Endocarpon.] L I C H E N ES. 1 5 7 



ileum, Ach. Licit. Univ. p. 290. — Lichen lachneus, Ach. Prodr. 

 p. 140. E. Bot. t. 1698. — y. squamulosum ; lobes of the thallus 

 aggregate sub-imbricated lobato-crenate pale fibrillose and 

 woolly beneath. Ach. Syn. p. 99. — Lichen leptophyllus, E. Bot. 

 t. 2012, (excluding the synonyms). 



a. On barren heaths, near Croydon, Mr. Dickson ; and in Norfolk, 

 Mr. D. Turner. (3. Common on the Sussex downs, and on rocks at 

 Cheddar and Bristol Hot-wells, Mr. Borrer. y. Hill of Kinnoul, near 

 Perth, and other places in Scotland. — This varies much in colour and 

 a good deal in form, and constitutes, with the following five species, a 

 little groupe, which might, as it appears to me, be considered as states 

 of one and the same species, without much violence to nature. 



3. E. pallidum, Ach. (pale-leaved Endocarpoii); thallus foli- 

 aceous somewhat imbricated lobed crenate pale greenish-grey 

 slightly spongy and black beneath the outermost lobes pale and 

 naked on the underside, apothecia immersed black. Sm. — 

 Ach. Syn. p. 100.— Lichen pallidas, E. Bot. t. 2541. 



On rocks thinly covered with earth, Ireland, Sir Thomas Gage. — 

 This Mr. Schaerar unites with E. Hedwiuii. 



4. E. psoromoides, (bark Endocarpoii); scales between 

 tartareous and leafy small crowded somewhat imbricated ap- 

 pressed lobed waved tumid olive-green with slightly elevated 

 crenate whitish downy edges underside black and spongy, apo- 

 thecia immersed nearly globular pale except the slightly promi- 

 nent blackish-brown apex. — Verrucaria psoromoides, Borr. in 

 E. Bot. Suppl. t. 2612./. 1. 



Probably rare. On Elm bark at Hurst-pierpoint, and on Ash at Beed- 

 ing, Sussex. — With the exception of E. pulchelliim, no other Endocar- 

 pon has been observed to grow on trees. It differs, Mr. Borrer tells us, 

 from its nearest affinity, E. pallidum, in its less truly imbricated and more ap- 

 pressed mode of growth, the edges only of the scales being slightly raised ; 

 in the really fibrous texture of the underside; and, in some degree, in the 

 figure of the scales and incisions of the edges; and not less in the 

 tubercles. " These, in the present species, have in the immersed part a 

 thin peritheeiuin, of no darker colour than the nucleus; such, we pre- 

 sume, as Acharius held essentially characteristic of a genuine Endocor- 

 pon ; whilst those of E. pallidum have, in every part, a thick black shell. 

 In this respect E. sorediahim agrees with E. pallidum; and it fur- 

 ther differs from E. psoromoidet by the peculiar apex of its tubercles, by 

 the larger scales of its tlutlhts and their much more downy or rather 

 spongy edges." 



5. K. leptophyllum, Ach. (tmail4eaved Endocarpo n ); thalluscar- 



tilaginous foliaceOOfl orbicular peltate blacki-h-brow n or inclining 



to grey, the circumference spreading flexuose, beneath smooth 

 and naked w Tinkled Bubplicate and black, points ofthe apothecia 

 black somewhat prominent. Ach, Syiup, 102, — Lichen lepio* 

 phyllut* B, Bot* t. 20 I 2. f, •_'. only* (according to Mr* Borrer)* 

 Rocks by the shore of Loch Lomond, Mr, Borrer* Rocks by 

 enthwaite water, Cumberland, .1/'. Robertson* 



<i. K. fApiocum* Ach. (curled peltate Endocarpo n ); ■ eoruv 



