W 4.NALES DR LA SOCIEDAD CIENTÍFICA ARGENTINA 



44. POLYPORÜS? (Apus) LUDEINS Speg. (n. sp.) 



Di'a^'. Pilei dimidiatc-expiuisi (3.-5 cent. diam. — 2-3 cent. lat. 

 ant.-post.) postice tnmcati v. cuneati non v. parcissiine deciir- 

 renti-t'lTusi, teinii-membraiiacei, rigidi, siipra applanati, longi- 

 tudinaliter undulati, non v. obsoleie concentiice zonati, fuisco- 

 canescentes, adpresse minutissimeque pruiíiiilosi, periphaerice 

 manifestius, ac ibi saepe obsoletissime subviolasoenti-sulcati, 

 margine recto v. leniter incurvo, glabrato, subsericeo-nitente, 

 tenuissimo acntissimoque, minute liinc inde fisso; caro fusce- 

 scens, compacta, fibrosa, teuuis (0,3-0,4 mllm. crass.), tenax, 

 rigidula; hymenium fuscescens v. umbrinnm, postice sub irpi- 

 coideura, antice irregulariter evanescenti-porosum, zona raargi- 

 nali sterili, fibrosa (1 mllm. lat.) limitatum; pori vix impi*essi, 

 dissepimentis, posticis elongatis (0,5-0,8 mlím. long.), anticis 

 fere ullis, irregulariter lacerato-irpicoideis, acie acuta integra 

 V. lacérate- erosa, tenuibus, interstitiis strictissimis. 



Species Polyporo pergameneo Klotzsch nec non P. pseudo- 

 pergameneo Thüm., affiíiis, sed speciminibus comparatis plañe 

 distinctus, an melius Polyporum sectorem Fr. accedens? Hyme- 

 nii natura autem ad genera Dedaleam Pers. v. Irpicem Fr. ver- 

 gens. 



Hab. Ad truncos cariosos prope Guarapianin. 1880 (sub num. 3395). 



45. POLYPORUS (Apus) TABACINUS MntgnPrrFr. Epicr. Syst. Myc. 

 p. 480. 



Hab. Ad truncos atque palos fabrefactns prope Paraguarí et Gua- 

 rapi, per ann. 1880-83 (sub num. 3911-3397.) 



Obs. Pileus coriaceo-membranaceus, tenuis, rigidulus, flabellato- 

 T. dimidiato-expansus, applanato-convexulus, margine acuto, 

 integro, incurvulo, postice cuneatus, v. truncatus, non v. parce 

 decurrenti-effusus, supeune rufescenti-tabacinus v. ciunamo- 

 meo-ferrugineus, dense concéntrico siilcato-zonatus, zonis tu- 

 midulis, velutino-tomeotosis ; contextu tenuissimo (0,15 mllm. 

 crass.), fibroso, cute floccosa (zonas tumidulas, 0,5-2 mllm. 

 crass. efficiens) tecto ; hymenium pallide grisescenti-cinna- 

 momeum, tubulis peraegre sed regulariter a pileo secedenti- 

 bus, eoque pallidioribus, subtlaccidulis, deorsum curti (1.5-1,7 

 mllm. long.), gradatim m;irg¡nem versus abbreviatis ac eva- 

 nescentes, zona sterili nulla v. vix perspicua, ore minntis in 

 marginalibus subregularibus, rotundato-angulatis, (200-250 



