Uredinacece, RaYenelia. 743 



Hab. in foliis Mimosse albidae et M. albidce var. flori- 

 b u n d [e 5 Mexico. 



23. Ravenelia LeucaenaB-microphyllae Diet , Beih. Bot. Centralbl. XX 2812 

 Abt. II (1906) p. 375. — Pycnidiis ignotis; uredosporis teleuto- 

 sporis immixtis (paucis observatis) late ellipsoideis, tunica pallide 

 brunnea, tenui, minute echinulata, poris germinativis circ. 4 ;equa- 

 torialibus; teleutosoris epipbyllis, sparsis, parvis, 0,2-0,5 mm. dm., 

 subepidermicis, nigro-brunneis, nitidis; paraphysibus paucis, cy- 

 lindraceis subclavatis, 45-60 » 7-15, levibus, tunica tenui, supra 

 paullo crassiore et obscuriore; teleutosporis apice castaneo-brun- 

 neis, 70-100 u.. diam., 6-10-cellularibus, levibus; cystibus hyaliuis, 

 coh^erentibus, adpressis, udis disrumpentibus; pedicello hyalino 

 deciduo. 



Hdb. in foliis Leuc^eme microphyllse, Mexico. 



24. Ravenelia igualica Arth , North .\mer. Fl. VII (1907, p. 136.— 2813 

 Pycnidiis ignotis ; uredosoris plerumque hypophyllis, sparais, ro- 

 tundatis, parvis, 0,2-0,3 mm. diara.. subcuticularibus, mox nudis, 

 cinnamomeo-brunneis ; paraphysibus intermixtis, capitatis v. cla- 

 vato-capitatis, 35-50=^9-12, levibus, tunica apice 3-5 ;j.. incrassata 

 ceterum 1-1,5 ij.., firme stipitatis, supra brunneo-auratis infra pal- 

 lidioribus; uredosporis globosis v. late ellipsoideis, 16-19*14-16, 

 tunica paHide cinnamomea, 1 ;j.. circ. cr., minute echinulato-ver- 

 rucosa, 8-10 poris germinativis, sparsis prsedita; teleutosoris ple- 

 rumque hypophyllis, sparsis, irregularibus, parvis, 0,3-0,8 mm. 

 diam., subcuticularibus, mox nudis, nigro-brunneis, nitidis; para- 

 physibus nullis; teleutosporis apice castaneo bruuneis, 4-7-cellu- 

 laribus, 60-90 \i. diam., quaque spora 5-7 seriebus tuberculorum 

 subhyalinorum rotundatorum v. leniter acutatorum, 2-4 ;j.. ioug. 

 prreditis; cystibus pendentibus, hyalinis, ovoideis vel globoideis, 

 udis ex inflato disruptis; pedicello brevi, hyalino, dcciduo. 



Hdb. in foliis Acacire siliculoidis, Mexico. 



25. Ravenelia Acaciae-pennatulae Diet., Beih. Bot. Centralbl. XX, 28U 

 Abt. II (1906) p. 371 ; Arthur, North Amer. FI. VII (1907) p. 135. 



Pycnidiis ignotis; uredosoris epiphyllis. sparsis, rotuudatis, 



parvis, 0,2-0,4 mm. diam., subcuticularibus, mox nudis, ciunarao- 

 meo-brunneis, pulverulentis; paraphysibus intermixtis, parvis ot 

 inconspicuis, clavatis, 40-50^9-15, stipite angusto, tunica 1 ;j. rr., 

 apice crassiori (1-2 ;j..), supra pallido flavo-aurati.s, subtus hyaiinis; 

 uredosporis ellipsoideis v. late oblougis, 20-30* 16-22; tuuica ob- 

 scure cinnaraomeo-brunnea, 1,5-2,5 ;j.. cr.. crebro ot crasso verra- 



