Ser. RiioDosPERME^. Fam. Laurenciaceas. 



Plate CXXXIV. 



DELISEA HYPNEOIDES, Harv. 



Gen. Char. Frond linear, compressed, two-edged, alternately decora- 

 pound, distichous, the branches and ramuli pectinato-serrate, with 

 an immersed costa, and central articulated filament; medullary 

 stratum composed of roundish-angular, closely-packed cells; cortical, 

 of very minute, coloured cellules in several rows. Fruit : 1, obliquely 

 ovate ceramidia, sessile on the midrib, near the summit of the branches, 

 containing a tuft of pear-shaped spores; 2, zonate tetraspores im- 

 mersed in wart-like swellings {nemathecia) of the apices. — Delisea 

 {Lamour.), in honour of M. Delise, a French naturahst. 



Froris linearis, compresso-anceps, alterne decomposita, disticJia, ramis ramtdisque 

 argute pediiiato-serraiis, plus minus conspicue costata, filo centrali articidato 

 percursa ; strata medullari ex cellulis magnis rotundato-angulatis hgalinis, 

 corticali ex ce.UuUs miiiutis pluriserialibus color atis for mato. Fruct. : 1, cera- 

 midia ovata ad costam prope apices ramorum sessiUa, intra pericarpinm cellu- 

 losmn sporas ohlongo-pyriformes longe pedicellatas foventia ; 2, tetraspora 

 zonatim divisce in verrucis apices ramtdorum investientibus evolutce. 



Delisea hypneoides ; frond filiform, slender, flaccid, flexuose, decom- 

 poundly much branched; branches erecto-patent, the primary long 

 and virgate, secondary and tertiary short, all distichously ciliate; 

 cilia filiform-subulate, distant, alternate or secund, often pectinate on 

 one edge; ceramidia sessile on the rachis under the tips of the 

 branches, ovate, opening transversely. 



D, hypneoides ; fronde filifornii gracili Jlaccida Jlexuosa decomposite ramosis- 

 sima, ramis erecto-patentlhus, primariis lougissime virgatis, secundariis tertia- 

 riisque v/imril/us, omnibus disticlte ciliatis, ciliis filiformi-subulatis distantibus 

 alternis v. secundis, scepe iino latere pecliiiatis, ceramidiis infra apices ramu- 

 lorum in racJdde sessilibus laieralibus ovatis, ore laterali. 



Delisea hypneoides, Harv. Alg. Austr. Exsic. n. 248. Harv. in Hook. Fl. 

 Tasm. V. 2. p. 305. 



Hab. Western Port, Victoria, 7F. II. II. Georgetown, Tasmania, Fev. 

 John Feredai/. 



Geogr. Distr. South coast of New Holland. Tasmania. 



Descr. Frond 2 feet long or more, scarcely quarter-line in diameter, filiform, 

 subcompressed, excessively branched, disticlious. Primary branches a foot 

 or more in length, flexuous, irregularly set throughout wi'th lateral, subal- 

 ternate, secondary branches of various lengths, longer and shorter intermixed 



