802 Uretlinales, Pucciniacea:, Pucciniese, Ravenelia. 



Aiiier. bor. — Ob zonam liyaliuam aeqnatorialem ureflosporarum 

 perdistincta species. 



24. Ravenella Mainsiana Artli. et Holw. in Arthur, Amer. Journ. of 2813 

 Bot. V, 1918, p. 426. — Uredosoris ampliigenis, si^arsis, ovatis, 0,2- 



0,8 111111. long. mox nndis, pulveraceis, cinnamomeo-brunneis, epi- 

 dermide rupta cinctis ; parapbysibus intermixtis, clavatis v. capi- 

 tatis, 29-45 «^ 7-16, tunica leniter colorata, uniformiter 0,5-1 \i. cr. 

 pedicello flrmo ; uredosporis ellipsoideis v. late obovatis, 18-23* 

 16-18; tunicH cinnamomeo-brunnea, 1,5-2 [ji cr. moderate ecbinulata, 

 poris parum distinctis, 8-10, sparsis ; teleutosporis ampbigenis, 

 sparsis v. in parvos greges disposjtis, rotnudatis v. ovatis, 0,4-0,8 

 nim. cr., subepidermicis, mox uudis, nigricantibus, epidermide rnpta 

 cinctis; teleutosporis irregubiribus depressis obscnre castaneo-brun- 

 neis, 3-6 cellis levibns, 55-71 * 74-93, sporis singulis 7-9 spinulis 

 usque 3 [jl long. praeditis ; cysti infra pedicello inserta. 



Hah. iu foliis M i m o s a e a 1 b i d a e , Gnatemala U., America 

 centr. (Holway). — A Eav. Mimosae-alhidae Diet. pbiribns notis 

 diversa. 



25. Ravenelia Morongiae W. H. Long, Bot. Gazette LXI p. 418 (1916).— 28i4 

 Pycnidiis ignotis ; uredosoris ampbigeuis et caulicolis, perennanti- 

 bus, saepe defoimantibns, sparsis vel confluentibus, interdnm cir- 

 ciuatis, subcuticularibns, mox nudatis, pallide cinnamomeo-brunneis, 

 pulverulentis; parapbysibns copiosis sporis intermixtis vel in soris 

 propriis, forma et magnitudine bulibundis, e clavato subcapitatis 



vel vesiculosis, 40-60 * 12-20, capite 20-25 * 12-20, membrana tenui, 

 1 [3. cr., apice ad 3 \s. incrassata, prope apicem e pallide fnlvis ciu- 

 nainomeo-brnnueis, ceternm subliyalinis, stipite byalino, flrmnlo, 

 22-30 V- 2-4, iuterdum colbipsis ; nredosporis late ovoideis vel sub- 

 globosis, 15-20* 14-18, episporio fnlvo 1,5-2 n cr. deuse verrucoso- 

 spiuuloso, concolori, poris germ. 8-12 sparsis praedito; telentosoris 

 bypopbylbs, minutis, sparsis, inconspicuis, irregulariter ovatis, ni- | 



gricantibns, nitentibns pnlveruleutis; capitubs teleutosporarum ca- 

 staneo-brunueis, sursum valde convexis, 50-70 p. diam., e celbilis 

 6-12 periphericis compositis, levibus; cystis pancis, deuse adpressis 

 iu iuferiore parte cai)itnlornm, iu aqua leute intiautibns; pedicello 

 brevissimo, byaliuo, decidno. 



Hah. in foliis et ramuHs M o r o n g i a e u n c i n a t a e, Austin, 

 Texas, Amer. bor. 



26. Ravenelia vitis Syd., Ann. Mycol. 1916, p. 68. — Uredosoris am- 281S 

 phigenis, sparsis, minutissimis, vix visibilibus, dilute ferrngineis. 



