Endocarpon.] LiCHENES. 155 



26. V. niyrescens, Pers. (dark-stained Rock Verrucaria'); 

 crust of a deep olive-black solid most minutely cracked, apo- 

 thecia of the same colour half-immersed slightly convex with a 

 central pore. Sni.-^—Pers. in Ust. Ann. 14.^.56 — Pyrenula 



nigrescens, Ach. Syn. p. 126 Verrucaria umbrina, Ach, Jlelh. 



p. 122. — Lichen umbrinus, Ach. Prodr. — E. Pot. t. 1499. 



Common on shady rocks and stone walls, even about houses. 



27. V. stridtula, Ach. (sharp-tube rcled Bock Verrucaria); 

 crust defined dendritic greenish-black limited with the areola? 

 somewhat separated imperfectly branched radiating, apothecia 

 cone-shaped at length slightly concave and margined at the ex- 

 tremity, the nucleus punctiform and transparent. Ach. Syn. 

 p. 95. — (3. acrotella ; crust scarcely any, apothecia minute 

 scattered somewhat confluent black unequal convex pointed 

 umbilicated. Sm. — V. acrotella, Ach. Meth. p. 123. — Lichen 

 acrotellus, E. Bot. t. 1712. 



(•>. On flint-stones, Sussex, Mr. Borrer. 



*** Growing on earth or decayed mosses. Terricohe. 



28. V. Hooheri, Borr. (Hookerian Ground Verrucaria); crust 



thick of pure white tumid tartareous scales covering a black 

 spongy substance, apothecia ampulliform black immersed ex- 

 cept the conical or truncated apex. Borr. in E. Bot. Suppl. 

 t. 2622./. 2. 



On dead mosses, on the micaceous soil of Ben Lawers, in the hollow 

 Dear the summit where Saxifraga cernua grows, Mr. Borrer. Also in 

 similar situations on Maelgreadha and the other Breadalbane mountains, 

 not unt'rcquentlv growing on the bare soil composed of comminuted 

 schist. — This, Mr. Borrer observes, " is very unlike any other Verrucaria 

 with which we are acquainted, both in its tliaUu* ■duAfnu/i/icafi n. The 

 thick, turgid, somewhat lobed, tartareous scales are similar in figure to 

 those of Lichen fntsttdosus, E. But- 1. 2273, but of a much smaller size : 

 their internal substance is green." 



•_".>. V. epigda, Ach. (greenish Ground Lichm ); crust pale 

 yellowish-green or grey somewhat fibrillose slimy when moist, 



apothecia minute globose immersed black within and with a 



minute point. Ach. Syn. />. 96. Schcer. Licit. I He. p. ."><>. 



//. Mm; — Sphceria epigcea, Pers. Syn. Fung* App. />. 27. — 

 Lichen terrains, E. Bot. t. 1681. 

 On dry barren lank-, mar Norwich, Rev. G. A". Leatkes. 



<>. Endo< Irpon. //<</ir. Bndocarpon. 



ThaUus crustaceous, often Lobed or foliaceous. Apotliecia 

 globose, imbedded in the thailus, with a slightly prominent apex 

 and including a nucleus. — Name within, and «*£**] tin' 



fruit, from the situation of the fructification. The limits of this 

 jrenui are nol well understood, nor it- situation among the 

 Lichens. It we consider the nature of die apothecia, it will 



