39 



Specimens examined. — Oregon: Seaside (Seribner & Shear 1711). Vancomrr hlnnd: 

 (J. Maeoim 93). Almhi: Prince of Wales Island (W. G. Wright 1595). 



This species appears nearly related to B. richardsoni, but is much more robust, with 

 rather denser panicle and coarser pubescence which covers the empty glumes as 

 well as the flowering glumes. It appears to l)e the same as the />'. j>i(rgan.'< of 

 Grisebach in Ledebour's "Flora Rossica." 



1 758. Ilroiii »N cilidlns piiri/mix A. (iray, 



2. 1:229. 1840. nom. iiud. 



21. BROMUS PURGANS L. Sp. PI. 1: 7(1 

 Man. Bot. 600. 1848. (Fig. 22.) 



BroDi as ifteuddii Frank in Steud. Nom. Bot. ed 

 A rather stout perennial, 7-14 dm. 

 high. Culm erect, smooth or 

 pubescent at the nodes. Sheaths 

 usually coarsely retro rse-pilose ; 

 ligule 1-2 mm. long, rather firm, 

 truncate; blades broadly linear- 

 lanceolate, 15-30 cm. long, 5-15 

 mm. broad, somewhat auricled 

 at the base, short-pilose on the 

 nerves above or smooth, scabrous 

 or smooth beneath. Panicle 

 large, lax, nodding, mostly 15-25 

 cm. long; lower branches 2-4, 

 long, slender, flexuous. Spike- 

 lets mostly 7-11 flowered (Lin- 

 meus says " 8 ad 14 " ), 2-2.5 cm. 

 long, terete-acuminate at first, be- 

 coming oblong-lanceolate in out- 

 line and somewhat flattened ; 

 empty glumes narrow, acuminate, 

 sparseli/ covered with sliort pubes- 

 cence; the lower l-nerved, 5-7 mm, 

 long; the upper broader, 3-nerved, 

 7-9 mm. long; flowering glume 

 lanceolate, acute, or sub-acute; 

 5-nerved, or sometimes with two 

 more faint nerves when mature, 

 10-12 mm. long, with rather short 

 .sparse pubescence over tlie back, 

 emarginate or shortly bidentate 

 at the apex; awn straight, slen- 

 der, 4-6 mm. long; palea nearly 

 equaling its glume, rachilla slen- 

 der, pubescent, 2-3 mm. long. 



Type collected by Kalm in Canada. 



General distribution; New England to Florida, west to northeastern Wyoming, and 

 south to Texas. 



Specimens examined. — Connecticut: Bridgeport (E. H. Fames). New York: Ithaca 

 (F. V. Coville); Little Falls (G. R. Vasey). New Jersey: Stockholm (Wm. M. 

 Vansickle). Pennsylvania: Huntingdon County (T. C. Porter) ; Easton (T. C. Por- 

 ter) ; Philadelphia (C. E. Smith 39; F. Lamson-Scribner) . Delaware: Wilming- 

 ton (A. Commons 79, 130). Maryland: Baltimore (K. A. Taylor 11802). Dis- 

 trict of Columbia: Washington (F. Blanchard); Chain Bridge (Conant & Vasey). 



Fig. 2\.—Bromiiii pncificu!' : a, empty glumos with two 

 Horets; b, dorsal view of the flowering glume. 



