Uiediuales, PncciniacesB, Puccinieae, Ravenelia. 793 



p. 157. — Est Hemileja teleutosporis biloculaiMbns. 



Huc pertiuet sec. v. Hobuel Stigmina Thermopsidis Harku. 



RAVENELIA Berk. ~ Syll. VII p. 770, IX p. 318, XI p. 210, XIV 

 p. 303, XVI p. 323, XVII p. 403, XXI p. 735. 



1. Ravenelia escharoides H. et P. Syd., Auu. Mycol. X, 1912, p. 440, 2790 

 Sydow. Ured. 111 p. 241. — Uredosoris epipbyllis, subepidermicis, 



in greges 1-3 inuj. latos couceutrice dispositis, miuutis, vix 0,5 mui. 

 diam., pulverulentis, i^allide ferrngiueis, epidermide rnpta ciuctis ; 

 uredosporis ellipsoideis v. ovatis, breviter echinulatis v. ecbinulato- 

 verruculosis, pallide flavo-brnnueis, 17-22 * 14-17, episporio 1,5 [x 

 cr., i)oris germ. uumerosis sparsis iustructis; parapbysibus nullis; 

 teleutosoris sparsis, minutis atris; capitulis teleutosporarum leuiter 

 couvexis, ambitu orbicularibus v. suborbicularibus, 55-90 \s. diam., 

 ex 6-8 sporis iu omni directioue compositis, flavo-bruuneis, sporis 

 omnibus papillis 4-9 verruciformibus 1-2 |ji altis obsitis, sporis sin- 

 gulis continuis, 30-35 ^ 16-20, ad apicem usque 6 [jl incrassatis ; 

 cystidiis eodem uumero quo sporis margiualibus, in aqua intume- 

 scentibus ; pedicello hyalino, brevi, composito, deciduo. 



Rab. iu foliis A c a c i a e B u r k e i, Piet Potgieters Eiist, Trau- 

 svaal, Africa austr. (J. Burtt Davy). 



2. Ravenelia inquirenda Arth. et Holway iu Arthur, Amer. Journ. of 2791 

 Bot., 5., 1918, p. 423. — Uredosoris amphigenis, sparsis v. subgre- 

 gariis, rotuudatis, 0,1-0,3 mm. diam.. diu tectis, subepidermicis, 

 l^oro minuto apertis, dein pulveraceis, cinnamomeo-brunneis, epi- 

 dermide rupta ciuctis ; paraphysibus intermixtis, cylindraceisV. 

 clavato-capitatis 26-42^7-10, tuuica ciuuamomeo-brunnea, uuifor- 

 miter 0,6 |j. cr. ; vu-edosporis ellipsoideis v. obovatis, 23-29*15-18; 

 tunica ciunamomeo-bruunea, 1,5-2 (i cr., moderate echinulata, poris 



4 aequatorialibus praedita; teleutosoris et teleutosporis iguotis. 



Hah. iu foliis Acaciae bursariae, Lagiina, Lake Ama- 

 titlau Guatemala, Amer. centr. (Holway). — Status uredospor. di- 

 stinctus et tunc verisimiliter diversa ab aliis Baveneliae speciebus. 

 Rav. gracili videtur proxima. 



3. RaveneliaTliornberiana W.H.Loug, Bot.Gazette, LXl p. 420(1917). — 2792 

 Pycuidiis ignotis ; uredosoris amphigenis, caulicolis et fructicolis, 

 saepius deformautibus, sparsis vel couflueutibus, irregulariter or- 

 bicularibus vel ellipsoideis, in caulibus etiam oblongis, minutis, 

 0,2-0,5 mm. diam., subcuticularibus, mox nudatis, ciuuamomeo-brun- 

 neis ; paraphysibus copiosis sporis intermixtis e clavato subcapi- 



