MUSCI. (mosses.) 681 



To p. 628. 



3. Didymodon cyliiidricus, Br. & Sch. Dio3cious ; stems csespi- 

 tose, 4" -10" high, branched; leaves linear-acuminate, spreading, flexuous, 

 more or less undulate on the plane margins, costate to the apex ; capsule nar- 

 rowly cylindrical, annulate, its walls thin; pedicel slender, yellowish ; operculum 

 rostrate from a conic base ; teeth of the peristome remotely articulated. — Ches- 

 ter County, Pennsylvania, James. (Eu.) 



To p. 648. 

 10. MEiilim Sfmiuldsuui, Bryol. Europ. Hermaphrodite, crespitose , 

 stems l'-lj' high, radiculose; lower leaves minute, remote, reddish, obovate ; 

 upper leaves large, crowded, bright green, decurrent, broadly obovate and ob- 

 long-spatulate, shortly acuminate, with a thickened, doubly spinulose-dcntate 

 border ; capsule oval, rather pendulous ; operculum conic, shortly rostrate ; 

 pedicels aggregated. — White Mountains of New Hampshire, James. — Very 

 near M. spinosum, Bnjol. Europ., found in British America by Drummond, but 

 that has a dioecious inflorescence. (Eu.) 



To p. 655. 



Pildtriclmiu cymbifdlium, n. sp. Dioecious; main stems 2'-3' 

 long, rhizoma-like, creeping, filiform, sparingly radiculose, with distant minute 

 triangular-lanceolate leaves, scarcely visible to the naked eye ; primary branches 

 rather slender, erect, l'-U' long, simple or irregularly and pinnately ramu- 

 losc ; leaves pale green, closely imbricated in 5 distinct spiral rows, lanceolate, 

 acuminate, strongly cymbiform-concave, their upper half with the margins 

 serrulate, recurved or platter-edged, the point flat ; costa percurrent ; areolatiou 

 close, linear-fusiform, flexuose; the cellules at the basal angles minute-quadrate, 

 opaque; fertile flowers numerous, paraphysated. — "From a tree on a hum- 

 mock, E. Florida," ex herb. Gray. 



Metedrium t pendulum, n. sp. Dioecious (?) ; stems 7' -8' long, 

 divided, divisions with distant brandies, all filiform, pendulous and flexile; 

 leaves at the base of the branches broader and 2-ranked, elsewhere narrower and 

 erect-patent every way, all linear-lanceolate, tapering into a long and slender ser- 

 rulate point, costate beyond the middle, papillose on the back ; the areolatiou 

 close, linear, with a small disk of minute quadrate cellules in each of the basal 

 angles; capsule small, oblong-oval, on a short axillary pedicel (l"-2" long) ; 

 peristome double, the exterior 16 linear-lanceolate articulated teeth, more or less 

 fissile along the medial line ; the interior 16 perforated cilia, arising from a some- 

 what broad membrane ; operculum conic-rostellate ; spores large ; perichseth 

 small ; vaginula emergent ; calyptra not seen. — Western Louisiana, Teinturier, 

 i Prof. Riddell. — A pale-yellowish Moss, with thread-like stems and branches. 



To p. 661. 



Myurella Careyana, add : — Capsule oval, with a conspicuous col- 

 lum, inclined, amulate ; cilia of the inner peristome nodulose , operculum hem- 

 ispherical-conic, pedicels 3" -4" jigh. — Brattleborough, Vermont, Frost. 



Mypnum palUStre, L. (see p. 67!) has also been found, with the last, 

 by Mr. Frost. 



