26 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
FiGcuRE 7.—Bromus catharticus, X 1 (Peebles, Harrison, and Kearney 1271). 
JAMAICA: Cinchona, Harris 10919, 11455, 12482; AMitchcock 9699. 
Hope Grounds, Harris 11250. Gordon Town, Hart 741. 
Haiti: Massif de la Selle, Ekman H 7740. 
Sa HESTUCA Le Sp bl 73) gal /53. hss ume 
Spikelets few- to several-flowered, the rachilla disarticulating above 
the glumes and between the florets; glumes narrow, acute, unequal, 
the first sometimes very small; lemmas rounded on the back, mem- 
branaceous or somewhat indurate, 5-nerved, the nerves often obscure, 
acute or rarely obtuse, awned from the tip or rarely from a minutely 
bifid apex. 
First glume two-thirds to three-fourths as long as the second... 1. F. DERTONENSIS. 
First glume much shorter than the second, 1 to 2 mm long.....-. 2. F. MYUROS. 
1. Festuca dertonensis (All.) Aschers. and Graebn., Syn. Mitteleur. 
Fl. 2: 558. 1900. 
Bromus dertonensis All., Fl. Pedem. 2: 249. 1785. Europe. 
Slender tufted annual; culms 30 to 50 cm tall; blades narrow; pani- 
cles narrow, nodding, nearly simple; spikelets 4- to 6-flowered, short- 
pediceled; first glume about 4 mm long, the second 6 to 7 mm long; 
lemma lanceolate, scabrous on the back toward the apex, 7 to 8 mm 
long; awn slender, 10 to 13 mm long (fig. 8, B). 
Open and waste places in the United States, especially on the 
Pacific coast; uplands of Jamaica; introduced 
This species was referred to F’. bromoides L. in the Grasses of the 
West Indies.’ 
Jamatica: Cinchona, Harris 9504, 10917, 11276, 11509, 11700, 
12456; Hitchcock 9701. Morces Gap, Harris 12526. Abbey Green, 
Eitchcock 9353. Gordon Town, Hart 681, 750. 
2. Festuca myuros L., Sp. Pl. 74. 1753. Europe. 
Similar to /’. dertonensis; culms weaker; panicle longer and narrower; 
spikelets 2- to 3-flowered; first glume 1 to 1.5 mm long, the second 
4 to 4.5 mm long (fig. 8, A). 
7 Contrib. U. S. Natl. Herb. 18: 395. 1917. 
