Bonncmaisonia.] ALGvE RHODOSPERMEiE. 197 



On our northern shores, rare. Antrim ; Dr. Scott. Portstewart ; 

 Mr. D. Moore. 5 — 8 inches long, simple, shaggy, rope-like. 



2. R. subfusca, Ag. Brownish Rhoclomela. Frond filiform, 

 much and irregularly branched ; branches subulate, pinnate, 

 and alternate, often clustered. Hook. — Hook. Br. Fl. v. ii. p. 294, 

 Turn. Hist. t. 10. E. Bot. t. 1164. 



Bantry bay ; Miss Hutchins. Youghal ; Miss Ball. 4 — 8 inches 

 high, much branched. Branches attenuate. Colour a dull reddish- 

 brown. In the winter the branches are much broken, and quite des- 

 titute of the delicate ramuli which clothe them in summer. 



3. 11. jrinastroides, Ag. Pinaster-like Rhodomela. Frond 

 terete, irregularly branched ; branches with numerous secund, 

 spuriously jointed ramuli ; apices incurved. Hook. Br. F I. v. \\. 

 p. 294.— Fucus pin. Turn. t. 11. E. Bot. 1. 1042. 



Sea-shores, not rare. Near Dublin ; Dr. Scott. Wicklow ; W. 

 II. Harvey. Distinguished by its secund, spuriously jointed, incurved 

 ramuli. 



4. R. scorpioides, Ag. Scorpions-tail Rhodomela. Frond 

 cylindrical, slender, attenuated, three or four times pinnated, 

 with horizontal branches, the uppermost involute at the extre- 

 mity. Hook. Br. Fl. v. ii. p. 294. — Fucus amphibius. Turn, 

 t. 109. E. Bot. t. 1428. 



On rocks in the sea, salt marshes, &c. At Portstewart, North of 

 Ireland ; Mr. D. Moore. Fronds 2 — 3 inches high, much branched 

 in a distichous manner. Branches very patent, with involute apices. 

 The capsules of this plant are a desideratum. 



42. Bonnemaisonia. Ag. Bonnemaisonia. 



Frond membranaceous, compressed or plane, filiform, much 

 branched, the branches pectinate with distichous cilise. 

 Fruct. ; sessile or pedicellate capsules, containing a cluster 

 of pyriform (compound?) seeds, fixed by their base. Grev.— 

 Named in honour of 7H/. Bonnemaison, a French Algologist. 



1. B. arparagoides, Ag. Finely-branched Bonnemaisonia. 

 Frond compressed (or terete), excessively branched, filiform; 

 branches alternate, irregularly pinnated, set with alternate, sub- 

 ulate, distichous cilice ; capsules pedicellate, opposite the cilia?. 

 Hook. Br. Fl. v. ii. p. 295. — Fucus asparag. Woodw. Turn. 

 t. 101. E. Bot. t. 571. — /3. frond capillary, terete; ciliae very 

 long. 



Not rare in Ireland. Bantry ; Miss Hutchins. Near Belfast; Dr. 

 Drummond. Miltown Malbay ; Joshua Fennell, Esq. Kilkee, fre- 

 quent ; W. H. Harvey : and var. £. at Kingstown, near Dublin, and 

 Wicklow. One of the most beautiful of British Floridca?, of a fine 

 rose red colour, and most delicately branched. 



