CRYPTOGAMIA ALG.E. 237 



all sides irregularly and closely, the branches being them- 

 selves branched and very slender, but nowhere fascicu- 

 late. The articulations of the stem are equal in length to 

 their breadth; those of the branches somewhat longer. 

 The only fruit I have seen are tubercles imbedded in the 

 extreme branches. Adheres slightly to paper. 



4. P. Brodiai, purplish -brown, soft, very bushy ; main stalk not 

 jointed, irregularly branched, ultimate branches fasciculate, dicho- 

 tomous, tapered, with articulations longer than broad SPRENG. 

 Syst. Veg. iv, 349. Hutchinsia Brodicei, HOOK. Scot. ii. 88* Hut. 

 atro-rubescens, L.YNGB. Hydroph. Dan. 110. Conferva Brodiai, 

 DILLW. Con/, p. 81. t. 107. 



Hab. On rocks and other Algse, not common. 



On this coast P. Brodiai does not exceed 4 inches in height, 

 and is often much less. It is soft, dark brown, very bushy, 

 and on drying adheres closely to paper. The stem is oli- 

 vaceous, without any appearance of joints, but the branches 

 exhibit plainly enough the character of the genus. The 

 ultimate ones often contain tubercles, and are terminated 

 with pellucid fibres. The description which LYNGBYE 

 gives of his Hutchinsia atro-rubescens agrees very well with 

 our plant, but the figure of that species in DILLWYN, to 

 which he refers, corresponds neither with his own descrip- 

 tion nor with our specimens. 



5. P. badia, reddish-brown, branched ; branches erect, straight, 

 elongate ; secondary branches alternate, straight, tapered, nearly 

 simple; articulations longer than their diameter, polystriate 

 SPRENG. lib. cit. 350. Conferva badia, DILLW. Conf. p. 85. t. e. 

 Hutchinsia badia, HOOK. Scot. ii. 88. 



Hab. Near low-water mark growing in sand. 



About three inches high. The lower articulations are shorter 

 than their breadth, the others about twice as long, ex- 

 cept those of the ultimate branches which are again shorter, 

 and have pellucid joints. Adheres imperfectly to paper. 

 The figure of DILLW YN has been copied from bad specimens. 



(j. P. stricta, tufted, red, branched, straight ; branches alter- 

 nate, erect, rather close, dichotomous at the top ; articulations of 

 the main filaments 5 times as long as their diameter, those of the 

 branchlets shorter, 2 or 3 striate. GREV. Fl. Edin. 309. Hul- 



