240 The Botanical Gazette. [ June, 
This fine little moss cannot be confounded with any other 
North American or European species. It rather resembles 
some small tropical species of the genus Homalia and Porot- 
vichum, but is easily distinguished from these by the perfect 
peristome, with long cilia 
Amblystegium Aplzingort. Loose, green or yellowish 
green. Stems depressed, irregularly branching. Leaves 
very loose, distant, patulous, ovate-lanceolate, broadly and 
obtusely acuminate, quite entire; costa generally simple, thin, 
vanishing above the middle, sometimes forked and shorter. 
Areolation rather loose, cells oblong or linear, flexuous, with’ 
the primordial utricle distinct, the alar shorter, looser. Per- 
ichaetial bracts oblong-lanceolate, acuminate, very: entire, Cos- 
tate, more narrowly reticulate. Pedicel short, 6-8 long, 
reddish. Capsule inclined or subhorizontal, small, ovate, 
arcuate, much constricted below the mouth when dry, lip de- 
pressed, obtusely apiculate. 
Virginia: bank of Potomac. District of Columbia: Rock 
Creek. (¥. M. Holzinger, 1891-1892.) 
Allied to A. adnatum, but easily distinguished by the short- 
acuminate and obtuse leaves, the generally simple costa, the 
looser and less numerous alar cells, the shorter capsule an 
the more depressed lid. 
Hypnum giganteum Sch. var. Labradorense.—A notable 
variety, distinct from the type by the leaves larger and longer 
and the costa attenuate, vanishing rather far from the apex 
and often forking. 
Labrador: Battle Harbor (Rev. A. C. Waghorne, 1892). 
Vesoul and Stenay, France. 
EXPLANATION OF PLATES XXI anp XXII. jucida. 
All the oe ae oer are drawn by means of Nachet’ s sso oF leaves 6 
PLaTE X Die. (nl fr che mea a, entire plant; je: ¢, ca 
areolation ot the basal sortie “ d, do. in the middle; ¢, teeth of 
with the lid; phd — Aeopercu ee . port on of ibs "annulus; h, two of a 
the a —B. sidens yalein Z entire plant; ?, upper aginant 
tte tl 4 leaves; d, oe of a nad é, arcolation ee getter: sari “d, b, 
amina A blystegium flolzt a, entire plant; 4, capsule 
alar cells; d, areolation in the naiiie. é, &, Bees 2 of the apex; f 
operculate; g, the same Ponsa so portion of 
Prate XXII.—A, mnium Holzingeri. a, entire plant; ?, oy et 
a 
branch; ¢, c, lower a ricer ; upper stem leave rigs: aeolation on the 
pex ofa : ch ; a pract: 
peter in the middle; id, areolation of the apex; #, inner perichaetie im 
ule with cee aps ee tiie: of Sa Lamenggit | B. se d of 
erythrorrhizon ant: 4, -¢, alar cells: 4, % po 
Same; ¢, capsule Me senctenes of, tae a B pra frags 27> h. 
