1906] Lamson-Scribner, — Trisetum and Graphephorum 87 



A slender glabrous perennial, with flat leaves and open nodding 

 panicles 10-12 cm. long. Spikelets 2-3-flowered, about 6 mm. long, 

 with unequal empty glumes, the broader 3-nerved second glumes 

 about equalling the florets; flowering glumes narrow, oblong, obtuse 

 or imperfectly 2-lobed or 2-toothed, awnless or with a very short awn 

 just below the apex (see figures above cited); paleae about J shorter 

 than the glume, hyaline; callus and joints of the rachilla hairy, the 

 hairs on the rachilla, at least the upper ones, 1.5 to 2 mm. long. 



Specimens examined: Mt. Kineo, Maine, C. E. & A. H. Smith, 

 1868; St. Anne des Monts River, Quebec, 0. D. Allen, 1881; Made- 

 leine River, Quebec, J. Maroun, 1882. 



Trisetum melicoideum Cooleyi (Gray) Scribn. n. comb.; Duponfia 

 Cookyi A. Gray, Man. ed. 2: 556, 18.56; Grnphephorum melicoides 

 major A. Gray, Annals Bot. Soe. Can. 1:^57, 1861; G. melicoides 

 Cooleiji Svvlhn. Mem. Torr. Bot. Club, 5: 53, 1S94. 



Lower sheaths pubesc-ent, upper surface (A' the leaves pilose; flower- 

 ing glumes 5-6 mm. long, minutely punctate-scabrous, entire at the 

 acute apex, awnless. Otherwise as in the species. 



Specimens in the National Herbarium: Orion, Michigan, no. 882, 

 O. A. Farwell, 1895; Flint, Michigan, D. Clark; Winooski River, 

 Vermont, C G. Pringle, 1877; St. Francis, :\laine, no. 187, M. L. Fer- 

 nald, 1893; Western Vermont, no. 1753, L. R. Jones, 1899; Gault, 

 Ontario, no. 54, \Vm. Harriot, 1901; Canada, no. 131, J. Maconn, 

 1871. Shores Lake Huron, Canada, no. 26,222, J. Macoun, 1901; 

 Rocky Banks, Lake Huron, Macoun, July, 1874. 



In the specimen last mentioned the spikelets are 3- to 4-flowered 

 and 9 mm. long; the callus hairs 1-2 mm. long, .soft and lax. 



A glabrous form from Vermont, collected by Mr. C. G. Pringle in 

 1876, connects the variety with the species. It has the elongated lower 

 leaves and entire flowering glumes in which the midnerve is some- 

 times excurrent just below the minutely toothed apex. 



Trisetum Wolfii Vasey, Monthly Report U. S. Dept. Agr. Mar. 

 156, 1874; Bot. Wheeler Expeilition 7: 294, PL 27, fig. 1, 2, 3, 1878; 

 Graphephorum Wolfii Vasey in Coulter Man. Rocky Mt. Bot. 423, 

 1885. 



A rather slender caespitose perennial, with glabrous culms, flat 

 leaves, and contracted usually densely flowered panicles 10 to 20 cm. 

 long. Sheaths and leaves glabrous or pubescent, varying to pilose. 

 Spikelets 2-3-flowered, 5-7 mm. long, slightly compressed; empty 

 glumes subequal in length, broadly lanceolate, acute, scabrous on the 



