1 60 ACOTYLEDONS. — ZQ,u ISSTACE^ . EqUlSCtum . 



Hab. Highland mountains, frequent. 



Used in Raasay, near Skye, and some other places, instead of alum, 



to fix the colours in dyeing. The Highlanders employ it, in infusion. 



as an emetic and cathartic ; but it operates violently, and, unless 



taken in a small dose, brings on giddiness and convulsions. Light/. 

 Linnaeus says, that the Swedes use a decoction of it to destroy lice on 



smne and other animals. 



Order IX. MARSILEACE^. Br. 



FriLCt'rficaiions radical, hivolucrum suhsphaerical, not opening, 

 coriaceous or membranaceous, one- or many-celled. Aquatics. 



1. ISOETES. 



Capsule membranaceous, not opening, immersed in the base of 

 tlie frond, one-celled. Seeds angular, inserted upon many fili- 

 form receptacles. 



1. I. lacustris, Lighif.p.GSS. E. B. M084. 



Hab. Bottoms of the Highland lakea, not uncommon. In Jura and 

 Skye, Light/. Loch Tay, Dr. Stuart. Loch of Clunie, Rev. Mr. 

 M'Fdtchie. Loch Lomond, Mr. Murray. Loch Leven, Mr. Arnott. 

 Shallow parts of the Lake of Montcith, Mr. Young. 



hfA.-^'^ all radical, o — 6 inches long, t^iibulate, semicylindrical, fleshy. 



2. FILULARIA. 

 Involucres imbricated, solitary, nearly sessile, globose, coriaceous, 



4-celled. Cells containing two ditferent kinds of bodies, an- 

 thers P and capsules? 

 1. P. glohuliftra. Light/, p. 683. £. B. ^.621. Hook, in Ft. 



Lojid. with a figure. 

 Hab. Damp places that are overflowed during the winter, but not 



common. Braid hill marshes, Pentland hills ; Cuthel muir, &c. 



Mr. Arnott. Loch of Cluny, Rev. Mr. M'-Ritchie. Loch Lomond, 



Mr. Murray. 

 67eHzs filiform,creeping. Leaves'! — 3 inches long subulato-filiform,clu 



tcrcd. Involucres aslarge as peas, brown, scaly at the base of the 



leaves. 



Order X. EQUISETACB^. 



Fructification terminal, spicate, consisting of peltate polygonous 

 scaies,on the under side of which are from 4 — 7 involucres, which 

 open longitudinally, and contain numerous naked (?) seeds, en- 

 folded by four filaments bearing anthers (?) at their extremities. 



Veaetation: 5/em5 rigid, leafless, jointed, striated, the articulations 

 sheathed at the base, the branches whorled. 



1. EQUISETUM. 

 1. E. arvmscj sterile stems decumbent with simple branches. 



