298 BOTANICAL GAZETTE [ocroneR 
glauca Vahl., but can scarcely be Triodia cuprea Jacq., which does not 
occur north of New York. PrRsoon (Syn. Pl.) refers P. crocea [crocata] 
to his P. hydrophila, which is given in Kew Index as a synonym of Leersia 
oryzoides. Nuttall (Gen. Pl.) retains P. crocata, and refers to this P. 
hydrophila Pers. as a doubtful synonym. 
Furthermore as to the validity of P. serotina Ehr. (Beitriige 6:83. 1791). 
This rests upon the mention of the name in EnRHAR?’s list of plants entitled 
‘Index Calamarium, Graminum et Tripetaloidearum Linn., quas in usum 
Botanophilorum collegit et exsiccavit.” Miss Mary A. Day, who has 
kindly verified the reference for me at the Gray Herbarium, states that 
the name is mentioned without description, ‘‘Poa serotina, Ehrh. Upsaliae.” 
As this is a nomen nudum, the name was not technically published, and the 
next name in chronological order should be taken up. This appears to be 
Poa triflora Gilib. Exerc."Phyt. 2:531. 1792. 
Poa triflora Gilib. has been confused in America with P. nemoralis L., 
but both species occur in the northern portions and extend southward in 
the western mountains. In the northeastern states Poa triflora extends 
southward to Pennsylvania and is quite common northward, while P. 
nemoralis is rare and seems to be introduced. 
P. palustris L. (Syst. ed. 10. 874. 1759) is used by ASCHERSON - 
GRAEBNER (Synops. Mitteleur. Flora 2:416) for P. serotina Ehrh., but 
this name is founded on a plate in Morrison’s History (p. 201, pl. Fe 
27), which is Phalaris arundinacea, and consequently cannot be used 
our plant, P. triflora Gilib. 
DIGITARIA Heist. 
This is based upon Plukenet, pl. 190, fig. 2, which is Trips 
L. (Index 550). Consequently, according to the recent “C ; 
Nomenclature,” Digitaria Heist. ex Adans. is published (Conee * * 
and its type is Coixdactyloides L. Sp. 972. 1753) inasmuch as Linn dod 
(J. c.) cites Plukenet, pl. 190, fig. 2. Tripsacum, based upon Cos 
loides, was established in 1 Syst. ed. 10). 
Digitaria as commonly ae was published by ScoPol (fi. es 
1772). The type of Digitaria Scop. is D. sanguinale, as 
3)s 
different group, certain botanists thought it advisable t - 
for the group typified by Panicum sanguinale, and take up 
in chronological order, Syntherisma Walt. -sitaria WAS 
The fact seems to have been overlooked that the ane ee ! 
used at an earlier date than that of ADANSON’S Familles 
