60 Contributions from the Gray Herbarium 
Mr. F. Tracy Hubbard, is included at the request of the author, 
as is a combination under Setaria relating to a species from tropi- 
cal America, recently found needful by Mr. Hubbard. 
GRAMINEAE 
Dantuonta filifolia Hubbard, spec. nov. Perennis caespitosa; 
culmi infra glabri, supra folium supremum puberuli, paullo tenui- 
ores sed rigidi erecti circa 7.5 dm. alti purpurascentes; folia plera- 
que radicalia; vaginae radicales glabrae (ore excepto), 3-6 mm. 
longae paullo validus nervatae, saepe ad laminam abrupte con- 
tractae et ad junctionem pilosae; laminae arcte involuto-filiformes, 
usque ad 3.6 dm. longae (explanatae circa 1 mm. latae), cum 
lamina supra ad basin veram pilosa et in parte superiore intra 
nervos prominulos puberula; folia culmorum 1 vel 2, cum vaginis 
glabris aliquanto ad orem auriculatis; ligula annulum ciliatum 
circa 0.2 mm. longum formans, laminis 3-4 cm. longis basin versus 
circa 2mm. latis apicem versus valde involutis; panicula com- 
pacta infra cum ramis 1-2 adpressis instructa, in parte superiore 
spicata, ramo infimo usque ad 4.5 em. longo, rachi puberulo ad 
axillas infimas breviter piloso; spiculae 10-12 mm. longae 5-8- 
florae; glumae glabrae purpureae ad marginem et ad apicem acu- 
tum scariosae subaequales 10-12 mm. longae flosculis multo lon- 
giores; pili calli numerosi circa 3.5 mm. longi; lemma albidum 
margine longe pilosum aliter glabrum 4.5—-5.5 mm. (arista exclusa) 
longum, cum dentibus 3 mm. longis instructum; arista basin 
_ versus pallide brunnea plana et spiraliter torta in parte superiore 
albida teres recta geniculato-patens 4-6 mm. longa; palea circa 
2.5 mm. longa ad marginem et apicem obtusiusculum ciliolata. — 
Mexico: Puebla, Honey, June 17 ?, 1908, C. G. Pringle, no. 10,818 
(TPE in Gray Herb.). Noticeably different from other species 
of Danthonia in the long filiform leaves, in the very long glumes 
as compared with the small florets, and in the very hairy appeat- 
ance of the florets caused by the long callus-hairs in connection 
with the long marginal hairs of the lemmas. 
Seraria sphaerocarpa (Salzm.) Hubbard, comb. nov. Panicum 
sphaerocarpum Salam. ex Steud. Syn. Pl. Glum. i. 51 (1854). It 
has recently been found necessary to form this new combination 
in order to give correct labeling to a grass which forms no. 230 of 
