I9l6. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 6l 



Ex sic. NORRL. et NYL. Herbarium Lichenum Fenniae no. 218 (1882, 

 s. n. Physcia constipata). 



TH. FRIES referred his specimens to Anaptychia ciliaris y humilis 

 KBR. Parerga p. i9. They do not, however, agree with KOERBER Lich. 

 Sel. Germ. no. 102, which is a Physcia muscigena, but with NORRL. et 

 NYL. No. 218. NYLANDER proposed his constipata as a variety in 

 1873, as a species in 1882. 



Thallus moderate or large, 6 10 cm., very fragile. Laciniae as- 

 cendent or erect, closely imbricate or even panniform, but usually free 

 at their apices; they are thin and narrow, lacerato-incise at their 

 apices. Colour greyish or greyish-brown, under side ofthe 

 same colour or entirely uncoloured. Laciniae smooth, without isidia 

 or soredia, epruinose or (nearly imperceptibly) pruinose at their apices (strong 

 lens). There are some scattered, pale or nearly uncoloured rhizinae along 

 the margin of the laciniae, and very few on the under side. 



Upper cortex plectenchymatous, uncoloured, 2530,1* thick, hyphae 

 distinct, pellucid, constrictedly septate with rounded articuli. Gonidia ar- 

 ranged in a very regular stratum under the upper cortex, also in scat- 

 tered glomeruli within the lower cortex. Lower cortex u ncoloured 

 or only pale brown about the rhizinae, on erect free laciniae distinctly 

 marked out from the medulla, plectenchymatous, and built as the 

 upper cortex, on closely imbricate laciniae only locally plectenchymatous, 

 usually gradually transformed into the medulla, and with hyphae parallel 

 to the surface. 



Apothecia not seen. 



Pycnides with a prominent ostiolum, globose, diam. 130 i6o. Peri- 

 fulcrium uncoloured or of a pale brown colour, darker at the ostiolum. 

 Pycnoconidia broadly cylindrical with rounded apices, 3,5 4.11 long. 



Reaction: Cortex and medulla uncoloured by KOH as well as by 

 CaCl 2 O 2 . 



Loc. Central Norway: Gudbrandsdalen between 0ien and Kleivstad, 

 Northern : Storviksnesset in Alten and Aid in Varanger (Tn. FRIES s. n. Physcia 

 pulverulenta (SCHREB.) NYL. y humilis (KBR.) NYL. The specimens pre- 

 served in the botanical museum of Upsala. 



I have never seen it in nature, but the pale colour, narrow, lacerate, 

 usually epruinose laciniae with marginal rhizinae entitle it to a specific 



