rr.ATTSMA.] CrrRAKIKI. 'J-J[ 



from the precedinpr in tho narrower laciniie, connivent at the marp'ms, 

 and wlien fertile in the position of the apothecia. With na it is sterile. 



Ilnh. On the ground umono- mosses in alpine places.— Z>/s/r. Known 

 only from tho summits of some of the higlier \. Grampians, Scotland. 

 — B. M. : Cairutoul and Oairngorm, I»raemar, Aberdeimsliire. 



b. Thallus suliascending or appressed, more or less closely 

 adherent, subdiscolorous ; Jacinise somewhat narrow. 



3. P. saepincola Xyl. Act. Soc. Linn. IJord. sen 3, i. (185G) 

 p. 295. — Thallus sniall, smooth, laciniato-lobed, olive- or chestnut- 

 brown, beneath paler ; laciniju decumbent or aseendin*, somewhat 

 plane, the margins undulato-sinuate or crenate (K~, CaCl~). 

 Apothecia submarginal, adnate, small or moderate, dark-brown or 

 subconcolorous, shining, the margin thin, crenate ; spores ellipsoid 

 0,OU6-10 mm. long, (i.0(»5-G mm. thick. — Cromb. Lich. Brit. p. 2(J 

 pro parte; Leight. Lich. Fl. p. luO pro parte, ed. 3, p. 9-1 pro parte. 

 — Lichen sfrpiiH-ola Ehrh. Phyt. (ITbO) n. 90 ; Eng. Eot. t. 2386. 

 f. 2. — To this, from specimens in herbaria, is not referable the 

 Lichen or Cetraria sepincola of other British authors, which refers 

 to the following species. 



A small plant, with the thallus rosulate,pulvinate, or sometimes effuse, 

 and generally smaller when fertile than when birren. The small and 

 crowded apothecia are rare in this country, as also the spermogones, 

 which have the sperniatia 0,000 mm. long, scarcely 0,001 mm. thick. 



Hah. On old pales and branches of trees, mostly tirs, in mountainous 

 disti-icts. — Dixtr. ^'ery local and scarce, in the X. Grampians, Scotland ; 

 very doubtfully in N. England. — B. M. : 'r Teesdale, Durham. Glen 

 Quoich and Glen Dee, Braemar, Aberdeenshire. 



4. P. ulophyllum Xyl. Flora, 1S60, p. 442.— Thallus moderate, 

 smooth or isidio-furfuraceous, lacero-laciuiate, greyish- or pale chest- 

 nv;t-brown, beneath paler ; laciniae subappressed or ascending, some- 

 what narrow, variously di\-ided, the margins uudulato-crisp and 



white sorediato-pulverulent (K~, CaCl.~). Apothecia submarginal, 

 small, the margin subcrenulate or entire ; spores as in the preceding 

 species. — Cromb. Grevillea, xii. p. 75. — Platysma srppincola var. 

 vJophi/llum Leight. Lich. Fl. p. lOO, ed. 3, p. 95. Cetraria sepin- 

 cola j). rdophi/II a Ach. Meth. (LS03) p. 297. Cetraria Sfppincohi 

 Gray, Xat. Arr. i. p. 432 ; Hook. Fl. Scot. ii. p. 57 ; Sm. Eng. Fl. 

 V. p. 220 ; Mudd, Man. p. 80. Lichen sepincola Dicks. Crvpt. fasc. 

 iii. p. 18 ; With. Arr. ed. 3. i. v. p. 73 : Eng. Bot. t. 2386. f. 1.— 

 Brit. Exs.: Leight. n. 45; Mudd, nos. 55, 56. 



From P. scepincola. of which it has generally been regarded a varietv, 

 this is distinguished by the longer and broader, sometimes isidio-furfu- 

 raceous lacinife, which when fully developed are somewhat flaccid, and 

 by their crisp sorediate margins. The states by which it has been sup- 

 posed to be connected with the preceding are merely young and non- 

 isidiiferous conditions of this plant. The small apothecia have only once 

 been met with in this country rightly developed. 



