SKANCE DU 10 MARS 187(). 85 



GciK LEGANORA Adi. 

 Sect. Caloplaca (Th. Fr.). 



Snbsect. Amphiloma (Koprb.). 



Lecanor.^^. sect. Placodium Ach., L. nniv. 42:2; Syn. 17V), e\cl. spec, 

 plerisque. — PLAcoDiof DC. FL Fr. TI, 377, excl. spec. — Parmklle 



spec. Fr. L. eur. — Physcle et Callopismatis spec. DN. Nuoc. Carat. 

 Parm.— Ampiulomatis spec. (Fr.) Koerb. Syst. 110. — Amphiloma (Fr.) 

 Ka3rb. Par erg. 47. 



1. L. elegans (Link). 



L 



L. thallo radiato, intense rubro-aurantiaco (K -f- P^^'P-)^ nuJo : laciniis dis- 

 cretis v. subdiscretis, dichotome divisis, loruloso-cylindricis rariusve deprossis, 

 substrate applicitis v. subadnatis ; apotheciis centripetis v. saepe sparsis, thallo 

 concoloribus, sessilibus, margine plerumque integro; paraphysibus apice (orii- 

 loso-c!avulalis; sporis elh'psoideis, 10-16x5-8 mm. (1) ; spermatiis oblon- 

 go-ellipsoideis oblongisve. — Hab. imprimis ad substrata silicea, rarius ad rupes 

 calcareas, rarissime ad ligna fabrefacta vetusta, 



Syn. — Lichen elegans Link, Ann. bot, 1794, p. 37. — Lecanora Ach. Vet, 

 Ak. Handl. 1810, p. 158 ; L. tmiv. 435; NyL Lapp. 126. — Placodium DC. FL 

 fr. 11,379; Xyl. Enum. Ill; L. Sc. 13G;Mudd. Man. 131; Leight. L. fJ. 17S; 

 Malbr. Cat. L. Nonn. 135. — Pannelia fv, L. eur. Hi; Schier. Enum. 51 ; 

 €xs. n. 338; Physcia DN. Nuov. carat. Parm. 2i; Mass. Monogr. Blast. 50; 

 exs. It. n. lOi ; Arn. in Flora, 1875, p. 151, t. v, f. 6 (sperm.). — Amphiloma 

 Koirb. Syst. 110; Mull. krg.Princip. *i9. — Aglaopisma ]\t{g\. Enum. L.Ligur. 

 26. — Caloplaca Th. Fr. L. Sc. 108. 



a. 



orbicularis (Schier. /. c). 



Thallus mediocris v. majusculus, lypice orbicularis, at sa^pe rosulis pluri- 

 bus confluentibus irregulariter expansus, laciniis lineari-cylindricis snbstrato 

 parum haBrenlibus. Apothecia saspius parca, contripeta. Spermalia oblongo- 



eJlipsoidea, 2-3 x 1-1^ n^^- 



subvar. confusa Wedd. : laciniis thalli ut in typo v. plus minus depressis 

 s. plano-convexis, absque ordine dispositis, centro nullo definito ; apothe- 

 ciis sparsis. 

 var. compacta (Arn.) NyJ. in Flora. 1872, p. 519. —Physcia Arn. Rettenstein, 



535. 



Thallus expansus s. subeffusus, laciniis abbreviatis, non aut vix radianli- 

 bus. Apolhecia numerosa, Ihallum pro maxime parte velantia. 

 .ar. tenuis (Wahlenb.) Nyl. L.Sc. 137; Th,iFr. /. c; Hepp, exs. n. 900. 



Thallus minor, laciniis ut in a radiatim dispositis, sed dimidio tenniorihus 

 et minus discretis. Spermalia anguste oblonga. 2-j-3 J X 1 nim. 

 subvar. discreta Seiner. Enum. 52; exs. n. 481 : laciniis thalli ut in pra^ce- 

 denle, at inordinatim sparsis. 



Obs. — Cette espece, la plus belle du genre, ne se montre avec fre- 



(1) C/csl-a-dire : 10-lG mm. long., 5^8 mm. bt. — Un niicromillimistre (mm.)'=»un 

 millieme de millimetre (millim.). 



