Ustilaginese, Dictyosporse, Doassansia. 503 



Species, suadente cl. Schroeter, valde aHines et characteribus matricis • 

 plcrumque distinguenda?. 



1. Doassansia Alismatis (Nees) Cornu Sur quelques Ustilaginees nou« is-i2 

 velles ou peu connus in Ann. Scienc. Nat, Ser. VI, tom. XV, (1883), 



p. 285, tab. XVI, f. 1-4, Schroet. Pilztl. Scliles. p. 286, De -Toni 

 ilevis. of Doassansia in Journ. of Mycol. 1888, p. 14, Sclerotium 

 Alismatis Nees in Fr. Syst. inycol. vol. II, p. 257 (1822), Feri- 

 sporiithi Alismaiis Fr. Syst. Myc. III, p. 252, Dothidea Alisma' 

 tis Lasch in Rabenh. Herb. mycol. I edit. n. 55:3 et II edit. n. 

 162, Uredo Alisraacearum Crouan Flor. Finist. p. 8? Eniyloma 

 Aiismacearum Sacc. in .Michelia II, p. 44, n. 4o4, Mori Funghi 

 di Modeua n. 14, Proiomyces macularis Fuck. in Thiim. Mycoth. 

 Univ. n. 1417 non Sacc. in Michelia I, p. 13 {= Physoderma ma- 

 culare Wallr.). — Soris ampliigenis, pustuliformibus, brunneis, 

 usque ad 300 y.. diam. metientibus, utrinque prominulis, rotunda- 

 tis vel ellipsoideis, rarius irregularibus, numerosis, in maculis ut 

 plurimum determinatis, orbicularibus, 4-10 mm. longis, raro sub- 

 coufluentibus circinatim dispositis; sporis sphffiroideis vel ovoideis 

 obtuseque angulatis, 10-14 (rarius 18) := 8-11 y.. episporio tenui, 

 levi, dilute briinneo doaatis, plasmate pallido subhjalino foctis, te- 

 gumento communi beue evoluto, obscure brunneo; sporidiolis lon 

 ge cylindraceis, numerosis ad apicem promycelii evolutis. 



llab. in foliis Alismatis Plautaginis in Italia, Gallia, 

 Germania, Suecia, Finlaudia nec non Sibiria occidentali et Ameri- 

 ca boreali, socio soepe CylindrospOi^io Alii^raaccarum Sacc, quo- 

 cum metagenetice connexa videtur. Cfr. Sacc. Syll. Fung. vol. III 

 {SpJuvropsidecc ei Melanconiece) p. 740, n. 3805. 



2. Doassansia Sagittariae (West.) Fisch. in Berichto Deutsch. botan. is4.3 

 Gesellsch. II, p. 405 (1884), Winter et Demetrio Deitr. Pilzfl. Mis- 

 souri ser. 1, n. 1, Briard. Champ. nouv. Aube n. 29, Schroet. Pilzfl. 

 Schles. p. 286, De-Toni Revis. of Doassansia in Journ. of Mycol. 

 1888, p. 15, Uredo Sa[/itia)'i(C 'We^t. Crypt. belg. n. llll, Physo- 

 derma Sagiitariic Fuck. Fungi rhenani n. 1549, Protomyces Sa- 

 giltariic Fuck. Symb. mycol. p. 75, Froiomyccs Bizzozerianus 

 Sacc. in Michelia I, p. 97, Fungi italici f. 103, Entyloma Bizzo- 

 zerianum Sacc. in Michelia II, p. 135, Speg. Fungi Argentini, 

 pugillus quartus p. 21, n. 55. — Soris hypophyllis, pustuliformi- 

 bus, flavescenti-brunneis, usque ad 100 •/. diam. raetientibus, ple- 

 rumque rotundatis, numerosis, subinde confluentibus, in maculis 



