Thysaitaiilhui;. fhan/, stkpham. spkcies iiepaticaiu.m (Vol. IY, 1912). 



20. Thysananthus paucidens Sl. n. sp. 



Dioica, inediocris, iiifo-brunnea, riiiidiila, longe lateque stratificala. 

 (Jaalis ad G cm. longus, irregulariter longeque ramosus, ramis sa^^pe 

 unilateralibus. Folia caulina inibricata, subrecte patula, valde concava, 

 niargine postico arcte incurvo, in plano late ovata, subsymnietrica 

 (1,2(> mm. longa, 0,93 mm. lata\ apice late rotnndata, brevi basi 

 inserta, basi antica breviter rotundata, siiperne denticulata. Cellvlae. 

 superae 18X27 u. valida^ basales 27x3G «i trigonis magnis acutis. 

 Lobulus \\\ situ oblongus, in plano rectangulatus, duplo longior quam 

 latus, apice truncatus, augulo obtuso. Amphigaslria caulina majuscula, 

 caule quadruplo latiora, sinuatim inserta subrotunda. Perianthia pyri- 

 foi-mia, triplicata, plicis brevibus interjectis, irregulariter denticulata 

 ssppe erosula, rostro parvo. Folia floralia intima periantbio subduplo 

 breviora, lanceolata, acuta vel obtusa sparsim denticulata ; lobulo duplo 

 breviore ad medium soluto, lanceolato acuminato integro. Amphigas- 

 trium florale intimura foliis floralibus jequilongum, obovatum, superne 

 irregulariter denticulatum. Andrcecia in caule ramisque mediana, ])rac- 

 teis ad iO jugis. 



Hab. Hawai. 



21. Thysananthus polymorphus (Sande-Lac) St. 



Syn. : Phragmicoma polymorphu Sande-Lac, Syn. Hep. Jav., 1856, 

 p. 58. 



Dioica, mediocris, virens, valida rigidula, in cortice laxe caespitans. 

 Caulis ad 8 cm. longus, pauciramosus, ramis ad. i cm. longis, saepe 

 simplicibus, aliis pinnula auctis. Folia caulina parum imbricata, valde 

 concava, margine postico late incurvo, in plano late ovata, asymmetrica 

 (1,6 mm. longa, medio 1 ram. lata), brevi basi inserta, basi antica bre- 

 viter rotundata, margine supero nudo, infero regulariter denseque 

 dentato. Cellulse superae 18x18 [ji trigonis magnis, basales 18X36 ^ 

 trigonis maximis. Lobulus in situ occultus, in plano rectangulatus, 

 parvus, duplo longior quam latus, apice truncatus, angulo acuto, folio 

 quadruplo brevior. Amphigastria caulina raajuscula sinuatim inserta, 

 anguste decurrentia, alis ex parte liberis, pendulis, in plano subrotunda, 

 apice truncata, mamillatim dentata. Perianthia pyriformia, levia tri- 

 plicata, plicis interjectis numerosis, rostro parvo. Folia floralia intima 

 oblonga, perianthio parum breviora, acuta, irregulariter valideque den- 

 tata, infernenuda ; lobulo quadruplo breviore, rectangulato, baud soluto, 

 apice truncato, angulo obtuso. Amphigaslriutn tlorale intimum foliis 

 floralibus jequilongum, spathulatum, apice late emarginatum, lobi& 



793 



