Contributions to the bryology and hepaticology of North America / by William S. Sullivant.

  • Sullivant, William Starling, 1803-1873.
Date:
1846
Catalogue details

Licence: Public Domain Mark

Credit: Contributions to the bryology and hepaticology of North America / by William S. Sullivant. Source: Wellcome Collection.

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    Hab. Oregon, between Puget Sound and Columbia River. (United States Explor- ing Expedition.) This species resembles, in many respects, H. crispifolium, from the same locality, as described and figured by Hooker and Schwsegrichen. But the opaque subpapillose leaves of the latter species, with a minute subrotund areolation, is a mark abundantly distinctive. H. Oreganum is very nearly related to H. praelongum, from which it differs by its larger size, its more rigid and densely pinnated stems and branches, not com- pressed, its more striated longer-acuminated leaves, and by the want of a nerve in the perichaetial leaves, &c. 7. Hypnum Oakesii, Sulliv. (Gray’s Manual of Bot. p. 673) : dioicum ; caule pros- trato pinnatim ramoso, ramis flexuosis compressiusculis; foliis lanceolatis acumi- natis evanidi-costatis spinuloso-dentatis ; capsula ovata gibboso-insequali longi- pedunculata, operculo conico-rostellato. Hab. On decayed prostrate logs, at the base of the White Mountains, New Eng- land, detected by the late Wm. Oakes, Esq. Descr. Planta decumbens, flexilis, viridi-lutescens, nitens, stratum laxe implexum efficiens. Caulis tri-quadriuncialis, tomento radiculoso pluries dichotomo-furcato obsitus, irregulariter pinnatim ramosus, ramis dissitis patentissimis subcomplanatis elongatis flexu- osis attenuatis. Folia costa circa medium evanida instructa, minute lineari-areolata, phis minus plicato-striata parcius rugulosa, margine reflexa; caulina concava, lato-ovata, brevius acuminata, patentia vel subsquarrosa; ramea ovalia, longe acuminata, patenti-erecta, api- cem versus spinuloso- etiam lacinuloso-dentata. Perichaetialia numerosa imbricatim con- ferta, exteriora reflexo-squarrosa, interiora convoluta erecta capillari-attenuata, omnia den- ticulata subecostata. Pedunculus e vaginula elongato-cylindrica tenuis, biuncialis et ultra, apice valde arcuatus, in sicco superne sinistrorsum inferne dextrorsum tortilis. Capsula ovata, gibboso-inaequalis, ventricosa, valde pachyderma, deorsum spectans. Peristomii ex- terioris dentes lineari-lanceolati dense articulati, interioris cilia lanceolata carinata, ciliolis binis inteijectis. Annulus exilissimus vix ullus. Operculum conicum brevi-rostellatum. — Flos masculus in planta distincta gemmiformis, axillaris, 8-10 phyllus; perigonialia ovata concava ecostata ; antheridia 10-12 longius stipitata, paraphysibus immixtis. Compared with H. brevirostre, Ehrh., its nearest congener, H. Oakesii has a subpin- nate (not subfasciculate) ramification ; the branches straight (not incurved) ; leaves erec- to-patent (not squarrose), oval, long-acuminate (not broadly cordate-triangular acuminate, not constricted at upper end of the lamina, nor convolute at the basal angles), strongly and