392 CRYPTOGAMIA — MARSILEACE.'E. {Pilularia. 



Moist heathy places ; but not very common. 



4. L. selaginoides, L. (^lesser alpine Club-moss) ; spikes termi- 

 nal solitary sessile, stem creeping, branches few ascending simple, 

 leaves scattered lanceolate subpatent ciliato-denticulate. E. 

 Bot. t. 1 ] 48. 



Bogg-y and springy spots, by the sides of mountains in the north ; not 

 unfrequent. Sandy coast of Lancashire and Anglesea. 



5. L. alpinum, L. (^Savin-leaved Cluh-inoss) ; spikes terminal 

 solitary sessile short cylindrical, stem prostrate, branches dicho- 

 tomous and fascicled, leaves in 4 rows oblong convex acute 

 appressed. E. Bot. t. 234. 



On the more elevated mountains of the north, frequent. — It is used in 

 many countries to dye woollen cloth of a yellow colour. 



6. L. Seldgo, L. (^Fir Cluh-moss); capsules in the axils of the 

 common leaves (not spiked), stem dichotomously branched erect 

 fastigiate, leaves in about 8 rows lineax'-lanceolate acuminate 

 entire imbricated rigid. E. Bot. t. 233. 



Heathy and stony soils, most abundant in mountainous countries. — 

 Used in the Highlands, instead of alum, to fix colours iu dyeing, also as 

 an emetic or cathartic, but it operates violently. The Swedes employ it 

 to destroy lice on swine and other animals. 



CRYPTOGAMIA—MARSILEACE^. 



1. IsoETES. Linn. Quill-wort. 



1. I. lacustris, L. (^Europcean Quill-wort); leaves subulate 

 bluntly 4-angular of 4 longitudinal internally jointed tubes. E. 

 Bot. t. 1084. Hook, in Fl. Lond. N. S. t. V3\. 



Bottoms of lakes in the north of England, Wales and Scotland. — A 

 very singular aquatic ; its fructification being entirely concealed at the 

 base of the cellular, subulate leaves. Mr W. Wilson considers the fructi- 

 fication to be of two kinds : — in one the contained granules are oval, 

 pellucid, and without sutures ; in the other they are sphserical and split- 

 ting at the sutures into 4 portions (one portion hemisphseFical, the other 

 3 triangular) and they are rough on the surface. The same acute Botanist 

 also finds 2 vars. in Wales ; the one densely tufted, with slender erect 

 leaves ; the other solitary and with broader leaves widely spreading. May 

 not the former be the /. setacea of Bosc ? 



2. PiLULARiA. Linn. Pill-wort. 



1. P. globulifera, L. (creeping Pill-wort). E. Bot. t.S2\. Hook, 

 in Fl. Lond. N. S. t. 83. 



Margins of lakes and pools, and in places that are partially overflowed. 

 — Stems creeping, long and entangled. Leaves setaceous, erect, 2 or 3 

 from one point, 4 — 3 inches long. Involucres at the base of the leaves, 

 about the size of small peas, brown, downy on the outside. 



I 



