Isotachis. franz stepiiani. species hepaticarum (VoL.Vl, 1922) 



maxime stoloniferus, irregulariter multirBmosus. Folia caulina 

 contigua, oblique patula, conduplicatim concava, in plano renifor- 

 mia (2 mm. lata, 1,67 mm. longa) apice late rotundata vel subtrun- 

 cata, breviter quadriloba, lobis late triangulatis, apiculatis. Cellulse 

 superse 54 (x, basales 36 x 108 (x trigonis nullis, cuticula levis. 

 Amphigastria caulina parva, late ovalia (0,9 mm. longa, medio 0,75 

 mm. lata) apice valide irregulariterque quadridentata. Perianthia 

 maxima, fusiformia (7,5 mm. longa, 3 mm. lata) triplicata, ore con- 

 tracto, minute dentato et spinoso. Folia floralia exigua, perianthio 

 triplo breviora, conduplicatim concava, carina stricta, in plano 

 anguste elliptica (0,83 mm. longa, medio 1,85 mm. lata) apice ad 

 1/5 inciso-biloba, sinu subrecto, segmentis late triangulatis acutis 

 integerrimis. Amphigastrium florale late obovatum foliis floralibus 

 sequilongum, medio supero sexspinoso, spinis validis, superis lon- 

 gioribus. 



Hab. Fuegia (Skottsberg legit). 



59. Isotaehis grossidens St, n. sp. 



Sterilis mediocris, flavo-rufescens, flaccida, pulvinatim csespitans. 

 Caulis ad 25 mm. longus, tenuis simplex, rarius ramo elongato 

 auctus. Folia caulina contigua, oblique patula, canaliculatim concava 

 leviterque decurva, in plano subrotunda (2 mm. longa et lata) 

 brevissima basi inserta, ad 1/3 bifida, sinu recto obtuso, laciniis 

 late triangulatis acutis vel apiculatis, marginibus ceterum integris, 

 margine antico interdum remote bidentato. Cellulse superse 18 x 

 27 (x leves, basales 18 x72[x cuticula striolata. Amphigastria caulina 

 foliis sequimagna, subaequalia, marginibus inferis utrinque remote 

 bidentatis. 



Hab. Patagonia (Skottsberg legit). 



60. Isotaehis Halleana St. n. sp. 



Sterilis mediocris flavicans, flaccida, terricola et rupicola, pulvi- 

 natim csespitans. Caulis ad 2 cm. longus, simplex tenuis. Folia 

 caulina valde conferta, conduplicatim concava, in plano 2,17 mm. 

 longa, supra basin 1,75 mm. lata, basi antica valde ampliata, rotun- 

 data, caulem late superantia, margine postico substricto, basi bre- 

 viter rotundato, apice grosse triloba, lobo antico triangulato, acu- 

 minato acuto, lobis posticis multo minoribus, anguste triangulatis, 

 breviter solutis acutis. Amphigastria caulina ovato-triangulata 

 (1,5 mm. longa ,basi 1,17 mm. lata) basi breviter inserta utrinque 



8 octobre 1922 353 .23 



