190 MOSSES AND LIVERWORTS. 
matosa; perichetialibus lanceolatis lineali-acuminatis serratis evanidicostatis ; capsula ovali 
subæquali inclinata collo distincto instructa ; pedicello cygneo crassiuseulo ` operculo conico- 
rostrato; calyptra cuculliformi; annulo composito; perist. dentibus lineali-lanceolatis dense 
articulatis, ciliis e membrana lata plicata lanceolatis carina hiantibus, ciliolis binis nodosis. 
Valleys of the coast range of mountains north of and near to the bay of San Francisco. Plant 
1-1} inches high, growing in close mats. Stems rather stiff and elastic, with shining bright 
green leaves, striate when dry. Pedicils aggregated, and arising mostly from near the base of 
the larger branches. (Plate VIII.) 
This species appears to be near Leskea gymnopoda, as proposed by Taylor in London Journal 
of Botany, 1846, p. 65, but that species is there described as having attenuated branches, ovate- 
lanceolate, semi-costate leaves, and a Leskeoid peristome. 
The description of Hypnum expansum Tayl. 1. c., p. 65, except in the less dendroid habit 
subpinnate ramification and gradually acuminated duin: applies very well to our species ; 
both, however, of the Taylorean species just named are considered by Mr. Wilson, (than whom 
there is no higher authority,) with authentic specimens before him, one and the same, and 
identical with Neckera longirostris, Hook., of which we have authentic specimens, clearly show- 
ing it to be quite distinct from Hypnum Bigelovii. 
Our species is interesting as being the most northern representative of a group of Thamnoid 
Hypna that appears to abound on the Quitinian Andes. 
H. WmniPPLEANUM (sp. nov.): dioicum pusillum ceespitans sordide virescens; caule filiformi 
bis terve diviso, divisionibus arcuato-prostratis pinnatis flagelliformi-attenuatis apice radiculosis ; 
foliis erecto-patentibus caulinis deltoideo-ramulinis ovato-lanceolatis acuminatis minute quad- 
rate oblonge areolatis opacis dorso papillosis toto ambitu dentato-serratis, costa pellucida fere 
ad apicem attingente; pericheetialibus filiformi-acuminatis evanidi-costatis ; capsula abrupte 
horizontali, ovali oblongave, subinsequali, collo conspicuo instructa ; peristomii albidi dentibus 
lineali-lanceolatis crebre articulatis, ciliis carina solutis, ciliolis binatis, omnibus squilongis ; 
operculo conico in medio constricto; pedicello tuberculato cauligeno. Habitat same as the 
last. A small species with thread-like stems 1-2 inches long; branches of the same thickness 
as the stems, 3-5 lines long, numerous and pinnately disposed.  Pedicels 5-7 lines in height, 
cygneus. Perichaetia rooting at the base. Capsule dark chestnut brown, pachydermous ; its 
junction with the pedicel being nearly at right angles: collum blackish, obtuse at base. Male 
flowers numerous on the main divisions of the stem, slightly stipitate; perigonial leaves broad- 
ovate long-acuminate ecostate ; antheridia 10—15 copiously paraphysated.—(Plate LX.) 
Hypnum crispifolium and Leskea laxifolia of Hooker, found on the northwest coast of this 
continent by Menzies, appear to be nearly related to this species ; but from the description and 
figures of them, given by Hooker and Schwaegrichen, they are both larger plants than H. 
Wippleanum, particularly the first, which has subfalcate-secund, flexuous leaves much longer 
acuminated, and when dry crisped: the second has an ovate-globose capsule, a Leskeoid peri- 
stome, and leaves of a different areolation. 
H. CALYPTRATUM, (sp. nov.) monoieum exiguum ; caule filiformi repente subsimplici pinnato 
apice flagelliformi foliis erecto-patentibus late ovatis longe tenuiter acuminatis denticulatis inferne 
margine recurvis continuo-costatis dorso parce papillosis e cellulis minutis subquadratis dense 
areolatis ; pericheetialibus pellucidis striatis lanceolatis filiformi-acuminatis, costa excurrente ; 
capsula cylindracea obliqua curvula exannulata ; perist. dentibus lineali-acuminatis, ciliis line- 
aribus foraminulosis, ciliolis singulis brevissimis ; operculo conico obtuso ; calyptra permagna 
cuculliformi infra capsulam descendente ; pedicello cauligeno gracili longiusculo: flore masculo 
globoso gemmiformi, perigonialibus orbiculari-ovatis apice tenui recurvo, antheridiis eparaphy- 
satis. Near Los Angeles, on the ground. A very small species belonging to a group consti- 
tuting the genus Thuiduim of the Bryologia Europea of Bruch and Schimper. Its distinctive . 
characters consist in its small size, simply pinnate ramification, narrow elongated, inclined 
