The English flora - SeaweedAfrica

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190 L1CHENES. [Lecanora.
19. L. rubra, Ach. {red-shielded Elm Lecanora)', crust
leprous white thin uneven continuous, apotliecia numerous
sessile concave brownish-salmon-colour (or red) with a thick
elevated powdery crenate inflexed border. Sm.—Ach. Syn.
p. 177 Lichen Ulmi, Sw.—E. Bot. t. 2218.
On the bark of old Elms, Yorkshire, Mr. Borrer.
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20. L. H&matomma, Ach. (blood-specked Lecanora); crust
leproso-tartareous pulverulent white or pale sulphur-coloured
with a fibrous border, apotliecia imbedded scarlet concave, when
old convex, the border thick white elevated remarkably inflexed
mealy at length spreading.—Ach. Syn. p. 170.—Lichen Hcematomma,
Ehrh.—E. Bot. t. 486 Lichen coccineus, Dicks. Cr.
Lecanora Stonei,
Fasc. 1. p. 8. t. 2. /. 1. E. Bot t. 223.
Ach. Syn. p. 170.
Rocks and brick-walls, in various places. On Stonehenge, Wiltshire.
Salisbury Craigs, Edinburgh. On the large Cross at Iona.—The Lichen
coccineus of E. Bot. appears to be only an old state of the L. Hcematomma.
21. L. cerina, Ach. (waxy Lecanora); crust somewhat granulated
greyish-white, apotliecia scattered elevated flat at length
convex yellow waxy, the border inflexed somewhat pruinose.
Ach. Syn. p. 173. Lichen cerinus, Dicks, Cr. Fasc. 3. p. 14.
E. Bot. t. 627.
Trunks of trees, Norfolk and near London.
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22. L. crenuldta, (little crenated Lecanora); crust scattered
ash-coloured very thin, apotliecia minute dispersed brownish-
grey with an elevated crenated whitish margin. Sm.—Lichen
crenulatus, Dicks. Cr. Fasc. 3. p. 14. t. 1
9.f.
Lichen dispersus,
Ach. Prodr. (Sm.)—Lecanora galactina, /3. Ach. Syn. p. 187.
Limestone rocks, South of England.
23. L. byssi?ia, (mealy-bordered Lecanora); crust powdery
brownish, apotliecia flat dull yellow with a very white mealy
elevated border (when old double). Sm—Lichen byssinus,
Dicks. Cr. Fasc. 2. p. 19. E. Bot. t. 432.
On trees and stones, Scotland, Mr. Dickson. On brick, near London,
5m._Thi s and the preceding are, to me, very obscure plants. Acharius
seems inclined to refer the present to L. cerina, but the figure is very
unlike that species.
24. L. chloroleuca, Ach. (green and white Lecanora); crust
white leprous very thin, apothecia crowded elevated flat olivegreen
the border white undulated. Sm— Ach. Syn. p. 160.
—Lichen chloroleucus, E. Bot. t. 1373.
On mosses, in alpine countries.
25. L. vdria, Ach. (variable-shielded Lecanora); crust thin
granulated scattered pale yellowish-green, apotliecia crowded
flattish buff or brown the border waved irregular inflexed.
Sm.—Ach. Syn. p. 161. Lichen varius, Ach. Prodr.—Dicks.
E. Bot. t. 1666.
On old posts and pales. On rocks, Appin, Capt. Carmichael.
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