Ser. RHODOSPERME. Fam. Rhodomelacea. 
Prats CCXCII. 
BOSTRYCHIA HARVEYI, ent. 
Grn. Cuan. Frond filiform, pinnately branched, inarticulate (or subarti- 
culate with very short internodes), tessellated with quadrate or hexa- 
gonal cells; aais tubular, articulated, surrounded by one or more 
concentric rows of coloured cells. Ramuli hook-pointed. Fructifi- 
cation: 1, ovate, terminal ceramidia, containing a tuft of pear- 
shaped spores; 2, fusiform, terminal s¢ichidia, containing a double 
row of tetraspores.—Bosrrycuta (Mont.), from Bootpuyos, a ringlet 
or curl of hair. 
Frons filiformis, pinnatim ramosa, inarticulata (v. vie articulata articulis bre- 
vissimis) cellulis hexagonis v. quadratis corticata. Axis tubulosus, articu- 
latus, monosiphonius, cellulis uni-pluriseriatis endochromaticis superficiem ver- 
sus brevioribus circumdatus. Ramuli sepissime involuti v. uncinatt. Fruct. : 
1, ceramidia ovata, terminalia, fasciculum sporarum pyriformiuim continentia ; 
2, stichidia terminalia, fusiformia, tetrasporas biseriatas foventia. 
Bostrycuta Harvey: ; stems (bi-tri-uncial) capillary, bi-tri-pinnate, flexu- 
ous; pinne distichous, alternate, patent, pinnules 2—3-fid or alter- 
nately or subdichotomously multifid, the terminal ones strongly in- 
rolled; surface throughout dotted with minute, quadrate cells; axile 
cells in several rows. 
B. Harveyi; caulibus (2-3-uncialibus) capillaribus bi-tri-pinnatis flexuosis, 
pinnis distichis alternis patentibus, pinnulis 2-3-fidis v. alterne v. subdicho- 
tome plurifidis, terminalibus involutis, cellulis superficialibus minutis quadratis 
numerosis, axilibus pluriseriatis. 
Bostrycuta Harveyi, Mont. Fl. Chil. Cell, 11. p. 307. t. 16. f. 41. Harv. 
in Fl. Nov. Zel. v. 2. p. 225. Fl. Tasm. v. 2. p. 299. 
Has. Sealer’s Cove, Gipps’ Land, Dr. F. Mueller. Tasmania, C. Stuart. 
Geoer. Distr. Coast of Chili. New Zealand. 
Descr. Fronds densely tufted, spreading in patches over sticks and straws, etc. 
accidentally submerged, 1-3 inches high, somewhat thicker than human 
hair, bi-tri-pinnated. The principal stem and branches are angularly flexu- 
ous or zigzag; all are dotted with minute surface-cellules, and a cross-sec- 
tion shows them to be composed of several rows of hexagonal cells, each 
containing a bag of dark-purple endochrome. Pinue@ alternate, variable in 
length, long and short intermixed, patent, once or twice compounded. The 
pinnules also vary in degree of composition ; the lowest are often quite simple, 
those next in order bifid or trifid, and the uppermost frequently multifid or 
