ACOTVLEDONS. ALG.E. Hutchinsia* 87 



rather rigid, articulations twice as long as they are broad. 



Ag. p. 68. Conferva aurea,. Dillw. t. 35. Byssus aurea, 



Lighlf.p. 1002. E. B. f.212. 

 HAB. Rocks in the Highland mountains, frequent, Light/. Rare 



about Glasg.j below a rock at Mugcloch castle, Hopk. Upon the 



bark of trees, about Edinb., where it grows much smaller, yet 



bearing capsules,, Mr. Arnott. 

 In the Herbarium, the colour changes to dull brownish yellow. The 



capsules are figured by Dillwyn, both lateral and terminal, oval. 



16. HUTCH1NS1A. 



Fruit of two kinds : ovate reticulated capsules, and swollen 

 branchlets containing globular seeds. Filaments formed of a 

 number of parallel tubes. Filaments more or less tufted, 

 purplish, gradually attenuated, very much branched in asub- 

 fasciculated manner and jointed, frequently swelling at the 

 joints; articulations composed of a number of parallel tubes, 

 which give them a striated, rarely a reticulated, appearance; at 

 the extremity of the branches, particularly when young, often 

 having a small, pellucid tuft of hairs. Fruit of two kinds: 

 ovate capsules, broader at the base, acuminated at the point, 

 sometimes truncated, sessile with a few pyriform seeds ; and 

 seeds or globular granules, longitudinally arranged and imbed- 

 ded in pod-shaped branchlets. 



1. H. fastigiata, filaments dichotomous nearly equal fastigiate, 

 articulations shorter than broad with a dark spot in their cen- 

 tre. Ag.p.53. Conferva, polymorpha* E.B.t. 1764. Dillw. 

 Conf. t. 44. Light/, p. 989. 



HAB. Upon the rocky shores and on the larger Fuel, abundant. 



A rigid, stout plant, of a very dark brown colour, black in drying, 



the branches forming a nearly level top, and the articulations with 



a, central spot. 



2. H. elongata, filaments dichotomous very much branched, 

 branches elongated the ultimate ones very slender, articulations 

 rather shorter than they are broad reticulated with veins, the 

 lower joints obsolete. Ag. p. 54. Conferva elongata, E. B. 

 *. 2429. Dillw. Conf. *.33. 



HAB. Adhering to rocks, shells, and the larger Fud. Firth of Forth, 



near Kirkcaldy, Mr. Greville. 



The largest of our Conferva, though not the longest, and aptly named 



in some places Lobster-horn Conferva. It is in length from 4 to 8 



or 9 inches, and of a dark purplish red colour. Capsules ovate, 



s^sile^by no means common ; still rarer are the minute fasciculated 



[>o(t. figured by Dillwyn in his supplementary plate, Tab. C. 



1- J j coideSy filaments very much branched diffuse, branch * 



su v^a|e alternate, articulations below shorter than broad, 



above abu^ half as long again as broad, capsules ovate late- 



