68 
have compared them with specimens of U. curvifolia, collected by 
Breidler, in the Austrian Alps, and with Limpricht’s description 
in his Laubmoose, and U. scaérida differs in having a longer, more 
slender beak to the lid, and the cilia are of two rows of cells, not 
one as described by Limpricht. Why the comparison with U. — 
crispa was made at all I do not understand, seeing the species — 
grew on rocks, and the leaves are not circinnate, unless Macoun 
has distributed a totally different set of specimens from the ones — 
that were seen by Kindberg. The following measurements and 
description may enable some other students to determine whether _ 
their specimens are the same as in our set. 
Leaves “ comparatively short as in U. curvifolia” (1.5-2.5 
mm), ‘‘basal cells elongate, alar” (inflated), (5—7 rows of) “ marg- 
inal distinct and hyaline. Capsule sub-oblong” (less than 1 mm. — 
long) “ passing into a long collum” (constricted at neck when dry) 
“teeth not reflexed, pale” (bigeminate, striolate, perforate, cilia 8, 
as long as the teeth, of two rows of cells, mouth bordered above — 
the insertion of the peristome, bands of the capsule of four rows — 
of large cells), “ calyptra lobate, very hairy” (hairs papillose) 
“pedicel long” (2 mm.,’exserted), The parts of the description 
in brackets are mine. Now Drummond’s 153 shows no lid, but im 
_all else they agree with U. scabrida. Macoun collected the speci 
mens in the Rocky Mountains near Hector. 
It may be that Kindberg in describing U. scabrida as a neW © 
species different from U. Americana Mitt., as it was originally dis- 
tributed, thought that the latter species was related to U. crisp, — 
as the Manual says, but even then I do not understand his com- 
parison. 
Welssta AMERICANA (Beauv.) Lindb. 
Orthotrichum Americanum Beauv. Prodr. 81 (1805). | 
Orthotrichum Hutchinsie J. E. Smith, Eng. Bot. ¢. 2523 (1813) 
Orthotrichum strictum Brid. Bryol. Univ. 1: 289 (1826). 
Ulota Hutchinsie Hammar, Mon. Orth. Suec. 27 (1852). 
Weissta Americana Lindb. Musc. Scand. 28 (1879). 
Ulota Americana Limpricht; Rab. Kryptfl. 4: Part 2, 21 (1 
not Mitten. : ; 
Through the kindness of M. Autran, of the Boissier Herbariu™, 
I have seen the specimens from which Schwegrichen figured 
Orthotrichum Americanum, Beauv., in the Supplement table 1 
(1824), and find mounted on the same sheet portions of the ty 
890) 
