168 DiscomycotiT», Patollarincprp, H\'alo3porsD, Actinoscypha. 



ascis aparaphysatis, octosporis; sporidiis ellipsoideis, continuis, 

 hyalinis, 12-15*0-8; gelatina hymenrea jodo vinose rubescenti. 



Ilah. in areis dealbatis truncorum Laricis in Scotia. — A 

 PlacograpTia incerta (Mass.) forte non satis diversa, observante cl. 

 E.ehmio. 



PSILOTHECIUM Clemonts in Bull. of the Torr. Bot. Cl. 1903, p. 85 (nec 

 Fuck. quod ~ Stagonospora v. Rhahdospora) (Etym. psilos tenuis, 

 thecium pro apothecio). — Ascomata superficialia, sessilia, ceraceo- 

 coriacea, cupulato-hemisph;i;rica, nuda, nigra, minuta; epithecium 

 nullum vel obsolescens; paraphyses lineares simplices, hyaHn;i'. 

 Discus seu hymenium Iseticolor; hypothecium plectenchymaticum, 

 crassum, pallide fuscum; excipulum carbonaceum, crassum, gla- 

 brum vel tuberculatum, brunneo-nigrum, margine libero incurvo. 

 Asci octospori, clavati, jodo non tincti ; sporidia continua, hyali- 

 na, elliptica, levia. — Patinellie affinis, sed dififert paraphysibus 

 simplicibus, epithecio nullo hymenioque l;i'ticoIore. 



1. Psiiothecium incurvum Clem. 1. c. p. 86. — Ascomatibus superficia- 3750 

 libus, sessilibus, gregariis, ceraceo-coriaceis, oblongato-hemisphajri- 

 cis 400-700 « 300-400; hymenio pallide brunneo v. isabellino, 125 

 [j.. alt., paraphysibus linearibus, simplicibus, superne vix v. haud 

 iucrassatis, hyalinis, 2 [jl. lat. ; hypothecio plectenchymatico, pallide 

 isabellino 125 [j.. alt. ; excipulo isabellino, sub micr. nigro-carbo- 

 naceo, cellulis 6-8 \i. diam., extus crebre minuteque tuberculatis, 

 infra 50 [x. cr., margine libero, incurvo 25 [j.. cr. ; ascis octosporis, 

 clavatis, stipitatis, jodo non tinctis, 70-80 «10; sporidiis recte v. 

 oblique monostichis, ellipticis, hyalinis, levibus. 8-9 ^ 4. 



Hdb. ad ligiium udum decorticatumque Salicis chlorophyl- 

 Ise, Placer, in montibus Sangre de Christo Amer. bor. 



ACTINOSCYPHA Karst. — Syll. VIII p. 774. 



1. Actinoscypha atopa Rehm in Hedw. XLIV, p. 8 (1904). — Asco- '?r,~A 

 matibus ad marginem macularum in hypophyllo late distributarum, 

 albarum, orbicularium, tenuissime parenchymatice contextarum, 0,5- 

 1,5 mm. lat., rarissimo confluentium singularibus, interdum 2-3 

 congregate sessilibus, primitus globoso-clausis, mox patellaribus, 

 disco plano tenuiter marginato, fuscis, in sicco nigris, excipulo gla- 

 bro, parenchymatico crasse contexto, hypothecio fuscidulo, 200- 

 300 |J.. diam., ceraceis; ascis clavatis, apice rotundatis, 50-70* 10- 

 12, 8-sporis ; sporidiis ellipsoideis, 1-collularibus, episporio utroque 



