232 



liKRNT I.VNGK. M.-X. Kl. 



is criislicd, Uh- iiil( lior piiii oI'iIk iiM(iull;i t'i<(niciitly remains with the axis, 

 tile cxtcrioi" pait with llic cortex. 



The axillary iiyphae of I '. fnii^ilcscciis are entirely con/i^lutinate. But 

 /iiic chlorioiclc after .some tiiTie dissolves their cementinj:^ substance; leaving- 

 the lupliac (lisci-ete, they are thinner tlian on<' nii^hl ha\<; v\\)(c\i-(\ (2.5-4 I-*-)- 

 ']"he cortical hyphae are not isolated by this method, to study them add 

 KOI I, heat, crush the section, neutralize, and add J or zinr cloriodide 

 (Schwendenek's method). The same is the case with ('.Jloridn. 



Owing- to the fragile cortex the stem and branches of U.fragilescetis 

 are easily broken, and at sharp angles, other I 'si/rar are much more elastic, 

 they are bent like a bow before breaking. 



6. Usnea hirta (L.). 



Øsff. Fredriksstad: Oren IB. L.I. Akrrsli. Heland: Skullerud (B. L.l, 

 Kristiania (M. N. Bl., Moe et alii), Eidsvoll: V'ilbergshaga (SøR.), Minne 

 (B. L.). Busk. Vikersund (Moe), Norderhov (Norm.), Kongsberg (B. L.l. 



Aitstagd. Arendal (IL), Sætesdal: Jordal (SøR.). Rog. Egersund (H.l. 



Hord. f\ina: Stend (ll.), Alversund (H.), Bergen: Levstakken (H.l, Os 

 (B. L.), Strandebarm: Havn (Lillef.), Granvin: Nesheim (H.). Møre. 

 Molde (H.). 



Hed. Solor: Jesaasvand (B. L.). Opl. Lillehammer (Jebe), Ringebu 

 (SoMRFT.), Vinstra (Jebe), Lalm (B. L.); Gran (Jebe), Brandbu (B. L.). 



Nordtr. Levanger (Norm.). 



We are as yet unable to state its accurate distribution in Norway. 

 Ustiea hirta is frequent on w^ood-fences in Southern Norway, it also occurs 

 on Pimis. It is less common in Western Norway. It is chiefly a lowland plant, 

 but it ascends towards the tree line (to the 'sæter' (mountain pasture) region); 

 it is supposed to be rare north of the Do\re mountains. Sommerfelt does 

 not mention it from Saltdalen, and I was unable to find it in Troms. 



Apothecia have not been recorded from Norway. 



7. Usnea longissima Ach. 



Akersh. Aker: Bogstadaasen (M. N. Bl.), \'ættakollen (H.), Bomveien 

 (B. L.), and Grefsenaasen (Moe); Nordmarken: Elkollen (B. L.). /Vi^//. Hoff: 

 Rødsjø (Barth), Larvik: Slemdal (Norm.), and Hedrum (Høeg). Busk. 

 Krokskogen (B. L.), Humledal (Lagerstedt), Sylling: Enger (B. L.), Sokne- 

 dalen: Verme (Berner), Snarum: Ramfosmoen (B. L.),. Modums Finmark 

 (Moe). 



Tcleiii. Litjell (Hoch). 



Opl. Land (Horbye). 



