650 Dothideacc;o, Phiagmosporae, Homostegia. 



lente composito visum cellulas rotundatas subcoharentes, ex ascis 

 tenuissimis subclavatis paraphysibusque constantes exhibet. Sub- 

 stantia nigra, madida grumosa, sicca dura cornea. Evolutio a Do- 

 thideis non abnormis est. Ut maculse deustae minutai primum sub 

 epidermide prorumpunt. Tn Gyrophoris (Ach.) epidermidem ut pu- 

 stulas magnitudinae Vicitv sacpe evehunt; dein discum formantes ab 

 epidermide thalli more Lecanorarum margiiiati magis proceduni. 



II. Roumegueria*): in phanerogamis parasitic&. 



3. Homostegia Goudotii (Lev:) Sacc, Dothidea Goudotii Lev. Ann. 5340 

 scien. nat. 3, 1845, p. 55, — Erumpens epi- hypophylla, subro- 

 tunda vel elongata puiverulenta, nigra; loculis periphericis mini- 

 mis ; ustiolis nullis; ascis elongatis, octosporis; sporidiis ellipticis 

 utrinque attenuatis, multilocularibus, hyalinis. 



Hab. in foliis Chusqueae del Paramo, Tolima, Nova Gra- 

 nata (Just. Goudot). 



4. Homostegia Tetradeniae (Berk.) Sacc, Dothidea Tetradenice Berk. 5341 

 Fungi of Ceyl. 11. 1173. — Mycelio floccis reticulatis radiantibus: 

 pseudoperitheciis hic illic sparsis ; ascis ellipticis; sporidiis oblon- 



gis hyalinis, 4-septatis, 37 u. longis. 



llab. in pagina infer. foiiorum Tetradenia? in Ceylon. — 

 Format plagulas tenues minutas. — Var. triseptata Berk. 1. c. 

 sporidiis 3-septatis. Ibidem 



5. Homostegia Magnoliae (Cooke) Sacc, Dothidea Magnoiice Cooke 534? 

 Grev. VII, p. 50. — Epiphylla, sparsa, atra, elliptica vel angulata, 

 applanato-convexa, rugosa; asois clavato cylindraceis; sporidiis cy- 

 lindricis, obtusis, leniter curvulis, triseptatis, liyalinis, 20^5. 



Hab. in foliis Magnolise, Darien Carol. Am. bor. (Ravenel). 



6. Homostegia rugodisca (Cooke et Hark.) Sacc, Dothidea rugodisca 5343 

 Cooke Grev. 1881, IX, p. 87. — Hypophylla; maculis irregulari- 



bus fuscis; loculis angulatis, applanatis, rugosis, congestis; ascis 

 subclavatis; sporidiis apice rotundatis, deorsum attenuatis, trise- 

 ptatis, haylinis, 1(3-17-4. 



llab. iu foliis Arbuti Menziesii in California Amer. bor. 



^H \ RKNESS). 



7. Humostegia amphimelafena (Mont.) Sacc, Dothidea amphimelama 5344 

 Mont. Syll. n. 777 et Cent. IV, n. 94, in Ann., 2, XX, p. 372. — 



*) Subgenus optimo Eq. C. Roumeguere dicatum. 



