GRASSES OF BRITAI.V. 279 



Obs. — Bromiis patulus is distinguished from Bromus arvensis 

 (Plate CXXVI.) in the spikelets being longer : outer palea nine- 

 ribbed ; inner palea shorter than the outer, not reaching beyond the 

 base of the awn : and the anthers much smaller ; — whereas in Bro- 

 mus arvensis the spikelets are smaller, of fewer florets ; outer palea 

 seven-ribbed : inner palea equal in length to the outer ; and the 

 anthers about four times as long as broad. 



Bromus patulus is disiinguished from Bromus commutatus (Plate 

 CXXIV.) in the outer palea being nine-ribbed ; all the awns longer 

 than their florets except the lowermost one : — whereas in Bromus 

 commutatus the outer palea is only seven-ribbed ; and all the awns are 

 shorter than their florets. 



Bromus patulus is distinguished from Bromus squarrosus (Plate 

 CXXVni.) in the 5p?M^f5 being of a more lanceolate form; outer 

 palea twice as long as broad ; aicn arising from near the summit of 

 the palea, and when dry but slightly spreading ; — whereas in Bro- 

 mus squarrosus the spikelets are of an oblong-lanceolate form ; outer 

 palea broader, twice the breadth more than equals its length by one- 

 fourth; aicn arising more remote from the summit of the palea, 

 and when dry conspicuously divaricating. 



Bromus patulus is distinguished from Bromus asper and Bromus 

 sterilis in the larger glume having seven ribs instead of only three ribs. 



This grass is not a true native. It grows near Hebden Bridge, 

 where it was discovered by Mr Gibson, who sent me a specimen, and 

 from which the accompan\-ing figure was taken. It is a native of 

 France and Germany. Grows in corn-fields and waste places. Of 

 little agricultural importance. .^ ^ ^^ 



Flowers in June. ;^:jf VV Y O ft K 



GTANICA 



Explanation of Plate CXXVII. Bromus pat7(hts, natural siz^>^^.^^^ ^^ ^, 



Fig. 1. Spikelet, showing the two glumes and fourteen florets. 



2. Floret, showing the two paleae. 



3. Outer palea opened, showing the nine ribs. 



4. Ligule. 



5. Ovarium, pistils, stamens, and scales. 



