LOBARIA.] 8TICTEI. 273 



Huh. On the trunks of old tretvs and on mossy rocks in maritime and 

 mountainous districts. — Distr. Si-cn only in a characteristic stat" from 

 S.W. Kn<rland, X. Wales, the S. and W. (-Sraiupians, Scotland. — B. M. : 

 Bryer Ishmd, Scilly, Cornwall; Bettws-y-Copd, JJeubi<rhsliire. Inverary 

 and Barcaldine, Argyleshire ; Glen Lochay, Pertksiiire ; by Loch Linnhe, 

 In\erness-shire. 



Form 2. aggregata Cromb. Grevillea, xv. (1877) p. 70. — Thallus 

 with cejjhalodioid tubercles, either simple or small and aggregate, 

 testaceous or s(;mewhat dark. — Sficta pulmonarea var. (ujfjrerjala 

 Del. Stict. (182.5) p. 12:3, t. 17. f. (52. 



Differs from the stute pkurocarpa in bearing, not apothecia, but peculiar 

 tubercles, which are rarely present on the under surface of the thallus. 



Hah. On the trunks of old oaks in wooded mountainous districts. — 

 Distr. Found only in the S.W. Highl mds, Scotland. —B. M. : Inverary, 

 Aro-vleshire. 



47. STICTA Sehreb. in Linn. Gen. PI. ed. 8, ii. (1791) p. 768 ; 

 Nyl. Syn. i. (1860) p. 351 ; Flora, 187-5, pp. 30.3, 303.— Thallus 

 lobate or laciniate, often more or less sorediiferous, beneath with 

 simple rhizinfB (/7«':;')Av^>7in«>), cyphellate or pseudocyphellate ; goni- 

 dial layer consisting of gonidia. Apothecia lecanoroid or parmeleine, 

 with variously septate spores. Spermogones as in the preceding 

 genera. 



Distinguished from Loharia by the thallus being cyphellate beneath 

 and not scrobiculose abive. From the character of the apothecia it mav, 

 like Sfktina, be divided into two subgenera, viz. Emtida and Parmosticta, 

 the former with lecanoriue and the latter with parmeleine apothecia. 

 Nearly all the species are exotic, but one seen nowhere else in Eiu-ope 

 occurs in Great Britain. 



Subgenus EUSTICTA Cromb. Grevillea, xv. (1887) p. 76.— 

 Thallus beneath cyphellate or pseudocyphellate. Apothecia leca- 

 noroid. 



a. Cyphellatip. — ThaUus cyphellate beneath, the cyphellae 

 thelotremoid or urceolate. 



1. S. damaecomis Xyl. form latior Cromb; Grevillea, xv. (1887) 

 p. 76. — Thallus expanded, smooth, slightly shining, laciniate, pale 

 brownish-red ; beneath tomentose, dark brown, paler at the circum- 

 ference ; lobes somewhat broadly dilated, sinuate, dichotomous and 

 retuso-truncate at the apices. Apothecia moderate, chiefly marginal, 

 reddish-brown, the margin entire or obsoletely crenulate : spores 

 fusiform, 1-3-septate, 0,026-36 mm. long, 0,008-11 mm. thick. — 

 Sticta damcecornis a. macropliifUa Mudd, Man. p. 89 ; Cromb. Lien. 

 Jirit. p. 32 ; Leight. Lich. Fl. p. 119. ed. 3, p. 112. St'uta macro- 

 phylla Hook, in Sm. Eiig. Fl. v. p. 205 ; Tayl. in Mack. Fl. Hib. ii. 

 p. 150 ; Eorr. in Eng. Bot. Suppl. t. 2697. — The specitic name 

 iiuicrojjhylla, having been previously given by Delise (1825) to an 



X 



