-acuminate, uncinate. — Bryol. Eur. 

 t. 604, fig. 3, 22, 23, and t. 605, (?. 



Var. tenue, Bruch & Schimp. Stem prostrate or ascending, 

 very slender, pinnately or irregularly raniulose : leaves small, 

 upon the stems open-secund and ovate-lanceolate, on the 

 branches very narrow and falcate or flexuous, the perichoetia 

 often aggregated ; like the last, but more slender and prostrate. 

 — Bryol. Eur. t. 605, d. 



Var. hamatuni. Plants very large and regularly pin- 

 nately raniulose ; branchlets spreading, rigid, incurved hamate 

 at the apex : young leaves yellowish green, shining, the old 

 brown or blackish, all solid, long-lanceolate, acuminate, auricu- 

 late at the excavated angles ; basal cells oval-rectangular, twice 

 longer than broad, those of the auricles quadrate, the middle 

 longer and narrowly hexagonal-rectangular, the apical very 

 narrow, long, linear-hexagonal, diai)hanous ; costa stout, solid, 

 rather broader than thick, reaching nearly to the apex, yellowish 

 brown : flowers and fruit unknown. — IL aduncimi, var. hamcv- 

 turn and var. gigmiteum, Bruch & Schimp. Bryol. Eur. t. 606. 

 H. hamifoUum^ Schimp. Syn. ed. 2, 732. 



Hab. Swampy ground, bogs and ditches; very variable and common, 

 but rarely fruiting. Var. gy-acilescens in limestone springs, Pennsyl- 

 vania; var. Kneiffii, with loose leaves (var. laxiun, Milde), near Closter, 

 New Jersey (Austin); and var. hamatum, in peat bogs and on the bor- 

 ders of lakes in Minnesota, and in swamps near Milwaukee, Wisconsin 

 (Lesqiierpiix). 



134. H. Sendtneri, Schimp. Dioecious: tufts deep and 

 wide, dirty red or bright green at the surface, fuscous or black 

 within ; plants long, simple, flexuous, j^innately raniulose ; 

 branchlets involute at the apex : leaves crowded, falcate-secund, 

 broadly ovate or oblong-lanceolate, acuminate, hooked, recurved 

 from the middle, very concave, somewhat glossy, slightly striate 

 when dry, and slightly decui-rent and excavate at the angles ; 

 basilar cells long-rectangular, narrower toward the borders. 



