—13— 



NEW OR UNRECORDED HOSSES OF NORTH AMERICA * 



By J. Cardot and I. Theriot. 

 Condensed from Bot. Gaz, 30, July, 1900. 

 Ftssidens BRYOiDES Hedw. , var. gymnandrus Ruthe. Hedwigia 9 :i78, 1870. 

 Limpr. Laubm. i :43o. (F. gymnandrus Buse Muse, neerl. exsicc. fasc. 4, 

 No. 77). Northwestern Montana: in the vicinity of Lake MacDonald, Flat- 

 head Co. (J. M. Holzinger and J. B. Blake, 1898). 



A peculiar form distinguished from the type by the antheridia naked in 

 the axils of the stem leaves. 



FissiDENs suBBAsiLARis Hcdw., var. BusHii Card. & Ther. 



Differs from the typical form by broader, shorter, obtusely rounded 

 leaves ; costa extending nearly to the apex ; more opaque areolation and 

 thicker cell walls. 



Missouri : Eagle Rock, on gravelly ground (C. F. Bush, 1897). 

 Grimmia pseudo-Montana Card. & Ther. 



Dioicous, dark green, in rather thick cushions. Stems erect, forking, 

 about I mm. high. Leaves erect when either dry or moist, subimbricate, 

 i.75-3mm. long, o. 75-imm. broad, ovate-lanceolate, margins plain, entire, 

 lower leaves muticous; upper with a rather short finely denticulate hair-point, 

 slightly decurrent at the base ; costa rather strong, o.o6-o.o8mm. broad at the 

 base, channeled above, indistinct toward the apex ; lower cells next to the costa 

 linear, yellowish, toward the margin quadrate or short-rectangular, hyaline : 

 the others small, obscure, quadrate or subrotund, bistratose. Perichaetial 

 leaves similar, areolation laxer at base. Capsule exserted, erect, i.5-2mm. 

 long, short-oblong, subcylindrical when dry, on a rather thick straight seta ; 

 annulus none ; operculum convex-rostrate. Teeth of the peristome bright red, 

 about 0.35mm. high, entire or slightly perforated, subulate from a broad tri- 

 angular base, minutely granulose above, articulations 16-25. 



Idaho: near Moscow, on dry rocks (L. F. Henderson, 1894). Closely 

 allied to G. Montana B. & S., but sufficiently distinct by the larger leaves, 

 with a stouter nerve and a shorter and thicker hair, and chiefly by the per- 

 istomial teeth almost entire, not divided and scarcely perforate, with more 

 numerous articulations. 



Grimmia Montana B. & S. var. Idahensis Ren. & Card. 



• Differs from the typical form in the larger more exserted capsule on a 

 little longer seta, which is fiexuous and subgeniculate when dry. Leaves 

 often wanting the hair point. 



Hymenostomum microstomum R. Brown, Trans. Linn. Soc. 12:572 {Gyvinos- 

 toinum microstomum Hedw., Muse, frond. 3:71, pi. 30 B). 

 According to Lesquereux and James, Manual 56, this species is not 

 known from North America, and all the specimens that have been communi- 

 cated under the generic na.me Hyj7ienosto7nu7n SiTQ. to be referred to the Weisia 

 viridula var. gymnostomoides D. Muell. Yet the No. 54 of Sullivant and 

 Lesquereux Musci. Bor. Am. belongs undoubtedly to the Hymenostomum 

 microsto7num R. Br., at least in our set. 

 * [Translated by Miss Warner.'] 



