398 



ORDER 155. GRAMINE^E. 



34. TRICUSPIS, Beauv. Spkl. terete, or tumid, 3-9-flwd. 

 Glumes unequal, awnless. Lower pale (n, c) conspicuously fringe- 

 bearded on the 3 strong veins, tipped with 2 or 3 



teeth, and 1 or 3 short awns or cusps ; upper pale 

 much shorter, 2-toothed (ri). Fls. paniculate. 

 Sheaths hairy at throat. Aug., Sept. 



WINDSORIA. Culm erect, simple. Lower pale 



3-cusped Nt 4. 1, 2 



S UHALEPIS. Culm spreading, branched. Lower 



pale 1-eusped Nos. 3, 4 



1 T. aeslerioides (Mx). False Red-top, (a, a, n, m) Culm 



3 5f ; Ivs. linear, involute when dry ; pan. open, loose. 

 8 12', the slender branches at length spreading; spkl. 

 (a) oblong, 3", 5- or 6-flwd., purple, shining. 11 Beautiful. 

 /3. tleji-u'ona. Branches of the panicle flexuous ; spkl. 3-5-flwd., 2". Pa. 



2 T. ambigiia (Ell.) Culm 2 3f, wiry ; Ivs. narrow and rolled; pan. small (35'), 



few-flwd. ; spkl. ovate, the 5 7 fls. divaricate, u Pine-barrens, S. 



3 T. purpurea (Walt.) (b) Culm bearded at the nodes, 10 18'; Ivs. subulate, short; 



panicles more or less sheathed ; fipkl. (b) 3-flwd., awn scarcely exceeding the eroded 

 segments of its pale. Coast sands, Mass, to Fla. (c 1 , lower pale.) 



4 T. corn uta (Ell.) Culm 2f ; Ivs. and sheaths hairy; awn of the lower pale plu 



mous, much longer than the lateral teeth, recurved. Dry sands, S. 



35. ARUNDO DONAX. A gigantic ornamental grass from Italy, 

 where it is cult, for vine-poles, fence-wood, fishing-rods, etc. Culm 10 15f high ; Ivs. 

 broad, flat, smooth, and shining; pan. diffusely branched ; gl. as long as the 3 fls. ; rachip 

 beset with long hairs ; lower pale with a short awn in the cK-ft at apex. 71 



/3. VKKSICOLOR. Gardener's Garters. Leave* strip> d with white. 



36. GRAFHEPHORUM, Desv. Spkl. of 35 remote fls. with sub 

 equal glumes. Fls. bearded at base. Gls. and pales thin, lanceolate, awn- 

 less, convex, not keeled. U Erect, glabrous. Lvs. flat. Panicle simple 



G. meliooidex Beauv. Culm slender, 1 2f, with 2 or 3 short erect linear Ivs. ; pan. 

 loose, 34' long; spkl. 2-3-flwd., 3^" long. Upper Mich. (C. E. and A. II. Smith). 

 /3. ? iritioruiii (Aira tnf. Ell.) " Fls. somewhat woolly at base, not villous." Ga. 



37. GYNERIUM ARGENTEUM. PAMPAS GRASS. A magnificent reed 

 from S. Am., becoming common. Leaves in a dense, radical cluster, recurved, nar- 

 row, channeled. Culms 10 18f, clustered, bearing dense, hairy panicles, which are 

 lj 2f, silvery white, with innumerable flowers and their long, silky 



hairs. Some of the panicles are fruitful ( B ), others barren ( ). 



38. DACTYLIS, L. ORCHARD G. Spkl. 8-5-flwd.' 

 compressed. Glumes unequal, shorter than the Us 

 Pales subequal, lance-acuminate, the lower (and glumes) 

 carinate, awn-pointed. Lvs. channeled. Panicle com- 

 posed of dense 1 -sided clusters. June. 



D. glomerata L. Culm 2 4f high; Ivs. broad, glaucous; stipules 

 lacerate ; spkl. loose-flwd. ; gl. very unequal. U Shady fields. A 

 good grass for hay or pasturage. 



39. KCBLERIA, Pers. Spkl. 2-7-flwd., compressed; gl. subequa 

 acute, scarcely shorter than the fls. ; upper fl. pedicellate ; lower pale 



