iS8 ARKIV FÖR BOTANIK. BAND 8. N:0 4. 



Trib. 8. Buellieae. 



]. Physcia. 



1. Ph. caesia (Hoffm.) Nyl., Prodr. Lieh. Gall. Alg. 

 (Bull. Sog. Linn. Bord. XXI, 1857) p. 308, Syn. Lieh. I (1858— 

 60) p. 426, Enum. Lieh. Fret. Behr. (1888) p. 27, 48, 86; Th. 

 Fr., Lieh. Aret. (1860) p. 64, Lieh. Spitsb. (1867) p. 13, Lieh. 

 Scand. (1871) p. 140, On Lieh. Engl. Pol. Exp. (Journ. Linn. 

 Soc. Bot. XVII, 1879) p. 354; Stizenb., Verz. Now. Semlj. 

 Lieh. (1872) p. 420; Almqu., Lieh. laktt. Sib. (1879) p. 38, 

 39, 43, 49, 50, 51, Lieh. Kust. Beringsm. (1887) p. 525; Tuck., 

 Syn. North Am. (1882) p. 76; Deiehm. Branth et Groenl., 

 Groenl. Lieh. -Fl. (1888) p. 472; Wain., Exp. Antaret. Beige 

 Lieh. (1903) p. 24. Lichen caesius Hoffm., Enum. Lieh. (1784) 

 p. 65 (eonf. Wain., Rev. Lieh. Hoffm., 1886, p. 15). 



Ad saxa gneissaeea et granitiea in insula Idlidlja et in 

 peninsula Jinretlen. Ster. — Thallus subtus pallidus, rhizinis 

 eoneoloribus aut cinerascentibus . 



F. torrida Wain. 



Thallus subtus nigricans, rhizinis eoneoloribus, soraliis 

 supra laminam thalli sparsis, KHO superne et intus lutescens. 



Ad saxa granitiea in insula Idlidlja. Ster. 



Obs. Ph. caesia f. melops (Duf.) Wain., thallo sorediis 

 destituto, subtus pallido aut pr. p. obscurato, rhizinis eoneo- 

 loribus dignota, in f. vulgarem, sorediatam transit. In Ph. me- 

 lopse (Duf.) Nyl., Fl. 1874p. 16, Lieh. Paris (1896) p. 42, Enum. 

 Lieh. Fret. Behr. (1888) p. 27, 48, 86 (n. 32279 in herb. Nyl.), 

 secundum annotationem Nylanderi in sehed. speeiminis orig. 

 (n. 32276, qui est fragmentum speeiminis in herb. Aeh. asser- 

 vati et a Duf. lecti) thallus KHO superne et intus reagens, spo- 

 rae long. 0,016 — 0,020, crass. 0,008 — 0,oio millim. Hue etiam 

 pertinet f. esorediata in Wain., Lieh. Caueas. (1899) p. 300. — 

 Ph. caesia f. subalhinea (Nyl.) Wain. {Ph. subalbinea Nyl., 

 Fl. 1874 p. 306) secundum specim. orig. (n. 32271 in herb. 

 Nyl.) thallo ambitum versus adscendente, superne parcissime 

 soredioso, subtus paUido differt et supra museos crescit. N. 

 32270, a Lojka in Transsylvania leetus, hue non pertinet. — 



2. Ph. stellaris (L.) Nyl., Prodr. Lieh. Gall. Alg. (1857) 

 p. 307. 



*Ph. tribacia (Aeh.) Wain., Adj. Lieh. Lapp. I (1881) 

 p. 135, Lieh. Caucas. (1899) p. 300, Exp. Antaret. Beige 



