74 



4 



coarse, erect, scattering hairs, which may be only the erect threads 



of some parasitic mold. ^ , 



AsTERiNA Plantaginis. — Perithecia innate, hemispheric, .003 m 

 diameter, clustered on brownish, immarginate spots which are scat- 

 tered irregularly over both sides of the leaf, but more abundantly on 

 the upper surface ; asci ovate- elliptical, .ooi'-.ooi3'x .0005' ; sporidia 

 crowded, oblong, obtuse, hyaline, 2-nucleate, slightly constricted 

 across the middle, .00035 -.0004'x .0002' ; mycelium nearly obsolete, 

 consisting of a few brown threads radiating from the base of the 



perithecia, or entirely wanting. 



On living leaves of Plantago major, Philadelphia, Pa., Oct., 1881. 



Dr. Geo. A. Rex, (N. A. F., No. 791.) 



Sphaerella Magnoliae. — Perithecia buried in the parenchyma 

 of the leaf, either collected in patches, giving the leaf, especially the 

 under surface, a clouded appearance, or sometimes occupying nearly 

 the entire surface ; ostiola mostly hypophyllous, barely piercing the 

 epidermis ; asci sublanceolate ; sporidia mostly biseriate, clavate- 

 oblong, pale straw-color, faintly nucleate, .00025'x .oooi'. 



Quite distinct from Sphaeria Magnoliae^ Schw., which renders 



the leaf bullate.. 



es of Magnolia glauca, December. (N. A. F,, 



No. 800.) 



Sphaerella hypericina. — Amphigenous. Perithecia minute, 



erumpent in little tuberculiform clusters of two to six ; asci oblong, 

 . 001'- 0012'x. 00015'-. 0002' ;- sporidia crowded, clavate-oblong, uni- 

 septate, often bent at the middle, yellowish, ,ooo4'-.ooo45'x .000 r . 



On fallen of Hypericum prolificum, (N- A. F., No. 797.) 



Hendersonia Xerophylll — Perithecia '-blongj covered by the 

 epidermis, which is elevated, blackened and fissured longitudinally 

 above them ; spores oblong, obtuse, pale brownish, 1-3-septate, the 

 extreme septum mostly very faint, or often wanting. 



On fading leaves of Xerophyllum aspJiodeloides. May. 



Septoria Trifolii. — Perithecia subcuticular, but soon exposed 

 by the peeling off of the epidermis, gregarious, forming little elon- 

 gated patches, or scattered evenly over the matrix ; spores fusiform, 

 curved, granular, ,0008'x . 000 r5'-.ooo2', resembling the spores of a 

 Cryptosporium, 



On dead stems of Trtfoliumpratense. 



Septoria Galtorum. — Perithecia punctiform, minute, scattered, 

 appearing like little black shining points ; spores acicular-filiform, 

 slightly curved, .ooo8'-.ooi' long, faintly septate. 



On dead stems of Galium, 



A list of Grasses collected by Mr. C. G. Pringle in Arizona and 

 California during the Summer of 1881, with Descriptions of those 

 Species not already described in American Publications. — Some of 

 these species are not well made out, and may prove new. I much 

 regret that I did not have access to Fournier's work on the Mexican 

 Grasses in the compilation of this list. Those species which appear 

 in Mr. Pringle's distributed sets are marked with an asterisk (*). 



1*. Paspalum distichum, L,, Amoen. Acad., v., 391.— Santa Cruz 

 Valley, near Tucson. Tune, 



