Dr. E. Stizenberger on the Saxicolar Species of Opegrapha. 437 
XLVII.—Notule Lichenologice. No. VI. 
By the Rev. W. A. Lritcuton, B.A., F.L.S. 
Dr. ERNst St1zENBERGER, of Constance (Baden), Germany, has 
kindly sent me a copy of his valuable paper on the saxicolar 
species of Opegrapha, illustrated with two plates containing 
about two hundred figures of spores, &c., which has recently 
appeared in vol. xxxu. of the Transactions of the Academy 
Nature Curiosorum at Dresden. As this paper contains so 
much that is interesting to British lichenists, a ‘“‘ Conspectus,” 
which appears in the ‘ Flora’ of Feb. 22, 1865, is here given. 
Conspectus specierum saxicolarum generis Opegraphe. Auctore 
E. Stizenberger, Med. Dre. 
A. Species saxicolz, sporis 6-plurilocularibus. 
1. Opegrapha farinosa (Hmpe.), Hepp. 
O. rupestris B. farinosa, Hmpe. 
Thallus rimoso-areolatus, flavo-griseus. Apothecia primum immersa, 
rotundata, denique paulum emersa, oblonga, plerumque simplicia 
(1-1°5 millim. longa, 0°3-0°5 millim. lata), nigra; epithecio e 
rimiformi plano, margine primum rotundato, deinde angustato vel 
obliterato. Hymenium (50-60 mik. altum) hyalinum, in hypo- 
thecio dilute fusco, e paraphysibus discretis et ascis clavatis (50- 
55 mik. longis, 10-14 mik. latis) compositum. Sporze 8"®, crasse 
aciculares, rectee vel curvulee, 5—7- (raro 3-) septatee, hyaline 
(20-28 mik. longze, 2-3 mik. crassee). Hymenium tinctura iodii 
fulvescens. Spermogonia non reperta. 
In rupibus ad Blankenburg (Hercyniz), leg. Dr. E. Hampe. 
2. Opegrapha vulgata f. lithyrga, Ach. 
O. lithyrga, Hepp., Korb. (incl. 8. grisea). O. vulgata, wv. lithyrga et 
steriza, Nyl. Scand. Exs. Fw. 83; Zw. 1 as, 3. 354; Hepp. 348; 
Korb. 138; Krypt. Bad. 302. 
Thallus tenuis, subdeterminatus, farinaceus, sordide griseus vel cine- 
reo-viridis v. albus v. ochraceus, interdum deficiens. Apothecia 
sessilia, plerumque anguste linearia recta vel flexuosa (1-2°5 mil- 
lim. longa, 0°1-0°2 millim. lata), simplicia vel divaricato- raris- 
sime radiato-ramosa vel conglobato-difformia nigra; epithecio rimi- 
formi, ztate paulum dilatato, margine tumido, rotundato. Hy- 
menium (60 mik. altum) in hypothecio nigro, hyalinum, e para- 
physibus distinetis et ascis clavatis (40-55 mik. longis, 14 mik. 
latis) compositum. Spore 8"*, fusiformes vel bacillares vel cla- 
vatee rectze vel curvulee, 5—7-septatee, hyalinee (20-28 mik. longee, 
3, raro 4—5 mik. crassze). Hymenium tinctura iodii vinose rubes- 
cens. Spermogonia globosa, alba, apice denigrata. Spermatia 
cylindrica, recta vel curvula (4-5 mik. longa, 1 mik. crassa). 
In rupibus schistosis, granitaceis, gneisiacis, porphyricis, arenaceis, 
