Ser. RnoDOSPERMEiE. Fam. Laurenciacece. 



Plate XVI. 



DELISEA PULCHRA, Mont. 



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

 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 wartlike swellings {nemathecia) of the apices. — Delisea 

 (Lamour.), in honour of M. Delise, a French naturalist. 



From linearis, compresso-anceps, alterne decomposita, disticha, ramis ramulisque 

 argute pectinato-serratis, plus minus conspicue costata, filo centrali articulato 

 percursa ; strato medullari ex cellulis magnis rotundato-angulatis hyalinis, 

 corticali ex cellulis minutis pluriserialibus coloratis formato . Fruct. : 1, cera- 

 midia ovata ad costam prope apices ramorum sessilia, intra pericarpium cellu- 

 losum sporas oblongo-pyriformes longe pedicellatas foventia ; 2, tetrasporce 

 zonalim divisa in verrucis apices ramulorum investientibus evolutae. 



Delisea (Calocladia) pulchra; frond near the base subterete or com- 

 pressed, flat and midribbed upwards, decompound-pinnate; pinnae 

 virgate, alternate, once or twice compound; marginal teeth subulate, 

 rather longer than the breadth of the rachis; conceptacles subter- 

 minal, their apex pointing upwards. 



D. pulchra ; fronde basi incrassata subterete cartilaginea supra applanata costa- 

 taque decomposite pinnata, pinnis virgatis alternis sub-bipinnulatis ; dentibus 

 marginalibus latitudinem rachidis superantibus subulatis ; cystocarpiis ad 

 apices pinnularum in pagina plana sesdlibns erectiusculis. 



Delisea pulchra, Mont, in An. Sc. Nat. ser. 3. v. 1. p. 158. Hook. fit. et 

 Harv. Fl. Ant. v. 2. p. 484 (excl. syn.). Harv. Ner. Aust. p. 89. t. 34. 

 Kiitz. Sp. Alg. p. 770. J. Ag. Sp. Alg. v. 2. p. 784. Harv. Alg. Exsic. 

 Aust. n. 246. 



Bowiesia pulchra, Grev. Alg. Brit. Syn.p. 57. 



Calocladia pulcha, Grev. in Lindl. Introd. ed. 2. p. 436. 



Bonnemaisonia pulchra, Midi. 3rd. Suppl. p. 44. 



Hab. New Holland, Frazer. Western Australia, rare, W. II. H. Abun- 

 dant on the coast of New South Wales, at Newcastle, and Kiama, 

 W. H. H. Tasmania, Herb. Paris. Port Arthur, W. H. H. 



Geogr. Distr. Western and eastern shores of Australia. Southern shore of 

 Tasmania. Kevguelen's Land, Dr. Hooker ! 



