508 A. HESSELBO 



213. Fontinalis thulensis C. Jensen (Bot. Tids. 20, p. 110). 



"Laxe caespitosa, sat robusta, mollis, sordide luteola, inferne nigres- 

 cens subnitida. Caulis usque ad 25 elm. longus, inferne plerumque 

 nudus, plus minusque ramosus, ramis brevibus vel elongatis, erecto- 

 patentibus, vel subsecundo-arcuatis, interdum acutis, cauli primario sat 

 similibus. Folia dimorpha, tristicha; folia caulina erecto-patentia vel 

 laxe imbricata, plus minusque distincta et recte carinata, interdum tantum 

 complicata, late ovata-lanceolata, longe decurrentia integra vel apice in- 

 distincte denticulata, adultiora subobtusa, juniora acuta, nunquam bi- 

 fida, superiora vulgo 56 mm. longa et 23 mm. lata, inferiora minora, 

 latere uno versus basim reflexo; folia ramulina minora et subangustiora, 

 vulgo 3 4 mm. longa et 1,5 2 mm. lata, inferiora multo minora omnia 

 ecarinata, valde concava, interdum complicata, erecto patentia, inferiora 

 ramorum arcuatorum arete imbricata, superiora interdum subsecunda. 

 Cellulae in media foliorum 0,0070,013 mm. latae, 812 plo longiores. 

 Alae basilares, planae, unistratae, e cellulis quadratis et hexagonis, aeque 

 ac ceteris cellulis basilaribus, luteis formatae. Cetera ignota. 



Speciei americana F. Kindbergii valde affinis. sed ramis erecto-pa- 

 tentibus, non pennatis, foliis eorum brevioribus et latioribus, cellulis 

 angustioribus, colore luteolo (F. Kindbergii ferrugineus est) et nitore 

 debiliore ." 



W. Iceland: The Laxa (Hjar&arholt), 21.7.1886 (Feddersen). 



Note. Fontinalis sqiiamosa L. is enumerated on older lists, but of 

 the specimens from Iceland, contained in the collections, some belong 

 to F. antipyretica, some to F. androgyna. 



214. Fontinalis androgyna R. Ruthe. 



W. Iceland: The Ellidara near Reykjavik (Morch; Grl.; H.J.;!). 



In the Ellidara it grew abundantly in company with F. antipyretica 



on large stones and rocks under water. There not only ^ buds were 



found, but also a few ripe capsules on the lowermost part of the stem 

 (5.8. 1909). 



FAM. 

 215. Leucodon sciuroides (L.) Schwgr. 



S. Iceland: Foss (H.J.)!; Drangshlid (H.J.;!); Stjornarsandur (H. J.)!; 

 Hrutafell!. SE. Iceland: Hornafjordur!; Hof!. SW. Iceland: Hafnar- 

 fjordur !. 



All the Iceland specimens belong to var. morensis (Schwagr.) de 

 Not. It grows on dry rock-walls with a southern exposure, both on 

 tuff and on basalt, and appears to be rather frequent from Hof in SE. 

 Iceland throughout S. Iceland to Hafnarfjordur in SW. Iceland. It occurred 

 abundantly on Hrutafell and Drangshlid, and covered the vertical faces 

 of tuff-rocks for long distances. Here it was also richly fruiting with 

 capsules which were partly ripe at the end of June. 



