G20 Uredineac, Didymosporae, Puccinia. 



tis, suborbicularibus, atris, subpulverulentis, primo tectis, dein epi- 

 dermide fissa ciiictis, 1-3 mm.d. ; uredosporis teleutosporis immixtjp. 

 ovoideis vel subpiriformibus, crassiuscule tunicatis, 20-22 s lo-l^. 

 muriculato-asperulis, prrecipue in parte superiore, fulvo-flavescen- 

 tibus; teleutosporis ellipticis, medio uuiseptatis, vix constrictis, 

 episporio robusto apice crasso et in mucronem obtusum pelluci- 

 dum producto, subopace atro-fuligineis, loculis subffiqualibus, gra- 

 nuloso-farctis, 55-60 c; 25-28, hyalino-asperulis (?), pedicello hyali- 

 no, apice infuscato, basi incrassato, 120-130:^5-10 suff^ultis. 



Hab.'u\ foliis vivis Ipomere purpureffi et raegapotamiae 

 pr. la Roca el Riachuelo et Cordoba in Republica Argentina nec 

 non Jacq ue m n tiffi cujusdam ad Kenbebry (Spegazzini), Arae- 

 ricae australis. — Exeraplaria e Cordoba praebent teleutosporas epi- 

 sporio pulchre ac laxe rugoso-verrucoso. Adest forraa aecidio- 

 spora ex regione Guaranitica ita descripta ab auctore Speg. Fun- 

 gi Guaranitici 1, n. 155: maculis nullis vel vix raanifestis, expal- 

 lentibus, indeterrainatis; pseudoperidiis hinc inde compactiusculis 

 4-15 aggregatis, hypophyllis, raembranaceis contextu parenchy- 

 matico-lorlcato e cellulis ex elliptico obtusissime hexagonis, 15-20 

 s 13-15, crasse tunicatis, grosse radiatiraque rugosis hyalinis com- 

 posito; nccidiosporis ellipticis ssepe e rautua pressione angulosis, 

 18-20 =: 13-lC, crassiuscule tunicatis episporio dense at rainutissi- 

 rno papuloso-asperulo, subhyalinis. In foliis vivis Ipomea3 cujus- 

 dara in dumetis prope Guarapi. 



42. Puccinia mirabiiissima Peck in Botan. Gazette 1881, pag. 22i' 

 Tracy et Gall. in Botan. Gazette 1888, p. 12G. — Alaculis I»te pur 

 pureis 3-4 mni. diam., leniter incrassatulis, pseudoperidiis Iiypoge- 

 nis, longis, pallide flavis, margine grosse laceratis; a^cidiosporis 

 subglobosis, 15-20 y.. diam., tuberculatis; maculis parvls, puncfi- 

 formibus vel majusculis subrotundisque, superne atris vel atro- 

 brunneis; soris hypophyllis, paucis, minutis, pallide rufescenti- 

 brunneis; uredosporis subglobosis, obovatis vel piriformibus, obtu- 

 sis, minutissime rugulosis, 22-.33 =; 20-23, pedicello hj^alino, deiri 

 deciduo; teleutosporis immixtis, ellipticis, obtusis, ad septum con- 

 strictis, subtiliter rugosis, 30-32 c; 22-25, pedicello longissimo hya- 

 lino fultis. 



Ilab. iu foliis vivis languidisve Berberidis repentis, Utah 

 Americne borealis (Jones). — Pedicelli teleutospora) 2-3-plo lon- 

 gioros ; sori in maculis usque ad G insidentes. 



4.'. Puccinia afra Wintor in Medwigia 1887, p. 30. — Pseudoperi- 21 



m 



