Sa i e 
106 Rhodora [JUNE 
material as P. pungens (P. muricatum Michx., not Lam. [i. e. Retz.]), 
when he said: “Cette plante a l'aspect d'un cenchrus par ses fleurs; 
elle se rapproche, par ses autres caracteres, du panicum crus galli." ! 
But in view of Hitcheock’s identification of the Michaux type from 
Lake Champlain with the European E. Crusgalli? it has seemed de- 
sirable to have the specimen again examined. M: Gagnepain has, 
therefore, most kindly compared for me specimens sent as nos. 1 and 2: 
no. l,the indigenous plant which seemed to be Michaux's species; 
no. 2, the introduced E. Crusgalli. Of the former specimen he writes, 
under date of June 26, 1914. 
"1. De tous points comparable au Panicum muricatum de l'herb. 
Michaux: 
Mémes pointes sur les glumelles, fortes, raides avec un renflement 
dur à la base. Ce sont ces aspérités qui ont sans doute fait donner à 
l'espéce son nom. 
* * * * * * * * * * * * 
J'ai écrit autrefois sous la dictée de M. Hitchcock, je crois, pour le 
P. muricatum Michx., P. Crus Garu L.” 
As stated, the European FE. Crusgalli, of which the writer has ex- 
amined many specimens, has much finer less spreading trichomes on 
the spikelets and is well matched by the commonly introduced plant 
of barnyards, cultivated fields, and similar artificial habitats. In 
North America rare plants seem to indicate a slight transition between 
the introduced and the indigenous plants but these specimens are so 
infrequent as to seem like probable hybrids of the two species. In 
view of the constancy of the European plant in the Old World, where 
it does not come in contact with the American plant with strongly 
muricate spikelets, this seems the reasonable explanation, and the 
indigenous American plant may be called 
EcnuiNocHLoA muricata (Michx.) n. comb. Panicum muricatum 
Michx. Fl. Bor.-Am. i. 47 (1803). P. pungens Poir. Encycl. Suppl. 
iv. 273 (1816). P. Crusgalli, var. muricatum Farwell, Mich. Acad. 
Sci. Rep. vi. 210 (1904).— The following are characteristic specimens. 
QvEBEc: shores of Lake Champlain, Michaux (type in herb. Michaux). 
Marne: Harding's, Brunswick, September, 1899, K. Furbish; wet . 
clayey basin, North Berwick, August 27, 1894, J. C. Parlin. VER- 
MONT: Manchester, August 22, 1903, Blanchard, no. 22. MassacHu- 
SETTS: sandy head of a cove, Bay View, Gloucester, September 11, 
1 Poir. Encyc. Suppl. iv. 273 (1816). 
2 Hitchc. Contrib. U. S. Nat. Herb. xii. 146. (1908). 
