Ser. RnoDOSPERMEiE. Fam. Rhodo?nelacea. 



Plate CLXXVI. (A). 

 BOSTRYCHIA WH^TK, Hook. f. and Haw. 



Gen. Char. Frond filiform, pinnately branclied, inarticulate (or subarti- 

 culate with very short internodes), tessellated with quadrate or hexa- 

 gonal cells ; axis tubular, articulated, surrounded by one or more 

 concentric rows of coloured cells. Bamuli hook-pointed. Fructifi- 

 cation : 1, ovate, terminal ceramidia, containing a tuft of pear- 

 shaped spores ; 2, fusiform, terminal sticJddia, containing a double 

 row of tetraspores. — Bostrychia [Mont.), from ^oarpvxo'i, a ringlet 

 or curl of hair. 

 Trans filiformis, pinnatim ramosa, inarticulata (v. vix articulata articnlis hre- 

 vissimisj celltdis hexagonis v, quadratis corticata. Axis tubulosus, artlcu- 

 latus, monosiplionius, celluUs uni-pluriseriatis endochromaticis superfciem 

 versus brevioribus circumdatus. RamuU siepissime involidi v. nncmatl. 

 Fruct. : 1, ceramidia ovata, terminalia, fasciculum spar arum pyriformiuvi 

 continentia ; 2, siichidia terminalia, fusiformia, tetrasporas biseriatasfoventia. 



BosTRYCHiA mixta; stems pinnate; pinnse patent, simple or forked or 

 alternately ramulous ; ramuli subulate, divaricate ; apices straight, 

 the younger subinvolute ; axils wide ; cortical cells hexagonal, wider 

 than long ; stichidia curved. 



B. mixta; caulibus pinnatis ; pinnis patentibus simplicibus v.furcatis v. alterne 

 ramulosis ; ramidis subulatis divaricatis ; apicihus strictis v. junioribus iu- 

 volutis; axillis latis; cellulis corticalibus hexagonis oblatis; stichidiis curvatis. 



BosTRYCHiA mixta, Hook.fil. and Ilarv. in Land. Jour. Bot. v. 4. p. 270 atid 

 p. 539. Harv. Ner. Austr.p. 70. Kiitz. Sp. Alg.p. 840. Harv. in Hook. 

 M. N. Zeal. v. 2. p. 225. Harv. Alg. Austr. Exsic. n. 148. Fl. Tasm. v. 2. 

 p. 298. 



Hab. Port Arthur, Tasmania, on stones between tidemarks, W. II. H. 



Geogr. Distr. Tasmania. New Zealand. Cape of Good Hope. 



Descr. Fronds half an inch long, densely tufted, or spreading in wide patches, 

 rising from creeping filaments. Stem.s simple, erect ; simply pinnate, or sub- 

 bipinnate toward the apex ; the lower pinnae subulate, erecto-patent, with 

 straight, acute apices, the upper slightly compound, with the apices hooked 

 or inrolled. Cells about 8 in a single row, their external (superficial) faces 

 hexagonal, wider than their length. Fruit not seen on Australian speci- 

 mens. Colour a very dull dark-purple. Substance somewhat rigid. It 

 imperfectly adheres to paper in drying. 



The genus BostrycUa, of which a great many species are now 

 known, in various parts of the world, has but few represen- 



