44 BERNT LYNGE. M.-N. Kl. 



specimen examined) containing crystals of oxa- 

 late of lime. Paraphyses capitato-incrassate, 

 frequently branched towards the apices. Spores 

 straight or fabiform, only imperceptibly con- 

 stricted at the septum, a little longer than in 



Fig. 6.' Physcia tenella > the ^ ' 14-5-22,4/1 long, 6, 5 -IO, 5 / thick. 



var. icptalea (Ach.). Reaction as in the type. 



Hab. On the bark of deciduous trees, especially on Populus tremula 

 and Sorbus Aucuparia. 



Loc. Evidently a southern plant, rare and dispersed in Norway, 

 perhaps more frequent in Western than in Eastern Norway: Hoi in 

 Hallingdal (LYNGE), Sogndalsstranden (HAVAAS), Moster and Granvin 

 (HAVAAS and LYNGE). 



I have never seen the Parmelia leptalea of ACHARIUS, but it evidently 

 represents a plant with adpressed laciniae provided with long, marginal, 

 spreading cilia. In Methodus the leptalea is separated from the tenella 

 by the laciniae which in the former are apice numquam fornicato-tubu- 

 losae. In Lich Univ. the laciniae are described as primo adpressae. 

 ACHARIUS cites JACQ. Coll. 4, Tab. 6, f. a. b. c. as a synonym, which 

 delineates an adpressed plant, the laciniae, are, however, broader and 

 coarser than in our plants. 



The tenella of ACHARIUS is no doubt identical with the ascendens of 

 BITTER : laciniis apice adscendentibus tubuloso-fornicatis. (Methodus p. 250), 

 as is also the Lichen hispidus of WULFEN (JACQ. Coll. IV tab. VI, fig. d, 

 excellent figure). WULFEN considers the erect or ascendent laciniae as 

 stages of age, the laciniae are in orbem quidem undique procumbentes, 

 . . . cum tempore etiam cucullato-semitubulosi . . . vagisque libere ascen- 

 dentibus & erectis. (1. c. p. 248). WULFEN cites Lichen tenellus SCOP. 

 Flora Carniolica as a synonym of his Lichen hispidus. If this is correct, 

 Lichen tenellus SCOP, must be a collective name, not identical with Physcia 

 tenella (Scop.) BITTER. 



In Synopsis p. 425 NYLANDER has var. i (of Physcia stellaris] lep- 

 talea (AcH. Meth. p. 198) with laciniis discretis, adpressis, margine fibril- 

 loso-ciliatis, and var. 2 tenella NYL. (syn. Lichen tenellus SCOP. Carn. p. 

 1406): subsimilis leptaleae minori, at fere effusa, laciniis adscendentibus 

 apice saepe fornicatis. NYLANDER'S tenella is evidently the same as BITTER'S 

 Ph. tenella -h Ph. ascendens. 



