32 



barium is labelled B. ciliatus, and this fact led to some confusion by Muhlenberg 

 and Torrey. Our plant is very closely related to B. ramosus. In the Black UWh, 

 Manitoba, and Nortliwe.st Territory it passes by various intermediate forms 

 through B. richardsoid pallidus into B. richardsoni. It is also connected by vari- 

 ous gradations with B. purgans, so that like nearly all of our species it can only 

 be separated arbitrarily. 

 16a. BROMUS CILIATUS L^VIGLTJMIS Scribn. in herb. n. var. 

 This differs from the species chiefly in having the flowering glumes entirely smooth 

 or with a very slight amount of pubescence on the margin at the base. The 

 type specimen has a somewhat narrower and less drooping panicle than the 



species, but other plants re- 

 ferred to below have about the 

 typical B. ciUafus panicle. 

 Type collected by W. Herriott, 

 Gait, Ontario, Canada, July, 

 1898. 

 Specimens examined. — Maine : 

 Dead River (Fernald & Strong 

 488) . North Carolina : Magnetic 

 City (A. G. Weatherby 197 and 

 140) ; Swain County (Beardslee 

 &Kofoid9). 

 17. BROMUS RICHARDSONI 

 Link, Hort. Berol. 2: 281. 

 1833. Bromus purfjans longi- 

 spicata Hook. Fl. Bor. Am. 2: 

 262. 1840. Bromus ciliatus 

 scariosus Scribn. U. S. Dept. 

 Agr. Div. Agros. Bui. 13: 46. 

 1898. (Fig- 17.) 

 An erect, robust, tufted, short-lived 

 perennial, about 6-13 dm. high. 

 Culm smooth. Sheaths typic- 

 ally smooth below and pilose 

 at the throat, sometimes scant- 

 ily pilose throughout; ligule 

 truncate, lacerate, 1-2 mm. 

 long; blades linear-lanceolate, 

 15-25 cm. long and about 5-12 

 mm. broad, mosthj scabrous 

 aboveand glabrousbeneath. Pan- 

 icle usually large, effuse, and 

 drooping, about 15-25 cm. long. 

 Spikelets drooping terete-acuminate at first, becoming oblong-lanceolate and 

 laterally compressed, mostly i^-o cm. long, 6-11-flowered; empty glumes smooth, 

 the lower acuminate; 1-nerved or rarely with two faint lateral nerves, 8-10 mm. 

 long; the upper 3- or rarely 5-nerved, 9-12 nun. long, obtuse, or inequilateral 

 and mucronate; flowering glume obtuse, emarginate, 7-nerved, li2-15 mm. long, 

 appressed ciliate-pubesccnt from the second nerve to the margin and nearly to the apex, 

 also across the hack at the base; awn straight 3-5 mm. long; palea slightly shorter 

 than its glume. 

 Type in the collection of the Royal Botanical Museum, Berlin, grown from seed sent 

 by Dr. Richardson from western North America. 



Fig. 16.— Bromus ciliatus: a, empty glumes; 6, dorsal view 

 of a flowering glume; c, palea. 



