III, 3. DIE STEINKOHLENFLORA VON RADNITZ IN BÖHMEN. 51 



Psaronius Cotta. 



Trunci arborei erecti cylindrici vel angnlosi, extus cicatricibus foliorum spiraliter dispositis 

 oblongis vel squamis crassiusculis ornati et plerumque Strato radicularum adventivarum crasso 

 tecti. Cortex crassa duriuscula. Cylindrus lignosus multiplex, fascieulis lignosis equitan- 

 tibus vel spiraliter dispositis, vel irregulariter per medullam dissipatis sectioni transversali 

 fasciaeformibus, nudis vel vagina propria cinctis, absque radiis medullär Ums. Vasa ampla 

 angulata scalariformia. Medulla saepius parca. Radices numerosae intertextae e cylindro 

 lignoso oriundae et per corticem aliquamdiu descendentes , fasciculo vasorum centrali stellato 

 vel angulato parenchymate cincto. Folia et fructus latent. Arbores plerumque giganteae 

 altitudine circ. 14 — 30 ped., habitu et vegetatione filicum arborescentium. 

 Cotta, Dendrol. p. 26, Taf. 4, 5. — Unger, 1. c. p. 4. — Corda, 1. c. p. 94. 



Psaronius carbonifer Corda. 



Corda, Beiträge zur Flora der Vorwelt, p. 94, Taf. 28, Fig. i— 4. 



P. trunco tereti, cylindrico ; medulla ampla; fascieulis vasorum lignosis equitantibus, latere ineurvis, 

 radieibus minutis intertextis. 



In arenaceo lithanthracum ad Wranowitz et ad Swina prope Radnitz. 



Psaronius musaeformis Corda. 



Corda, Beiträge zur Flora der Vorwelt, p. 94, Taf. 45, Fig. 3. 



P. trunco teretiusculo nudo, fascieulis lignosis latissimis, tenuissimis, subequitantibus , margine 

 incrassatis. 



Scitaminites musaeformis Sternb., Vers. I, Fase. 4, p. 20, 30, Taf. 5, Fig. 2 a, b. 

 Cromiodendron radnicense Sternb., Vers. II, p. 193. 

 In schisto lithanthracum ad Radnitz. 



Psaronius arenaceus Corda. 



Corda, Beiträge zur Flora der Vorwelt, p. 95, Taf. 28, Fig. 5 — 9. 



P. subcompressus, nudus, extus cicatricibus foliorum oblongis tetraslichis ornatus; fascieulis lignosis 

 latis, vaginalis, tenuissimis ; vasis scalariformibus minutis. 

 In arenaceo lithanthracum ad Chomle prope Radnitz. 



Psaronius pulchcr Corda. 



Corda, Beiträge zur Flora der Vorwelt, p. 96, Taf. 29, 30, Fig. 1—4. 



P. trunco arboreo, Strato radicularum tenui involuto ; medulla amjyla ; fascieulis lignosis latissimis 

 lenuibus subequitantibus , margine inflexis vaginalis; radiculis minutis. 



In arenaceo lithanthracum ad Chomle prope Radnitz. 



7 . 



