190 
MOSSES AND LIVERWORTS. 
matosa; perichaetialibus lanceolatis lineali-acuminatis serratis evanidicostatis ; capsula ovali 
subaequali inclinata collo distincto instructa ; pedicello cygneo crasslusculo ; operculo conico- 
rostrato”; calyptra cuculliformi; annulo composito ; perist. dentibus lineali-lanceolatis dense 
articulatis, ciliis e membrana lata plicata lanceolatis carina biantibus, ciliolis binis nodosis. 
Valleys of tbe 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 
tbe 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. 
Tbe description of Hypnum expansum Tayl. 1. c., p. 65, except in tbe less dendroid habit 
subpinnate ramification and gradually acuminated leaves, 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 Ilypnum 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. Whippleanum (sp. nov.): dioicum pusillum caespitans sordide virescens ; caule filifornfi 
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 ; perichsetialibus filiformi-acuminatis evanidi-costatis ; capsula abrupte 
horizontali, ovali oblongave, subinmquali, collo conspicuo instructa ; peristomii albidi dentibus 
lineali-lanceolatis crebre articulatis, ciliis carina solutis, ciliolis binatis, omnibus aequilongis ; 
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 IX.) 
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.) monoicum exiguum ; caule filiform! 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 
ar.eolatis ; perichaetialibus pellucidis striatis lanceolatis filiformi-acuminatis, costa excurreute; 
capsula cylindracea obliqua curvula exannulata ; perist. dentibus lineali-acuminatis, ciliis line- 
aribus foraminulosis, ciliolis singulis brcvissimis ; operculo conico obtuso ; calyptra permagna 
cuculliformi infra capsulam descendente ; pedicello cauligeno gracili longiuscnlo : 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 Europaea of Bruch and Schimper. Its distinctive 
characters consist in its small size, simply pinnate ramification, narrow elongated, inclined 
