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Art. LII—A Description of some new Species of Gymnostomum.
[Read before the Wellington Philosophical Society, 29th August, 1874.]
1. Gymnostomum patulum, n. s.
Caulis brevis. Folia sicca crispata anguste lanceolato-linearia Basi vix latiora margine subaicem erecta, nervo virido in acumen producto e cellulis minutis rotundatis ohlorophyllo repletis basi parallelogrammis laxioribus areolata; perichætiala longiora erecta linealia. Theca inpedunculo brevi ellptica, orificio membrana clauso, operculo oblique subuli-rostro.
Stems short. Leaves crisped lanceolato-linear scarcely wider at the base, the margin erect under the apex, nerve green excurrent, point aristate, areolæ formed of minute rounded cells filled with chlorophyl, towards the base more lax and four-sided, the perichœtial leaves longer, erect. Fruit-stalk no longer than the perichætial leaves. Capsule elliptic, the mouth closed by a membrane, operculum oblique with an awl-shaped beak.
2. Gymnostomum knightii, n. s. Schimp. in litt.
Caulis perbrevis. Folia linguœformia carinata, margine e basi ad apicem recurva, ubique e cellulis minutis pellucidis rotundatis areolata, nervo crasso infra apicem evanido. Theca in pedunculo medio erecta oblonga sicca cylin-drica, operculo rostrato, et thecæ orificium membranâ non clausum.
Stem very short. Leaves tongue-shaped, keeled, margins recurved from base to apex. Areolæ minute, round, pellucid, nerve stout, vanishing below the apex. Capsule oblong, erect, mouth not closed by a membrane. Operculum beaked.
3. Gymnostomum calcareum var. intermedium.
Plantæ densissime cœspitosœ gracillimœ, inferne ferrugineæ. Folia minuta erecta crispula lanceolato-linearis mutica obtusa concta, abrupte evanidinervia, margine minute crenulata et circum apice erecta, e cellulis basi rectangular-ibus pellucidis superne rotundatis parvis papillosis areolata. Theca ovali-cylindrica; ore e cellulis transverse angustatis pluriseriatis formato.
Stems densely cæspitose, slender, ferruginous below. Leaves minute, erect, crisped when dry, linear-lanceolate, concave, obtuse, with a mucro. Margin minutely crenulate, erect round the blunt apex; nerve ceasing below the apex. Capsule cylindrical when dry, the mouth formed by several series of narrow cells.
This moss differs greatly from Seligera calcarea, Br. et Sch., to which Hooker refers it. The latter has a yellow-red coloured peristome with broad flat teeth, stout bars, without a median line.
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Explanations of Plate XXVIII.
| 1. |
Gymnostomum patulum. |
Plant nat. size, and capsule enlarged.
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a, b. Leaves enlarged.
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c, d, e. Portion of leaves greatly enlarged.
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2. Gymnostomum knightii.
Capsule enlarged.
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a, b. Leaves enlarged.
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c, d. Portion of leaves greatly enlarged.
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3. Gymnostom calcareum var. intermedium.
Capsule enlarged.
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a, b. Leaves enlarged.
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c. Portion of leaf greatly enlarged.
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4.Gymnostomum sulcatum.
Plant enlarged.
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a. Operculum and calyptra enlarged.
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b, c, d. Leaves enlarged.
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e. Portion of leaf greatly enlarged.
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5.Gymnostomum areolatum.
Plant enlarged.
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a. Leaf enlarged.
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b. Portion of leaf greatly enlarged.
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6.Gymnostomum angustatum.
Capsule enlarged.
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a, b. Leaves enlarged.
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c. Portion of leaf greatly enlarged.
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4. Gymnostomum sulcatum, n. s.
Dense cæspitosum erectum gracillimum innovando-ramosum, foliva dense conferta minutissime papillosa carinata crispula madefacta patentiaerecta lanceolata apiculata evanidinervia, margine plana v. parum recurva, e cellulis parvis incrassatis areolata. Theca ovalis in pedunculo brevi erecta sulcato-striata, operculo conico suboblique-rostrato.
Crowded, erect, very slender, branched. Leaves crowded, minutely papillose, keeled, crisped (when moistened patentia-erect), lanceolate, apiculate, nerve vanishing, margin flat or slightly recurved. Areolæ small. Capsule oval, erect, striate, on a short fruit-stalk. Operculum conical with an oblique awl-shaped beak.
5. Gymnostomum areolatum, n. s.
Gregarium brevissimum, folia concava laxiuscula crispula madefacta erecto-patentia elongato-oblonga v. subspatulata apiculata v. acuminata, ubique e cellulis amplis pellucidis tenuissime papillosis superne rotundato-angulatis v. quadratis areolata, nervo ad apicem fere extimum perdurante. Theca ovata in pedunculo brevi erecta, operculo conico suboblique rostrato.
Plants crowded, stem very short. Leaves concave, lax, crisp, when moistened erecto-patent, elongato-oblong or subspatulate, apiculate or acuminate; areolæ throughout large, pellucid, papillose, towards the point rotundato-angular, nerve extending to the apex. Theca ovate, erect, on a short fruit-stalk, operculum conical with an oblique beak.
6. Gymnostomum angustatum, n. s.
Plantæ humiles. Folia madefacta patentia curva papillosa linealia obtusa, margine erecta, nervo dorso prominente infra apice evanido. Theca erecta ovalis; operculum e basi conica in rostrum subulatum continuatum.
Plants smaill. Leaves (when moistened, spreading, curved), papillose, linear, obtuse, margin erect, nerve prominent at the back, vanishing below the apex. Theca erect, oval, operculum with an awl-shaped beak continued from the conical base.