404 87. Usnea. 3. HOMOTHAL AMEiE. PL cell. aph. 
y . kirta. Thallus slightly upright, rather shrublike, yel- 
lowish grey, much branched, rather powdery, roughish; 
branches much divided, bent, intricate, slender, fibreiike. 
3. Usnea barbata. Bearded usnea . 
Thallus hanging, smooth, round, rather thick, pale 
greenish grey; branches, diverging, frequently fibrelike, hair- 
like at the tip, beneath jointed. 
Lichen barhatus, Lin. Sp. PI. 1622 ; Engl. Bat. 258, fig. 2. 
Usnea barbata, Achar. Meth. Lick. 315 ; Lich. Univ. 624. 
On the branches of old trees. 
12. articulata. Thallus bald, grey, branches long, forked, 
branched, jointed ; joints bellied, separate; last twigs hair- 
like, fibrelike. 
Lichenoides quod Muscus arboreus nodosus, Rail Syn. 65,4. 
Usnea barbata articulata, Achar. Lich. Univ. 605. 
Lichen artieulatus, Lin. S. P. 1623 ; Engl. But. 258, fig. 1. 
C. liAMALiisriDEiE. Thcdlus cartilaginous, branched ; 
inside stuffed with fibres like tow ; apothecia same colour 
as the thallus, formed entirely from it. 
IX. 88. CORNXCUL A RI A. Horn-moss . 
Thallus cartilaginous, rather solid inside, towlike, 
branched, shrublike; apoihecia orbicnlate, terminal, oblique, 
shieldlike, entirely formed of the thallus, similar to its outer 
surface, become convex and rather inflated ; edge scarcely 
distinct, slightly toothed, at length turned back, .slightly 
altered in colour. 
1. Cornicularia tristis. Dull horn-moss . 
Thallus pitch-black, compressed, cylindrical, rather 
smooth, 2-rowed, 2-forked; branches even-topped, black 
above; apothecia plano-convex, brownish black, slightly 
margined, edge not toothed, not cut. 
Coralioides cornicuiafum, fuel lenuioris facie, Dillen Muse. 118. 
Lichen radiatus, lluds. FI. Angl, 559; Dicks. Crypt. 9, 25. 
Lichen fucoides, Wulf. in Jacq. Coll. 3. 
Lichen corniculatus, Light/. FI. Scot. 385. 
Lichen rigid us, Wulf. in Jacq. Coll. 2. 
Lichen tristis, Engl. Bot. 720. 
Lobaria rigida, Hoffni. Germ. 142. 
Cornicularia tristis, Achar. Meth. Lich. 300; Lich. Univ. 610. 
On rocks. 
Apothecia sometimes radiately toothed, and the branches 
tuberculated, toothed. 
