Alectoria.] LICHENES. *2*27 



smoothish very much branched greenish-grey, the main stem 

 stout articulated the branches very Jong slender capillary intricate 

 sometimes bearing fleshy tubercles. — Ac/i. Syn.p. 306. — Lichen 

 barbatus, Linn — L. articulatits, (3. E. Bot. t. 258. /. 2. — Dill. 

 Muse. t. 12. /. 6 3. articulata ; articulations of the stem re- 

 markably swollen. — Ach. Syn. p. 306. — Lichen articulatus, 

 Linn.—E. Bot. t. 258./. \.—Dill. Muse, t.ll.f.4. 



On trees in old woods, particularly in subalpine districts. The var. 

 /S. I have gathered on sands at Kxmouth Warren, Devon ; and I pos- 

 sess very fine specimens from sands by the sea- side near Malahidc, 

 Ireland, sent me by .7. T. Mackay, Esq. — No apothecia arc described 

 by Acharius, nor have they been ever found on British specimens. May 

 it not be a variety of one of the preceding? or rather may not all be 

 considered as mere forms of one species ? The same and various in- 

 termediate states are found in almost all parts of the world. 



/3. Thallus without a central thread, sometimes slightly compressed. 



FAM. XV. CORNICULARIE^. 



32. Alectoria. Ach. Alectoria. 



Thallus cartilaginous, subfiliform, branched, prostrate or pen- 

 dulous, somewhat fistulose and cottony within. Apothecia or- 

 bicular, thick, sessile, plane or convex, more or less bordered, 

 entirely formed of the thallus and of the same colour. — Name ; 

 xMKru^oq, a mane or hair, according to Acharius, but the word 

 will not bear such a construction, nor any that is applicable to 

 the plant. 



1. A.jubdta, Ach. (wiry Alectoria, or Rock-Hair); thallus 

 tufted generally pendulous very much branched (dive-brown 

 smooth shining, brandies filamentous slender often compressed 

 at the axils bearing powdery whitish warts, apothecia sessile 

 blackish with an entire margin. — Ach. Syn. />. 291. — Lit Inn 



jubaius, L'mn.—E. Bot. t. isso.— Dill. Mute. t. 12./ 7.— 

 /3. chalybeiformis ; branches shorter suberect or decumbent. 

 Ach. Syn.p. 291. — Lichen jufiatus, (3. E. Bote. L880, vppet 



figure. — Lichen chalybeiformis, Linn. — Dill. Muse. t. \:i.f. H>. 



Trunks of trees, especially of Rrsj upon rocks ami old pales ; abuw- 

 d.uit in subalpine countries. — Apothecia (if they were really such), wen 

 found l>y Mr. Turner and myself in the Highlands in 1807 and are 

 figured in B. Bot.; they are sessile, frequently oblong, the disl at length 



narked ami nigged with age. 1 innKUfl tells us that in winter, when 



the snow i> vei) deep upon the ground, this Lichen supplies the Rein- 

 deer with food;— for this purpose the Laplander cuts down the trees, 



that the plant upon the topmo-t branches may he accessible tO this 

 Useful animal. 



2. A. sfir/th -iitosa. AA\. ( f niilm;/ liectoria); thallus prmuni- 



hent somewhat compressed pale sulphur-colour pined smooth 

 branctied tin- branches rery much divaricated and forked the 

 ultimate one* short and eapilhuy. apothecia scattered Inters 

 sessHe c o nes w e greenish Heih-oolour with an entire border. — 



