124 



13. R. commutata Jack. (Plate II). 



B., Nw. (w. c, suba.). — Fær., frequent. On rocks and Lnrger stones, 

 from tlie sea-shore to the higher parts of the mountains. Only barren. 

 Syd.; St. Dimon; Sando; Vaago; Myggenæs; Str.; Nolso; Ost.; 

 Bor do. 



The Færoese 9 plaiits agrees exactly with the description and 

 figure in »Flora«, 1881 (Jack.: Die europaischen Radiila- Arien). 

 On the d" plant the growth of stem is continued, and the raniifi- 

 cation therefore more or less pinnate and bipinnate. The antheridia 

 occupy the apical part of the stem and the nppermost branches, 

 never forming long and narrow spikes as in R. Lindbergii and ger- 

 inana, and there is scarcely any difference in form and size between 

 the perigonial- and the other leaves. R. Lindbergii and R. germana 

 are not fonnd in the Fær. »Jiingennannia complanata L.« is recorded 

 by H. and T. Discoverers name not given. Specimens are wanting. 



14. Porella Thuja (Dicks.) Lindb., Madotheca Thnja Dnm. 



B., Nw. (w. c). — Fær., very rare. On exposed rocks. Ost.: Near 

 Ejde, Ijarren (!). 



15. P. rivularis (Nees) Lindb., Madolheca rivularis Nees. 



B., I., Nw. (w. c). — V-æv., Irequent. On nioisl rocks, from the sea 

 to the higher parts of the mountains. Only l)arren. Syd.; S t. Dimon; 

 Str.; Nolso; Ost.; N o r d r e 6 e r. 



Very variable in size and habit, colonr, density of the lufts. 

 Some small forms are not uncommon, the most extreme is: 



Var. færoénsis v. n. 



Tufls dense, opaque, deep-green oi- partly brownish-green ; planl 

 2 3 centim. long, gracile, irregnlarly pinnate, dense leaved, branches 

 obtnse; auricles half as broad as the stipules, decurrent, obtuse, or 

 acute, one or both margins recurved, entire; leaf-cells with Ihin 

 walls and distinct trigones at the angles, the interior fdled with 

 chlorophyll, upper cells 0,013 — 0,020 millim. broad, smaller than in 

 the typical form, where they are 0,020 — 0,032 millim. 



Fær., rare. On shady rocks. Syd.: Norbcs Ejde, barren (!). 



16. Pleurozia purpurea (Lightf.) Lindb. , Physiotinm cochleari- 

 forme Nees. 



B., Nw. (Atl.). — Fær., frequent. Moist or spong}- ground, amongst 

 other mosses, rare on stony ground (»Ur«) amongst Grimmia hypiioides, 

 from 50— 400 m. Only barren. Syd.; Sando; Vaago; Str.; Ost.; Bord 6. 



17. Lepidozia setacea (Web.) Mitt., Jungermania setacea Web. 



B , I., Nw. (w. c). — Fær., very rare. Spongy ground, amongst Sphog- 

 nuin, Campijlopus atrovlrens, etc. Str.: Glivursrejn, fr. (!). 



