a h C X X r i DAWSONIA POLYTRICHOIDES.
Gen. Ghar. Perist. penicillatuin, ciliis numerosissinils
capillaribus rectis æqualibus e capsulæ parietibus co-
luinellæque ortis. Caps, hinc plana, inde convexa.
Calypt. ext. e villis implexis, int. apice scabra. B r.
D. polytricboides. Brown in Linn. Trans, v. 10. ».316.
t a b .Z. f . l . (Tab. CLXII.)
H a b . Ripæ subumbro.sæ riviilorum, ad radices montium, in vici-
nitate Portus Jackson, Novæ Hollandiæ. D. Brown.
Radix tomentosa. Caules 3—4-unciales, simplices, erecti,
flexuosi, basi nudiusculi, superne foliosi. Folia e basi dilatata,
membranacea, fusca, lineari-subulata, supra plana, subtus
convexa, patentia, siccitate erecto-appressa, fusco-viridia, margine
dorsoque spinoso-deiiticulatis, nervo obsoleto, vix striato.
Seta terminalis, vix unciam longa, rubra. Capsula madore
horizontaliter reclinata, siccitate erecta vel paululum inclinata,
rufo-fusca, supra plana vel basin versus etiain concava, subtus
convexa, ore paululum contracto marginato. Calyptra duplex;
ext. e villis intertextis rufo-fuscis ; int. triplo minor,
membranacea, pallide lusca, supra longitudinaliter fissa, apice
scabriuscula. Operculum conico-cylindraceum, basi incrassa-
tum, apice lateris superioris mucrone subrecurvo, Peristomium
penicillatum, densum, album, e margine capsulæ apiceque
columeilæ ortum ; ciliis numerosissimis, capillaribus, paululum
flexuosis, inarticulatis. Columella angusta, corrugata.
I am happy to be able to figure this moss in the same number
with the Lyellia, they having many point.s in common, especially
the form of their capsules, although in the curious structure
of the peristome and the shape of the operculum I know of
nothing which resembles the Dawsonia. The male flowers I
have never seen ; but Mr. Brown has figured them, and given a
most elaborate plate and description of the whole plant in the
tenth volume of the Linncean Transactions.
Fig. 1, 1, plants, nat. size. Fig. 2, leaf. Fig. 3, capsule
when dry. Fig. 4, ditto in a moist state. Fig. 5, operculum.
Fig. 6, inner calyptra. Fig. 7, capsule cut open to show the
columella and the insertion of the peristome. Fig. 8, cilia of tlia
peristome.—magn.
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