Stromatopogon, eine neue Flechtengattung. 



Beschrieben von 



Br. A. Zahlbruckner. 



Mit einer Tafel (Nr. II). 



1 hallus fruticLiIosLis, teres, undique similaris, ramosus, basi parce incrassata sub- 

 strato affixus; Stratum corticale chondroicieum; pars strati medullaris exterior myelo- 

 hyphica et arachnoidea, pars centralis solida et chondroidea; gonidia protococcoidea. 

 Apothecia in stromatibus pleurocarpicis subglobosis, axillaribus vel rarius terminalibus 

 sita, globosa, primuni clausa et stromatibus inclusa, demum erumpentia et vertice lace- 

 ratim dehiscentia; perithecio nigro; hypothecio non evoluto. Paraphyses laxae, flaccidae. 

 Asci mox evanescentes. Sporae 6— 8-nae, demum nigricantes, biloculares. Receptacula 

 pycnoconidiorum et stylosporarum apotheciis similia et iis in stromatibus immixta. 

 Sterigmata plerumque simplicia, rarius apicem versus breviter 2 — 3-ramosa. Pycno- 

 conidia subcylindrica, medio levissime angustata. Stvlosporae cuneatae, pluricellulares. 



Stromatopogon Baldwini. 



Thallus pendulus aut subpendulus, rigidiusculus, teres, scabridiusculus, mediocris, 

 8 — 14 cm. altus et i — 1-2 mm. crassus, basi transverse ruptus, ferrugineo-rubescens vel 

 ferrugineo-flavescens, K — , Ca Gl — , KCaCl — , sat dense dichotome et sympodialiter 

 ramosus, ramis (saepe dense) sulphureo-sorediosis, ultimis subulatis incurvis et hinc 

 inde ad apicem breviter et patenter fibrillosis. Gonidia viridia, g — 13^ in diam. Stro- 

 mata saepe glomerosa, primum monocarpica, dein poly- (12 — 3o) carpica, thallo dilu- 

 toria, rubescenti-flavida, vel (saepius) dilute flavida, laevia, 0-5 — 2 mm. in diam. Apo- 

 thecia i3o — 150a in diam., perithecio mediocri, carbonaceo. Paraphyses ramosae, 

 ascis longiores. Asci ovato-subcylindrica, 40 — 44^1^ longi et 8 — 10 jtt lati. Sporae ovales 

 vel ovali-subcuneatae, medio parum constrictae, cellulis parum inaequalibus, 18 — 20 |U 

 longi et 5-3 — 6-5 jt( lati. Receptacula pycnoconidiorum et stylosporarum apotheciis 

 paulum minora, go — ii0|tt in diam. Sterigmata 20 — 26 jU alta; pycnoconidia 5*3 — 7 ju. 

 longa et o-8 — i fx lata. Stylosporae oblongo-cuneatae, e cellulis basalibus uniserialibus 

 2 — 3 et e cellula terminali majore, simplice vel transversim (hinc inde oblique) septata 

 compositae, 22 — 25 ^a altae et (apice) 7 — g (< latae. 



Ad truncos arborum in parte orientali insulae Sandwicensium Maui, 5000' s. m. 

 (Baldwin, Lieh. Sandwic, Nr. i a). 



Im anatomischen Bau des Lagers, in der Art der Verzweigung, in der Anheftungs- 

 weise an die Unterlage schliesst sich die vorliegende Pflanze enge an die Gattung Usnea 



Aiiiialeu des k. k. naturliistorischeu Hotmuseums, Bd. XII, Heft 2, 1897. J'-' 



