Isotachia. franz snaMiAM. speciks iiepaticarum (V01..VI, 1922) 



Hab. Eciiador (Allioni legit). 

 64. Isolaehis pallens Sl. n. sp. 



Dioica mediocris flaccida, pallide virens, in cortice caespitans. 

 Caiilis ad 25 mm. longus, simplex vel pauciramosus, ramis elon- 

 gatis vulgo aggregatis. Folia caulina contigua, oblique patula, 

 conduplicatim concava, in plano subrotunda (3mm. longa et lata) 

 subsymmetrica, brevi basi inserta, apice ad 1/3 biloba, sinu recto 

 obtuso, lobis late triangulatis apiculatis, lobo antico integerrimo, 

 postico remote bivel tridentato. Cellulx superae 18xl8{i., basales 

 18x54(x parietibus validis, cuticula aspera. Amphigastria caulina 

 rotunda (2,5 mm. longa et lata) utrinque remote valideque triden- 

 tata, ad medium biloba, lobis triangulatis, sinu semirecto obtuso 

 integerrimo. Perianthia cylindrica (4 mm. longa, 1,5 mm. lata) ore 

 contracto, minute denseque ciliato. Folia floralia caulinis aequima- 

 gna, apice irregulariter triloba, lobo antico lanceolato acuto, pro- 

 funde soluto, lobis posticis triplo brevioribus, omnibus regulariter 

 denticulatis. Amphigastrium florale foliis floralibus subaequima- 

 gnum late ovatum (3,5 mm." longum, medio 2, 5 mm. latum) fere 

 ad medium bifidum, sinu subrecto obtuso, laciniis anguste trian- 

 gulatis, extus regulariter dentatis, in sinu levibus. Androecia 

 desunt. 



Hab. Chiloe (Skottsberg legit). 



65. Isotaehis paueidens St. n. sp. 



Dioica major, rufo-fusca, rigidula, in cortice laxe csespitans. 

 Caulis ad 35 mm. longus, sub flore innovatus, haud aliter ramosus. 

 Folia caulina contigua, squarrose patula, conduplicatim concava, 

 in plano late ovata, asymmetrica (1,5 mm. longa, medio 1,17 mm. 

 lata) margine antico quam posticus multo longiore et magis arcuato, 

 brevi basi inserta, utrinque cordatim ampliata, apice breviter 

 exciso-biloba, segmentis triangulatis remote minuteque pauciden- 

 tatis. Cellulx superae 21 x21 \i, basales 18x54{z trigonis majuscu- 

 lis. Amphigastria caulina triangularia (1 mm. longa, basi 0,83 mm. 

 lata) circumcirca irregulariter remoteque dentata et angulata, 

 sinuatim inserta, basi utrinque cordatim ampliata, rotundata 

 minute irregulariterque denticulata, apice multo angustiore, ad 

 1/4 inciso-bilobato, lobis late triangulatis acutis, extus pauciden- 

 tatis. Folia et amphigastria floralia caulinis simillima, parum 

 majora. Reliqua desunt. 



