134 



tate, black ; conidia clavate, 75-80 x 15//, contracted below inLo a 

 slender stipitate base, pale straw-color. 



Oa dead limbs of Cornus fiorida. West Chester, Pa. Everhart, 

 Haines, Jefferis and Gray. 



CoRYNEUM JUNIPERINUM. — Forming little black, sphaeriaeform, 

 scattered or aggregated, subconfluent tufts on living leaves of Juni- 

 perus cotfununis, Conidia vermiform-cylindrical, about 6-septate, 

 dark brown, 35-40 x 6-8 yU, on short, stout pedicels. 

 Decorah, Iowa, May 1882. E. W. Holway. 



Helicoma velutinum, — Prostrate hyphae nearly obsolete, erect 

 threads simple, subulate, septate, brown, 1 14-125 x 3^-4/^ ; conidia 

 with about two coils, brown and about 12-septate, 



H^ Ciirtisii,^tx\., differs in its abundant creeping hyphae and its 

 rather broader multiseptate conidia. H. Mullen, Cda., has subhya- 

 line spores not so closely coiled, and slenderer, and has also abund- 

 ant prostrate hyphae. On decaying bark of Ma-rnoUa. New- 

 field, N. J . ^ 



The measurements not otherwise noted are in micromillimeters, 

 t. €., thousandths of a millimeter. 



North American Genera Of Grasses.— Notes on Bentham's paper 



Society. 



J 



The subjoined list of genera of grasses is intended to comprise all 

 those represented in North America, north of Mexico, arranged ac- 

 cordmg to the system of classification of Bentham in the paper above 

 referred to. Several genera. Coix, L., for example, are included that 

 are only known as escapes from cultivation. Isachne is inserted with- 

 out a number as it is doubtful whether it occurs within our limits. 



Some of the notes appended to the list have already appeared in 

 another publication, but as they comprise valuable matter for refer- 

 ence they may well appear again for the use of the readers of the 

 Bulletin. The writer has only recently been able to consult the 

 paper by Bentham, or the matter here published would have been 

 presented at an earlier date. 



Series A. Panicaceae. 

 Tribe I. Paniceae.— i. Reimaria, Fliigge. 2. Paspalum, Lin. 3. An- 



thaenantia, Beauv. (Aulaxanthus, Ell.) 4. Amphicarpum, 



Kunth. 5. Eriochloa, HBK. 6. Beckmannia, Host. 7. 



Pamcum, Lin. 8. Oplismenus, Beauv. (Orthopogon, Br.) 9. 



Chaehum, Nees. (Berchtoldia, Presl) 10. Setaria, Beauv. 11. 



Cenchrus, Lin. 12. Pennisetum, Pers. (Gymnothrix, Beauv.) 



13. Sparfina, Schreb. (Trachynotia, Mx. Limnetis, Pers.) 14. 



Stenotaphrum, Trin. (Diastemanthe, Steud.) 15. Pharus, Lin. 

 Tribe IL Maydeae.— 16. Coix, Lin. 17. Tripsacum, Lin. 18. Zea, 



Lm. (Mays, Gaertn.) 



Tribe TIL Oryzeae.—ig. Hydrochloa, Beauv. 20. Zizania, Lin. 

 (Hydropyrum, Link.) 21. Luziola, Juss. (Caryochloa, Trin.) 

 T -K^Ar-^nT^'^' ^.''^- (Asprella, Schreb.) 23. Alopecurus, Lin. 

 ^^ -n Jnstegineae, Nees.— 24. r/^/zr^t/m Benth. (Sclerachne, 

 1 orr. Greenia, Nutt.) 25. Polypogon, Desf. 



