70 
CLASS XXI. ORDER VI. 
taining the fruit immersed in them, generally strung on threads ; mostly oj a 
grass-green or greenish colour, sometimes purple. They grow in fresh water 
streams, springs, ditches, and stagnant waters ; sometimes in damp woods, and 
some in the sea. 
Conper'^va. Filaments articulated, uniform, simple or branched, containing 
the seed within them. No external fruit. 
E. The section TREMELLiNis comprises the old ge7ius Tremella. Plants of this 
section are all gelatinous, hyaline, and covered with a membrane. They are 
globose, palmate, or filiforrri ; and contain conferva-like f laments loithin. Colour 
green or purplish. They resemble Confervoidece in habit and place of growth. 
Nos'^Toc. Flamentsmoniliform, constituted from coadunate globules. Fronds 
bullate, vesicular, (at length becoming flattened,) crowded with simple monili- 
form, curve-crisped filaments. 
ORDER V. LICHENES. 
Gyropii'^ora. Frond foliaceous, coriaceous-cartilaginous, peltate, monophyl- 
lous, (when luxuriant, polyphyllous,) free beneath; apothecia some, vhat shield- 
form, sessile-adnate, clothed with a dark membranaceous cartilage, including a 
somewhat solid parenchymous substance; disk warty or ciroinal, plicate and 
margined. 
Parme'lia. Frond coriaceous, sub-membranaceous, flat, expanded, close- 
pressed, orbicular, stellate and lobed, or multifid-laciniate, having fibres b-^neath ; 
apothecia shield-form, sub-membranaceous, formed under side from the frond, 
free, with a central puncture by which it is afiixed ; disk concave, coloured, 
covering the whole receptacle above, within similar, sub-cellular, and striate, 
cut round, inflexed with a frond-like margin. 
Cetra^ria. Frond cartilaginous or membranaceous, ascending or expanded ; 
lobe iaciniate, smooth and naked both sides; apothecia shield-like, obliquely 
attached to the margin of the frond, the lower free, being separated from it, 
ihe upper one sessile; seed bearing lamina forming the disk, coloured, plano- 
concave, surrounded with a frond-like inflexed margin. 
Cenomy'ce. Frond crusty or cartilaginous, foliaceous, Iaciniate, sub-imbricate 
free, (rarely adnate ;) bearing sub-fistulous peduncles (^oiZg^m) both barren and 
fertile ; receptacles (knobs) orbicular, without margins, at length convex and 
capitate, inflated or empty beneath, terminal attached to the peduncles by their 
peripheries ; seed bearing lamina forming the receptacle above, thickish, col- 
oured, similar within, convex, reflexed, and attached at the periphery, invested 
beneath with the woolly integument of the frond. 
B-E0MY''cEs. Frond crustaceous, flat, expanded, adnate ; bearing soft, solid, 
fertile podetia; apothechia capitate, without margins, solid, terminal, sessile on 
the peduncles ; seed bearing lamina covering the whole receptacle and adnate 
to it, convex reflexed. thickish, coloured, similar v^ithin. 
Us'^NEA. Frond sub-crustaceous, teretish, branched, mostly pendulous ; cen- 
tral part hyaline, elastic, composed of fasicles of tubes; receptacles orbicular, 
terminal, peltate, formed wholly from the frond, covered all over with its corti- 
cal substance, similar, nearly of a uniform colour; its periphery destitute of 
margin, but often surrounded by a ciliate edging. 
ORDER VI. FUNGI. 
Lycoper'^don. Receptacles somewhat caulescent, at length bursting at the 
top, with scaly warts or prickles scattered over its surface, especially when 
young. Seminal dust green. 
Mu'cor. Receptacle membranaceous, globose, stiped, at first watery and pel- 
lucid, then opake ; seeds naked, sub-cohering. Very minute and fugacious. 
Ure'do. Receptacle 0; seminal dust under the cuticle of leaves and stems, 
when ruptured it is easily brushed ofl"; the little masses of seeds uniform, 
mostly globose. 
Agar^'icus. Destitute of a volva at the base of the stipe, with or without the 
ring ; lamellae either entire or with shorter ones intermixed, rarely simple ra- 
mose. Never veiny. 
Bole'tus. Pileus various tubes and pores terete, entire. A large genus. 
