Tiube X. Spongiocarpe.e. Plants carnose, cylindrical, in- 

 articulate. Fructification naked spongy warts, containing glo- 

 bules of red seeds. Hoot scutate. 



34. Polyides. The only genus. 



Tiube XL Furcellarie;e. Plants carnose, cylindrical, in- 

 articulate. Fructification terminal lanceolate receptacles. Root 

 fibrous. 



35. Furcellaria. The only genus. 



Tribe XII. Feoride;e. Plants coriaceous, membranaceous, 

 or cartilaginous ; foliaceous or filiform, inarticulate. Fructi- 

 fication double; 1. Capsules: 2. granules, imbedded in the 

 frond or indistinct receptacles. 



36. Delesseria. Frond leafy, with a percurrent, distinct 

 midrib. 



37. Nitophyllum. Frond delicately membranaceous, ex- 

 panded, ribless (often veined at the base). Fructification 

 double : 1. Capsules : 2. ternate granules, disposed in distinct 

 sori. 



38. Rhodomenia. Frond membranaceous, expanded, rib- 

 less. Fructification double : 1. Capsules ; 2. ternate granules, 

 disposed in cloud-like spots, or scattered over the whole frond. 



39. Plocamium. Frond filiform, much branched, branches 

 distichous, (ramuli pectinate.) Fructification double: 1. sphse- 

 rical sessile capsules : 2. lateral process containing oblong gra- 

 nules. 



40. Odonthalia. Frond subcartilaginous, plane, dark vi- 

 nous-rod, with an obsolete midrib, alternately toothed at the 

 margin. Fructification marginal, double : 1. Capsules, con- 

 taining pear-shaped seeds ; 2. slender, pedicillate receptacles, 

 containing ternate granules. 



41. Rhodomela. Frond cylindrical, cartilaginous, dark- 

 red, (apices often involute.) Fructification double : 1. subglo- 

 bose capsules, full of pear-shaped seeds ; 2. pod-like recepta- 

 cles, with imbedded ternate granules. 



42. Bonnemaisonia. Frond filiform, rose-red, delicate, 

 much branched, branches pectinate, with distichous ciliae. 

 Fructification : ovate capsules, containing a mass of pyriforni 

 seeds fixed by their base. 



43. Laurencia. Frond cylindrical, filiform, gelatinoso- 

 cartilaginous, yellowish or purplish-red. Fructification double: 

 1. ovate capsules, containing pear-shaped seeds fixed by their 

 base ; 2. ternate granules imbedded in the ramuli. 



u 



