Ustilaginacese, Ustilag-o. 475 



16. Ustiiago exigua Syd. Ann. Mycol. 1903, p. 177, Ustil. microspora 1602 

 Massee et Rodway in Kew Bull. 1901, p. 160, nec Schroet. et 

 Henn. — Soris, paniculas totas implectentibus easque in massam 

 pulveraceam transformantibus, obscure fulvis; sporis globosis 3- 



3,5 (jl. diam. vel subglobosis 3-4 « 2-2,5, glabris, dilute olivaceis. 

 Hab. in inflorescentia Danthonips penicillatse in Tasma- 

 nia (Rodway). 



17. Ustilago residua Clinton in Journ. of Mycol. 1902, p. 133. — 1603 

 Soris prominentibus, ovaria destruentibus interdumque vaginas 

 foliorum occupantibus, erumpentibus in massam olivaceo-nigram ; 

 sporis olivaceo-brunneis, ovoideis vel ovato-globosis vel irregulari- 

 bus, episporio tenui donatis, reticulatis verisimiliter e granulis con- 

 tentis, 5,5-8,5 ;x. diam., interdum usque 11 \i. longis. 



Hab. in innorescentia Danthoniae compressas N. Y., Dant. 

 spicatae N. Hamps., Danthonias spec, Colorado Amer. bor. 



18. Ustilago Tricuspidis Ell. et G-all. apud Clinton in Journ. of My- 1604 

 col. 1902, p. 135. — Soris ovaria destruentibus, ellipsoideis, circ. 



4 mm. longis ; sporis rufo-brunneis, subsphaericis v. globosis, raro 

 ovoideis, subverruculoso-echinulatis, 8-11 \i. longis. 



Hab. in ovariis Triodhe cuprese (Tricuspis seslerioides) 

 Montana Amer. bor. 



19. Ustilago heterogena P. Henn. Fungi Amaz. I, pag. 155 (Hedw. 1605 

 1904). — Soris versiformibus, culmos innorescentiasque implenti- 

 bus et deformantibus, atris, in culmis foliisque pustuliformibus 



vel pulvinatis oblongis usque ad 12 cm. longis, ca. 2 cm. crassis, 

 epidermide alutacea vel ferruginea vestitis, in floribus ca. 1-2 mm. 

 diam. ; sporis .... (diagnosis incompletaj. 



Hab. in culmis, inflorescentia et noribus Leptochlose virga- 

 tae, Rio Jurua, Bom Fim Amazonise — Habitu Ustilaginis Maydis 

 fere temula. 



20. Ustilago digitariicola Speg. Mycet. argent. ser. II, 1902, p. 57. 1606 

 — Gemmas foliares infectas, vaginis foliorum adultorum arcte 

 vestitas, in massam pulveraceam nigram fibris longitudinalibus 

 percursas, omnino transformans ; sporis ab initio liberis globosis 



v. e mutua pressione leniter obtuseque angulosis, subopacis, atro- 

 fuligineis, intus dense granulosis, 8-12 jx. diam., tenuiter tunicatis. 

 Hab. in Panico (Digitaria) sanguinali, La Plata Argen- 

 tinae. — Species difficillime in vivo perspicienda, post mortem 

 plantie hospitantis facilius invenienda. 



21. Ustilago diplospora E. et E. Journ. Myc. 1890 p. 119. — Massa 1607 



