Ser. Melanosi'krmr/H. Fam. Dicti/otacece. 



Plate CXC. 



ZONARIA INTERRUPTA, jr;. 



Gen. Char. Root woolly. Frond flat, ribless, coriaceo-membranaceous, 

 flabelliform, entire or vertically multifid ; the surface-cellules set iu 

 longitudiual lines, radiating from the base of the segments. Fructifi- 

 cation : sjjores superficial, collected in spot-like soii, and mixed with 

 jointed paranemata. — Zonaria {Ag.), from ^(ovrj, a zone or girdle ; 

 because the frond, in many species, is marked with distant, concen- 

 tric lines. 



Radix stuposa. Frons plana, ecostata, coriaceo-membranacea, flabellata, uiter/ra 

 V. midtisecta ; celluUs superjicialibiis in lineas longitudinales e basi lac'mia- 

 rum radiantes ordinatis. Friict., sporoR in soros mactdiformes coUectcB, para- 

 nematibiis articulatis stipates. 



Zonaria interrupta ; erect ; stem terete or winged, elongate, woolly, 

 branching ; branches ending in deeply parted, basally woolly laminee, 

 whose segments are narrow-linear, truncate, sparingly toothed or in- 

 cised, and here and there irregularly constricted; apices lineari-cu- 

 neate, radiately striate ; sori oblong, scattered. 



Z. interrupta ; erectiusctda, stipite terete v. alato elongato stiiposo ramoso ; ramis 

 in laminas profunde partitas inferne stiiposas abeuntibus eorum laciniis an- 

 guste linearibus truncatis puree dentatis 'incisisve hie illie couHlrietis ; apicibus 

 linear i-euneatis radiatim striatis ; saris oblongis sparsis. 



Zonaria iuterrupta, Jg. Sp. Alg. v. l.p. 137; Syst.p. 268. Siihr, Eckl. 1. 1 ./. 

 5. Harv. in Hook. M. Nov. Zel. v. 2. p. 218. Rook. Ft. Tasm. v. 2. p. 290. 



DicTYOTA interrupta, Lamour. Ess. p. 57. t. 12./. 1. 



Phycopteris inteiTupta, ^. Phyc. Gen. p. 341. Sp. Alg. p. 564. 



Fucus interruptus, Turn. Hist. t. 245. 



Hab. Port. PhiUip Heads, IF. H. H. Tasmania, Lahillardiere, Giinn, etc. 



Geogr. Distr. South coasts of Australia. Tasmania. New Zealand. Cape 

 of Good Hope. Madagascar, Commerson. 



Descr. Root a broad callus, thickly clothed with woolly, entangled, foxy fibres. 

 Fronds tufted, 4-6 inches long, much divided, fastigiate, in outline more or 

 less fiabelliform. Stipes elongate, the young one winged, the older terete, 

 well coated with woolly, curled fibres, which extend as a tomentum over 

 the bases of the laminre tiiat terminate the branches. Branches vaguely 

 divided, somewhat dichotomous, vertically cleft nearly to the base into nu- 

 merous narrow-linear, simple, bilid or trifid segments , these are 1-1 1 inches 

 long, ruucatc at the tips and subtruucate, here and there toothed along the 

 sides and constricted, the strictures generally marked by a zone, indicating 

 a former stoppage of growth or of apex. Substance thick, opaque, coriaceous. 



