Ser. RriODOSPEiiME^. Tam. Ceramiacece. 



Plate CXCVIIL 



PTILOTA JEANNERETTII, Haw. 



Gen. Char. Fro^id compressed or two-edged, disticlious, pectinate-pin- 

 nate, inarticulate, with an articulate mouosiphonous axis ; the pin- 

 nules sometimes articulate. Fructification : 1, involucrate favella, 

 containing numerous angular spores; 2, tetraspores attached to the 

 pinnules, sessile or stalked, solitary or glomerulate, tripartite. — 

 Ptilota {Ag^, from irrikwTO'i, pinnated. 



Frons compressa v. anceps, disticha, pect'mato-pinnata, corticata, axi articulato 

 wonosiphonio percursa ; pinnnlis sapius corticatis, nunc pellucide articidatis. 

 Fruct.: \,favell(Binvolucratcespora8nunierosasangulutasfoventes; 2, tetra- 

 sporcB ad phmulas sessiles v. pedicellate, sparsce v. glomerulata, triangule 

 diviscs. 



Ptilota Jeannerettii ; frond irregularly pinnato-decompound or subcorym- 

 boso-paniculate ; rachis two-edged, piano-compressed; braiiches alter- 

 nate or scattered, unequal, erecto-patent ; pinnules corticate, pectinal e, 

 unequal, acute, the uppermost frequently pinuellate ; favellse with an 

 involucre of articulated, monosiphonous ramelli; tetraspores corym- 

 boso-paniculate, terminating one-tubed, articulate ramelli. 

 P. Jeannerettii; fronde vage pinnato-decomposita v. corymhoso-paniculaia ; ra- 

 cJiide ancipito plano-compresso ; ramis alternis spnrsisve inaqualidns erecto- 

 patentihus ; pimiulis corticatis pectiuatis inaqualibus acutis, superiorlhHS sape 

 pinnellatis ; favelUs pedicellatis involucratis, involucri ramellis articidatis in- 

 curvis ; tetrasporis ramellos corpnboso-paniculatos monosiphonios articidatos 

 terminantibus. 

 Ptilota Jeannerettii, Harv. in Fl. Tasm. v. 2. p. 331 ; Alg. Austr. Exsic. n. 



479. 

 Thamnocarpus Ptilota, Hook.f. et Karv. in Land. Jour. v. 6. p. 409. 

 Caepothamnion ? Ptilota, Kiitz. Sp.Alg.p. 669. 

 Hab. Port Arthur, Tasmania, Br. Jeannerett. South Port, 3Ir. C. Stuart. 

 South Australia, Dr. Curdie. Port Fairy and Port Phillip Heads, 



r. //. //. 



Geogu. DisTR. South coast of Australia. Tasmania. 



Descr. Root a small disc. Frond a foot long and as much in the expansion of the 

 branches ; the stem and branches strongly couipressed or flattened, a line or a 

 line and a half in breadth. Main branches very irregularly inserted, alternate 

 or scattered, few or many, simple or decompound. The secoudary branches 

 more regularly pinnate or bipinnate ; but sometimes nearly bare and sub- 

 simple. Penultinate branches pectinated in their lower half with unequal, 

 subulate, inarticulate ramuU; in the upper, often set with pectinate branch- 



