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DODGE-<strong><strong>LICHEN</strong>S</strong> <strong>AND</strong> <strong>LICHEN</strong> <strong>PARASITES</strong> P3<br />
Var. hymenins (Sch.) Fw. Besides the two preceding, Crombie reports it from Observatory<br />
Ray, A. E. Eaton (Jour. Linn. Soc. Bot., 15, 183; 1876. Phil. Trans. Roy. Soc. [London], 168,<br />
48; 1879) and from Marion Island, Moseley (Voy. "Challenger") in Jour. Linn. Soc. Rot., 16,<br />
222; 1878. Rept. Sci. Results Voy. "Challenger" Bot. 1, 2, 203; 1885.<br />
#<br />
Peltigem rzifescens (Weis) Humb. was reported by Bouly de Lesdain, Ann. Crypt. Exot.,<br />
4,100; 1931 from bay north of the isthmus at Port Jeanne d'Arc, Aubert de la Rue 6.<br />
Peltigora sczbtata (Diclis.) Dilbp was reported by Muller-Argan, Bot. Jahrb. [Engler] 334;<br />
1883 from Port Palliser, Betsy's Cove, Naumann (Voy. "Gazelle").<br />
Peltigem sptiria (Ach.) DC. Resides thc J. I). Hooker material mentioned above under<br />
P. vcqtosn, Crombie, Jom. Linn. Soc. Bot., 15, 183; 1876. Phil. Trans. Roy. Soc. [~ondd], 168,<br />
48; 1879, reports it from Swain's Ray, 8. k:. Eaton and Muller-Argau, Bot. Jahrb. [Engler] 3,<br />
54 ; 1883 reports it frorn Betsy's Cove, Naumann (Voy. "Gazelle ").<br />
Thallus crustose, simple or with effigurate margins, continuous, areolate to squamulose and<br />
dwarf fruticose (in Xphaerophoropsis), attached to the substrate by the hyphae of the hypothallus<br />
or of the medulla without differentiated rhizinae (except in Psora), often decorticate, ecorticate<br />
or with an incomplete cortex of fasciculate thiclr-walled hyphae, never pseudoparenchymatous;<br />
algal layer of Protococc~is, rarely producing many cells in a colony before the colonial wall clisappears;<br />
medulla loosely woven with the basal layer not differentiated or suggesting the structure<br />
of the upper cortex. Apothecia circular, sessile or rarely immersed, or with a very short<br />
stallr, parathecium hyaline or carbonaceous, not surrounded by an amphithecium nor including<br />
medullar tissue; paraphyses sornewhat branched but not conspicuously so nor anastornosing;<br />
asci ~lsl~ally 8-spored (less than 8 in Mykoblastus and Megalospora) or with 16-32 in a few<br />
species of Lecidea and Racidia; ascospores usually hyaline (becoming brown in Rhizocarpon)<br />
of a variable number of cells, with or without a gelified sheath. Spermogonia immersed;<br />
spermatia elongate-ellipsoidal to cylindrical, straight or lightly curved.<br />
Spores unicellular<br />
Spores thin-walled, under 25p long ... . . . . . . . . . . . . Lecidca<br />
Spores thick-walled, over 25p long . . . . ... . . . . . . My koblastus<br />
Spores 2-celled<br />
' Thallus ecorticate, uniform<br />
Parathecium and hypotheciom hyaline . . . . . . . . . . .. Biatorina<br />
Parathecium and often hypothecillm carbonaceous . . . . . . . . Catillaria<br />
Thallus corticate, verrucose to squamnlose . . . . . . . . . . Thalloidima<br />
,<br />
Spores 4- or more celled, fusiform to acicular<br />
Thallus ecorticate, uniform . . . . . . . . . . . . . . . . Bacidia<br />
Thallus corticate, verrucose to sqnamnlose . . . . . . . . . . . . Toninia<br />
Spores mnriform, usually brown at maturity with a. conspicuous sheath . . Rhizoc,arpon<br />
Lecidea Ach., Meth. Lich., 32; 1803.<br />
IJECIDEA Ach.<br />
Type : Acharius, in proposing the genus, treated 99 species in 4 subgenera, including species<br />
now in the Lecanoraceae as well as the Lecideaceae. The choice of a type may well be left to a<br />
monographer. Clements & Shear, Gen. Flung., 319; 1931, chose TI. enterolezbcn Ach., which was<br />
first described seven years after the genns was described!
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