776 Discomycetfe, Pezizaceae. Hyalosporee, Pirotta&a. 



ascomatibus dense gregariis v. per corticis linias seriatim erum- 

 pentibus, udis orbicularibus, circiter 2 mm. diam.-, murinis, disco 

 convexo, margine leniter incurvato, contextu cariioso, ceiluioso, 

 vei^us marginem hyphis olivace.is septatis rectis, circiter 75 p., 

 longis, apice 3-4 /y. crassis insertis; ascis clavato-cylindraceis, 70- 

 7B *:« 8-10, breve stipitatis, octosporis; sporidiis oblique monostichis, 

 . ellipticis, hyalinis, S-11 « 5-6; paraphysibus simplicibuR, HUpra sub- 

 undulatis, circiter 2 ^j.. crassis. 



IJab. in ramis emortuis Bigelovi;e graveoleutis, Colo- 

 rado Amer. bor. 



PIROTT/EA Sacc. — Syll. VIII, p. 386, X, p. 19. 



1. PirottaBa setulosa (Mass. et Crossl.) Sacc. Hedw. 1895, p. XXX^VI, 2912 

 Ediinella setulosa Mass. et Crossl. British Fungi IV, p. 305. — 

 .Ascomatibus sparsis v. gregariis, sessilibus, primo olausis sphaericis, 

 dein planis, soepe irregularibus, margine leviter incurvato, undulato, 



1 mm. diam. ; disco griseo, interdum pallide rosaceo, extus atro- 

 olivaceo, margine albido, setuloso; excipulo ex hypliis hyalinis valde 

 intricatis circiter 4 p. crassis composito; contextu distinctc paren- 

 chymatico, basim versus cellulis irregnlariter .polygonalibus sub- 

 olivaceis, 8-10 p. ad margiuem in pilis leviter clavatis plervimque 

 continuis pallidis excurrentibus, pilis nonnullis superfioiem exte- 

 riorem tegentibus; ascis anguste clavatis, apice punctiformibus, 

 pedicello firmo siepe curvulis, octosporis; sporidiis parallele fasci- 

 culato-dispositis, hyalinis, elongatis. anguste cylindraceo-fusoideis, 

 plerumque curvulis, maturitate 38-45 v 2 '/^-S ; paraphysibus sub- 

 firmis, hyalinis, cylindraceis, circiter 3 ^. crassis. 



ifa&. in ramulis decorticatis Callunae vulgaris in Britannia. 

 — G-enus Echinella et quia jam usurpatum et quia supra typitm 

 primarium Pirottcece exstructum, non accipiendum. 



2. Plroltaea Crosslandi (Mass.) Sacc. Hedw. 1895, p. XXXVI, EcM- 2913 

 nella Crosslandi Mas.s. British Fung. IV, p. 306. — Ascomatibus 

 gregariis v. interdum subconfertis, sessilibus, basi angustatis, initio 

 clausis, deiu explanatis, margine plus minus erecto,'eirciter 1 mm. 

 diam., disco pftUido, extus pallide brunneo, sicco pallide luteolo- 

 griseo, danse villoso, pilis cylindraceis, obtusis, miuute asperulis, 

 70-125 V 4-5, erectis, non v. vix soptatis, luteo-brunneis, apice 

 paHidiovi>)us; contextu ;>arenchy\natico, cellali,'-: irroc-ulariter poly- 

 goualibus, 5-6 u. diam.; ascis oylindraceo-clavatis, apic'; leviter 

 angiistatis, octosporis; sporidiis irregulariter distichis, ievibus, hya- 



