— 456 — 



HYDNEAE Fr. 



138. Hydnum flavum Brk. — Sacc, 1. c. f. 456. 



Hab. Ad truncos ramos caudicesque putrescentes in sylvis 

 prope Apiahy, per anii. 1881-88 (sine n. et sub n. 2889). 



Obs. Species pulcherrima a genere Hijdno facillime sepa- 

 randa ac melius Hymenochaeti adscribenda, sat varia- 

 bilis; formae nobiliores haec 3 seqiientes: 



a) Pilei coriaceo-membranacei, in sicco rigiduli, dimidiato- 

 flabellati (5-20"' dm.) subcucullato-convexuli, postice 

 cnneati non marginati laevissimi; contextus sordidealbo- 

 pallescens compactos tennis (0,5'" crass.); hymenium e 

 pallescente lutescens aculéis cylindraceo-conoidei (150- 

 200 X 50-60 M-), laxiusculis pallide subferrugineis ápice 

 sfacelatis atque pallidioribns vestitum, 



b) Pilei tenues coriacei, rigidi in sicco, ex orbiculari reni- 

 formes subcucullato-convexuli ('40-50'" dm.) postice 

 emarginati, stipité brevissimo vix evoluto peltato-dilatato 

 (5-10'" It.) adfixi, margine integri cristula tenuissima 

 acuta strictissima vix perspicua aucti, fulvo-ruíescentes, 

 unicolores, glaberrimi laevissimi ; contextus albus com- 

 pactus subtenuis (1'" crs.) ; hymenium ex albo pallescens 

 aculéis obscure ferrugineis, cylindraceo-conoideis (200- 

 250 X 40-45 y) subconí'ertiusculis ápice integris acutissi- 

 mis vestitum. 



c) Pilei tenuiter membranacei, e rigidulo flacciduli, dimi- 

 diato-suborbiculares, cucullato-subgaleati (90-100'" dm. 

 trans. X 60-80'" dm. ant.-post.) postice profunde cor- 

 (lato-sinuati marginati stipite párvulo brevissimo tuber- 



.culiformi subdorsali adíixi, ambitu integri v. vix subre- 

 panduli, e lutescente sordide pallideque fulvescentes, li- 

 turis radiantibus fuscescentibus ramulosis saepe anasto- 



