568 Hyphomjccteae, Muceiiineae. Helicosporoe, Helicomyces . 



Ilab. in Fumagine pannosa parasitica ad folia yiva Per- 

 nettise rnucronat.TB in Staten island in Fuegia. — A Tr. sub- 

 iili Rees an satis distinctura ? 



TIT>EA Sacc. Syll. IV, p. 231. 



1. Titffla Clarke» Ell. et Ev. Proc. Acad. Phil. 1891, p. 8^5. — Cfe- 7326 

 spitulis puiictiformibus v. elongatis, 0,5-1 mm. long., albis, adpres- 

 sis ; conidiis hyalinis deuse gregariis, quadrilocularibus, loculis bi- 

 nis verticaliter superimpositis, superiore globoso-ellipsoideo 7-9 is.. 

 diam., inferiori subovato angustiore, utrinquc appendice curvula di- 

 varicata cuspidata 10-45 a. long. prope basim biconstricta 4 p.. cr. 

 aucto, ba.«idiip e strato cellulari assurgentibus, monosporis, 15-25 

 V 3, quater v. quinquies constrictis. 



Hab. parasitica in Dichsena strumosa ad Quercura ili- 

 cifoliam, Vineland N. J. Amer. bor. (Domina C. H. Clarke). 



DESMIDIOSPORA Thaxt. Bot. Gaz. 1891, p. 203 (Etym. Besmidium 

 et spora). — Hyphai hyaUna^ raraosa^, septata3. Cooidia dimorpha, 

 in eodem mycelio. Microconidia minuta, subfusoidea, hyalina, in 

 apice basidii lateraiis subulati basi inHati acrogena. Macroconi- 

 dia majusGula, terminalia, appianata subdisciformia, peripberice sub- 

 dichotome iohata, intus raultilocularia, rufo-brunnea. — Genus 

 praedistinctum. 



L Dssmidiospora myrmecophfia Thaxt. loc, cit. t. XX, f. 1-9. — 7327 

 Effusa, flocculosa, alba; hyphis valde ramosis.; microconidiis fusoi- 

 deis 12^2-2,5; macroconidiis initio ciavatis dein sensim dilatatis, 

 demum discoideis inaequaliter multilocularibus 80-100 « 68-90, 12- 

 14 ij.. cr. (e latere), radiatim lobatis, rufo-brunneis, lobis 15-24 

 varias profunditatis, apice rotundatis. 



Hab. in corpore For mics cujusdara majoris, Connecticut Ame- 

 ricae borealis. 



Sect. 5. Helicospora) Sacc. 

 HELICOMYCES Link — Sacc. Syll. IV, p. 233. 



1. Hellcomyces? larvaeformis Speg. Guar. I, pag. 158. — Subiculo 7328 

 latissime effuso, crassiuscule pulvinato, 0,5-1 mra. cr,. gossypino- 

 V. arachnoideo-pulverulento, friabilissimo, amcene pallideque carneo 

 vel subaurantio-roseo; hyphis non visis; conidiis ferri equini in- 

 star arcuatis v. annulato-incurvis fusoideis, antice attenuatis, po- 



