283 



Colloctod near Guadalajara by Br. Edward Palmer (No. 770) in 1880. Very 

 tall, with a largo, graceful, Leudiug panicle, resembling M. capillaris Ktli. 

 Muhlenbergia Bcoparia sp. nov. Culms densely tufted, 3 feet high, erect; leaves 

 narrowly linear, 1 to IJ feet long, conduplicate, rigid, smooth; panicle 1 to li 

 feet long, loose, tlexuoun, 1 to 2 inches wide, branches scattered, erect, single, 

 or 2, 3, or 5 together, rather distant, 1 to 3 inches long, flowering nearly to the base, 

 much subdivided above ; apiltelots on pedicels 1 to 3 times as long as themselves ; 

 empty glumes nearly e(iual, ovate-lanceolate, awn-pointed, the points extending 

 beyond the floral glume, which is 1 line long, purple, smooth except a small hairy 

 tuft at the base, and with an awn 8 to 10 lines long. 



Collected at Batopilas by Dr. Edward Palmer in 1885, and at Guadalajara (No. 

 2350) by C. G. Pringle in 1889. 

 Muhlenbergia longlglumis sp. nov. Culms strongly tufted, 2 to 2^ feet high ; radical 

 leaves one-half as long as the culm, rigid, narrowly ILuear, channeled and more or 

 less involute, scabrous ; upper culm leaves very long, lower sheath compressed, 

 smooth; ligulo narrow, 3 to 4 lines long, fimbriate, decurrent; panicle 1 foot 

 or more long, contracted, tiexuous, rather thin, the branches slender, scattered, 

 single or semiverticillate, approximate or somewhat interrupted below, unequal, 

 the longer about 2 inches long, erect, narrow ; spikelets on short pedicels; empty 

 glumes 2i lines long, whitish, membranaceous, minutely puberulent, acute or 

 mucronnlately toothed, a little longer than the floral glumes, which are linear- 

 lanceolate, tapering to the 2-toothed apex, smooth or minutely puberulent, with 

 a short, hairy tuft at the base; awn li to 2 inches long; palet nearly equaling 

 its glume. 



Collected at Guadalajara by Dr. Edward Palmer (No. 766) in 1886, and by C. • 

 G. Pringle (No. 2365) in 1889. 

 Muhlenbergia longifolia sp. nov. Culms densely tnfted, 4 feet high, stout; radi- 

 cal leaves almost eciualitig the culm, narrow at the base, rigidly involute 

 ^ve, margins scabrous, sheaths smooth; ligule conspicuous, 2 to 3 lines long, 

 acute, rigid, decurrent; panicle \\ to 2 feet long, 1^ to 2 inches wide, erect, not 

 very dense, the brandies scattered, tlio lower ones 3 to 5 inches long, loosely aj)- 

 pressed, capillary, thinly flowered, more or less naked below; spikelets very 

 slender, on long pedicels; cmi>ty glumes unequal, the lower less than, and the 

 upper more than, one-lialf as long as the floral one, the upper awn-pointed ; floral 

 glumes linear, little more than 1 line long, attenuate into the 4-line long awn. 

 Collected at Kio Blanco by Dr. Edward Palmer (No. 523) in 1886. 

 Muhlenbergia grandis sp. nov. Culm stronglyrooted, robust, 4 to 6 feethigh, leafy, 

 compressed below ; leaves distichous at base, one-half to two-thirds as long as the 

 culm, scabrous on the margins, \ inch wide below, aKenuate and often convo- 

 lute above, rigid; lower sheaths compressed; ligule very short (1 or 2 lines), 

 triangular; pauicle 1 to 2 feet long, 2 inches wide, dense, the branches scattered 

 or semiverticillate, 2 to 3 inches long, crowded, flowering mostly to or near the 

 base, erect and appressed, pedicels mostly shorter than the spikelets, which are 

 about 1 line long; empty glumes equaling the floral one, thin-membranaceous, 

 oblong-lanceolate, acute or subacute; floral glume elliptical-oblong, smooth ex- 

 cept a few hairs at the base; awns 8 to 10 lines long. 



Collected at Rio Blanco by Dr. Edward Palmer (No. 515) in 1886; and by C. 

 G. Pringle at .Jalisco (No. 1760) in 1888. A tall and attractive grass, with a 

 large contracted plume-like, dense panicle, with small spikelets. It differs in 

 its greater size, longer and larger panicle, and its short ligule from the M. dia- 

 tichophyUa Kth. of our Southern border. 

 SporoboluB capillaris sp. nov. Perennial, tufted, with a thick rhizome; culms 

 about 2 feet liigli, slender, flexuous, smooth ; radical leaves narrow, smooth, seta- 

 ceous-pointed, 4 to 6 inches long; those of the culm (3 or 4) similar, erect, 

 sheaths aruootli; ligule minute; panicle 5 to 7 inches long, capillary, spreading, 

 flexuous, the branches capill.ary, numerous, approximate, mostly scattered, sin- 



