24 



62. Arthronema: (cirrosum.) 



Trichomata abbreviata, intra vaginam concatenatim conjuncta. 



63. Arthrosiphon : (Gevillii.) 



Scytonematis trichoma vaginis amplissirais infundibuliformibus. 



64. Symphyosiphon : (hirsutus.) 



Trichomata vaginis lamellosis, basi fasciculatim coalita et lateraliter 



concreta. 



65. Porphyrosiphon : (Notarisii.) 



Trichomata scytonematica ; vagina e membranis pluribus composita, 

 externa in fibras discedens. 



