210 ALGM RHODOSPERME/E. [Ceramium. 



Harv. in Hook. Br. Fl. v. ii. p. 335. Conf. coccinea, Dillw. 

 t. 36. E. Bot. t. 1055. 



Sea-shores, common. 6 8 inches high, bright red, and beautifully 

 pinnate. Stems thick, densely villose. 



2. D. ocellata, Harv. Ocellated Dasya. Stems short, slen- 

 der, subsimple, beset on all sides with long, erecto-patent, dicho- 

 tomous, penicellate ramuli ; articulations 3 4 times longer 

 than broad ; receptacles lanceolate, attenuate. Harv. in Hook. 

 Br. Fl. v. ii. p. 335. Cer. ocellatum, Grateloup. D. simpli- 

 ciuscula, Ag. Sp. v. ii, p. 122. 



Very rare. Black Castle, Wicklow ; W. H. Harvey. 



3. D. Hutchinsice, Harv. Miss Hutchins Dasya. Stems 

 short, slender, much and irregularly branched, beset on all sides 

 with very short, divaricating, dichotomous ramuli ; articulations 

 about twice as long as broad ; receptacles oblong, suddenly acu- 

 minate. Harv. in Hook. Br. Fl. v. ii. p. 335. Conf. Arbuscula, 

 Dillw. t. G. (excl. t. 85 .) 



Rocky shores, not uncommon. Bantry bay ; Miss Hutchins. Mil- 

 town Malbay ; Kingstown Harbour ; Killiney, and Wicklow ; W. H. 

 Harvey. Arran ; Mr. R. Ball. Stems tufted, 2 4 inches high, 

 much branched, and well distinguished from the preceding by the form 

 of its receptacles. As stated in the British Flora, this species was 

 once confounded with the very different Callithamnion Arbuscula ; 

 and Dillwynn figure, (t. G.) which represents its fruit, being referred 

 by him to the latter species, has caused no small perplexity to botanists 

 imperfectly acquainted with either. 



53. CERAMIUM. Adans. Roth. Ceramium. 



Frond filamentous : filaments articulated, mostly dichotomously 

 branched, reticulated with veins ; dissepiments opaque. 

 Fructification double: 1. Capsules with a membranaceous 

 pericarp, containing numerous angular seeds ; 2. simple ob- 

 long granules, imbedded in the ramuli. Name ; /ce/>a/ios, a 

 little pitcher ; from the form of the capsules : but as the genus 

 now stands, the resemblance is not striking. 



1. C. rubrum, Ag. Red Ceramium. Filaments cartilagin- 

 ous, irregularly branched, toruloso-contracted at the dissepi- 

 ments; articulations coloured, reticulated with veins. Harv. 

 in Hook. Br. Fl. v. ii. p. 336. Conf. rubra, Dillw. t. 34. E. 

 Bot.t. 1166. 



On rocks and Algae, very common. 



2. C. diaphanum, Roth. Variegated Ceramium. Filaments 

 thickish, irregularly branched, set with lateral, slender, dicho- 

 tomous ramuli; dissepiments swollen, opaque; articulations 

 hyaline, those of the principal stems 3 4 times as long as 

 broad, of the ramuli very short. Harv. in Hook. Br. Fl. v. ii. 



