242 PATAGONIAN EXPEDITIONS: BOTANY. 



4. B. H^ENKEANUS Knth. 



Root fibrous. Culm erect, terete, glabrous, to 60 cm. tall. Sheaths 

 rough-hairy; ligules ovate, exsert, denticulate. Leaves linear, plane, 

 both sides rough. Panicle simple, contracted, nodding ; rays in 2's below, 

 single above, about i-spiculate, and the spikelet 5-6-flowered. Lower 

 gfames ovate, 3 and 9-nerved ; floral glume 9-nerved, rough, 2-toothed, 

 with a short straight awn between its teeth. 



Patagon., Chubut, in upland meadows. 







5. B. MACRANTHUS Meyen. (B. setifolius Presl.) 



Cespitiferous annual with fibrous roots. Culms decumbent at base, 

 terete, striate (10-12 cm.), rough at the panicle and sheaths. Ligule 

 short, ovate, fimbriate. Leaves narrow-linear, convolute-setaceous, rigid, 

 hairy. Panicle depauperate, of 1-3 spikelets, each 6-i2-flowered. Glumes 

 roughish, slightly unequal, 3-5-nerved; floral ghtme oval, Q-nerved, 

 rough, obtuse ; subapical awn two thirds as long as the spikelet. " 



(Mex.; Chili); Patagon., Chubut. 



(B. mango Desv. formed the chief bread-stuff in Chili before the advent 

 of Old World cereals. Its grain has a linear hilum.) 



6. B. PATAGONICUS Phil. 



Culm robust, smooth, sheaths glabrous, ciliate below the mouth ; ligule 

 truncate, denticulate ; lamina of upper leaves broad, very long. Panicle 

 erect, its rays in 5's, each bearing 1-3 spikelets ; these 13 mm. long, 4- 

 flowered. Glumes ovate-lanceolate, acute, unequal, the lower i -nerved, 

 the upper 3-nerved. Floral glume with appressed hairs ; subapical awn 

 more than one third its length. 



Chili; Patagonia. 1 



1 By the courtesy of Miss Day of the Gray Herbarium I give Philippi's description of this little- 

 known species : 



BROMUS PATAGONICUS Ph. Br. robustus, glabriusculus ; vaginis laevibus, glabris, infra os cili- 

 atisj ligula truncata, denticulata ; lamina foliorum superiorum longissima, lata ; panicula erecta 

 ramis quinis in quovis semiverticillo, erectis, apice spiculas I ad 3 gerentibus ; spiculis pedicello 

 longioribus, 6 lin. (13 mil.) longis, quadrifloris ; glumis ovato lanceolatis, acutis inaequalibus, in- 

 feriore uninervia, superiore trinervia, dimidiam spicalam aequante ; palea inferiore (sublente for- 

 tiori pilis appressis vestita) uninervia, apice biloba ; arista sub apice orta tertiam paleae partem 

 superante. 



Philippi, Anal. Univ. Chile, XLIII, 1873, P- 577- 



