(VOL.VI, l'.l:2;2) l-nANZSTKPIIAM. SPKCIKS HKPATir.AIU-M Isolucliis. 



remotiuscula, oblique patula, canaliculatim concava apiceque incur- 

 va, in plano lale ovata, optime symmetrica (2,5 mm. longa, medio 

 2 mm. lata) ad 1/4 emarginato bifida, rarius trifida, lobis late trian- 

 gulatis, acutis integerrimis. Cellulx superae 18 x 27 (j. trigonis majus- 

 culis, cuticula papillata, basales 18 x 54 u i)arielibiis validis, trigo- 

 nis majusculis, cuticula striolata. Amphiyaslria caulina folio omnino 

 aequalia, bifida. 



Hab. Bolivia (Herzog legit). 



51. Isotachis Allionii St n. sp. 



Dioica major purpurascens, in rupibus humidis csespitans. Caulis 

 ad 5 cm. longus, sparsim longeque ramosus, rigidulus. Folia caulina 

 imbricata, oblique patula, sa^pe homomalla, in plano ovato-elliptica 

 (2 mm. longa, medio 1,5 mm. lata) ad 1/3 inciso-biloba, lobis late 

 triangulatis, apiculatis. Cellulse superae 18 x 90 (x, basales 36 x 44(i. 

 trigonis nullis. Amphicjastria caulina magna (1,5 mm. longa, 0,83 

 mm. lata) ad medium emarginato-bifida, sinu latiusculo, laciniis 

 lanceolatis, cuspidatis, medio utrinque setula patula armato. 

 Perianihia (juvenilia) ore dense longeque setacea. Folia floralia 

 intima magna, subrolunda (5,5 mm. longa et lata) ad medium emar- 

 ginato-bifida, sinu amplissimo, laciniis late divergentibus trian- 

 gulatis, longe cuspidatis, marginibus ubique sparsim irregulari- 

 terque spinosis. Amphigastrium florale intimum ambitu obovatum 

 (4 mm. longum, 2 mm. latum) basi obcuneatum, ad 2/3 bifidum, 

 sinu obtuso, lobis lanceolatis cuspidatis, sparsim longeque setosis. 

 Androecia desunt. 



Hab. Ecuador (Allioni legit). 



52. Isotachis aspera St. n. sp. 



Sterilis mediocris, flavo-rufescens, in sicco brunneola, flaccida 

 laxe caespitans, terricola. Caulis ad 3 cm. longus, tenuis, debilis 

 pauciramosus. Folia caulina parum imbricata, recte patula, condu- 

 plicatim concava, lobo antico decurvo, postico porrecto, in plano 

 subrotunda (2 mm. longa et lata) oblique emarginata, biloba, lobis 

 late triangulatis acutis integerrimis. CelluUe superse 36 \i basales 

 36 x 63 [X, trigonis magnis, basin versus minoribus ; cuticula basalis 

 grosse striolata, apicalis papillata. Amphigastria caulina parva, 

 caule duplo latiora, appressa, ambitu reniformia, quadriloba, i. e. 

 ad medium emarginato-biloba, lobis triangulatis porrectis acutis, 

 lobis lateralibus recte patulis. 



350 



