rangio fere a medio ad basin in pedicello anguste cylindrico con- 
stricto ; calyptra angusta parce pilosa vel fere nuda striato-plicata ; 
flore masc. majusculo gemmiformi tumido polyphyllo, antheridiis 
breviter stipitatis, paraphysibus paucissimis. 
Rocks, Colorado, Mrs. Mary P. Haines. 
Readily distinguished by the lower half of the sporangium being 
constricted into a narrow cylindrical pedicel. On account of the 
leaves being scarcely changed in drying it has much the appearance 
of O. pulchellum ; which also has a similar but rather shorter and 
more tumid pedicel to the sporangium.—The forms of O. speciosum 
have more hygroscopic leaves, but somewhat similar in shape and 
texture, capsule less exserted, a different sporangium, peristomal © 
teeth reflexed when dry, ciliz 16. &c.—O. /evigatum is said to be de- 
void of cilia, &c.—O. Sullivanti grows on trees, has peristome re- 
flexed when dry, leaves of a different texture, &c. 
Orthotrichum Macouni. x. s¢.—Autoicum, robustum, late dense 
ceespitosum ; cespite lutescente inferne fusco, caule subunciali parce | 
diviso, foliis siccitate erectis humiditate strictiusculis subapertis ovato- 
lanceolatis acutissimis subcarinatis minute papillosis apice integer- — 
rimis margine revolutis, costa subcontinua, reti perminuto obscure | 
granuloso basilari paulo latiore vix pellucidiore ; capsula augustissime _ 
cylindracea levi pallido-straminea in pedicello siccitate valde sulcato 
longe defluente longe exserta, peristomii dentibus 16 brevibus sub- — 
ulatis Siccitate erecto-incurvis pallidis hyalinis distincte 8—10-artic- 
alatis minute granuloso-papillosis. Ciliis 8 dimidio brevioribus an-— 
gustis, operculo longe apiculato, calyptra parce pilosa. 
Rocks, Cascades, British Columbia, 1875, Macoun. 
Closely related to O. Kingianum, SULuiv. ; but compared with a | 
specimen from James ex Herb. Lesgx. it differs as follows :—More ~ 
robust; leaves less erect, longer, -less densely papillose, with the 
upper cells larger and less granulose, the lower ones much less en- 
larged and in the older leaves not at all pellucid ; capsule paler, nar- 
rower, exactly cylindrical when moist (not obovate-cylindrical), &c. 
—Compared with the description and figures in Jcones Suppl. p. 74, — 
t. 55, the leaves are much more acute and of a more uniform text- 
ure throughout, costa extending nearer to the apex; capsule not 
obovate when moist (cylindrical), the mouth not at all ampliated — 
when dry, the teeth not punctulate but granulose, not brown but — 
straw-colored. 
Orthotrichum Rauei, 7. s6—0O. specioso var. polycarpo (O. leto- 
carpum, HEDW.) peraffine; differt tamen statura minore, capsula 
magis exserta, peristomil dentibus erectis vel subpatentibus pellucidis — 
distincte articulatis magis divisis, ciliis octonis ( semper ?) quam den- 
tibus longioribus. 
Colorado, Brandegee (Rav). 
Male flower gemmiform, axillary. Capsule more or less distinctly — 
8 striate at both the base and apex when dry, more exserted than in — 
any form of O. speciosum, the teeth closely and distinctly articulated. 
