Ser. Rhodosperme.e. Earn. Rhodomelacea. 



Plate XLV. 



LENORMANDIA MUELLERI, Sond. 



Gen. Char. Frond leaf-like, proliferous. Phyllodia flat, membranaceous, 

 undivided, midribbcd, obliquely cross-striate, internally honeycombed 

 with rhomboidal cavities ; the surface-cells minute. Fructification 

 of both kinds scattered over the surface: the 1st, ovate, pedicellate 

 ceramidia, containing pear-shaped spores ; the 2nd, lanceolate stichi- 

 dia, containing tripartite tetraspores. — Lenormandia {Sond.), in 

 honour of M. Rene Lenormand, of Vire, Calvados, a distinguished 

 French algologist. 



Fro?is foliacea, prolifera. Phyllodia plana, membranacea, indivisa, costata, 

 decussation striata ; celtulis intimis magnis lacunosis oblique ordinatis, extimis 

 minutis inordinatis. Fruct. utriusque generis sparsus : 1, ceramidia pedicel- 

 lata, sporas pyriformes foventia ; 2, stichidia propria, lanceolata, tetrasporas 

 triangule divisas continentia. 



Lenormandia Muelleri ; caulescent; the stem cylindrical below, winged 

 upwards, vaguely branched ; branches linear, strongly costate, emit- 

 ting oblong, emarginate, basally attenuate, stipitellate, echinulate, 

 very entire phyllodia; ceramidia ovate, scattered over the disc. 



L. Muelleri; caulesceus ; caide basi tereti sursum alato vage ramoso ; rands 

 linearibus valide costatis coriaceis phyllodia oblonga emarginata basi-attenuata 

 stipitellata echinulata integerrima emittentibus ; ceramidiis ovatis sparsis. 



Lenormandia Muelleri, Sond. in Linn. v. 25. p. 696. Harv. Jig. Exsic. 

 Austr. n. 128. 



Lenormandia Curdieana, Harv. in Herb. T.C.D. (olirn). 



Hab. Cast ashore from deep water. Rivoli Bay, Dr. Mueller. Mouth 

 of the Glenelg, Br. Curdle (1851). Port Fairy, W. H. H. 



Geogr. Distr. South coast of Australia. 



Descr. Root discoid. Fronds tufted, 1-2 feet long, proliferously much branched. 

 In full-grown specimens there is a cartilaginous, terete stem, as thick as 

 whipcord, and one or more inches in length ; this gradually becomes 

 two-edged, and then winged upwards, dividing (proliferously) into 2-4 or 

 more principal branches, which are bordered with a narrow wing and tra- 

 versed by a thick midrib. These main branches are 6-8 or 1 inches long, 

 and quite simple, being formed out of a partially denuded phyllodium of a 

 former season : and they emit, from their midrib, numerous membranous 

 phyllodia, varying much in size. The phyllodia are 2-4 inches long, about 

 an inch wide, oblong, very obtuse or emarginate, tapering at base into a 

 short stipes or petiole, delicately membranous, traversed by a very slender 



