ORDER 155. GRAMINE^E. 



403 



1 G. maritima Wahl. Culm 1 IJf, terete; Ivs. rolled; pan. erect, dense, tho 



branches in pairs; spkl. terete, about 5-flwd., fls. obtuse, if Mass. June. 



2 G. distans Wahl. Culm 1 2f, terete, firm; Ivs. flat; pan. spreading, the branches 



fascicled in 3's 5's; spkl. oblong, sessile, 3(3-6)-flowered. V N. Y. 



3 G. flultaiis (L.) Culm flattened, 3 5f; Ivs. broad-linear; lignle very large; pan. 



s-ccund, virgate ; spkl. linear, 8 10" ; fls. 712, obtuse. Wet. June. 

 1 G. arutiflora Torr. Culm flattened, 1 2f; Ivs. narrow; pan. long, raceme-like, 



spkl. linear, 912" ; fls. 46, distant, acute, li Wet places, Penn., and N. June. 

 1 G. aqiiatlca (L.) (g) Stout, leafy, 3 5f; Ivs. broad, soft; pan. diffuse, with spread- 



ii:i'. llexuous branches in 3's 5's ; spikelets (A) purple, 23", with 68 ovate, obtuse 



flu wen* (k). 11 Wet places. Pa., and N. A handsome grass. 



6 G. palllda Trin. Weak, ascending, 1 21f; Ivs. flat, with lougligules; pan. capil- 



lary, spreading ; spkl. few, 3"; fls. 5 9; lower pale 5-toothed at apex, upper 

 2-tootlu j d ; the veins conspicuous, li Swamps, Va., and N. June. 



7 G. iiorvala Trin. Culm 3 4f ; Ivs. broad-linear, ligules torn ; pan. large, diffuse, 



branches in 2's and 3's, capillary, pendulous in fruit; fls. about 5, in the ovate- 

 oblong spikelet, conspicuously veinod. 11 Wet, N. June. 



8 G. elonjjata Trin. Culm terete, erect, 3f; Ivs. narrow, liguie very short; pan. ra- 



ceme-like, nodding, 8 W; branches so'itary or in 2's, appressed ; spkl. tumid, of 

 about 2 obtuse, 5-veined (Is. Meadows, N., M., and W. July. 



9 G. obtiisa (Muhl.) Pan. dense, oblong, erect, 3 4'; epkl. ovate, acute, thick, of 



5 7 ovate, obtuse fls. ; lower pale obscurely 7-veined; culm 2 3f, Ivs. often longer, 

 dark green. 2J Swamps, Penn., and N. Aug., Sept. 



10 G. Canadensls Ti-in. (m) Panicle large, 6 8' long, branches flexuous, in hall- 

 whorls, spreading or recurved ; spkl. (n) broad-ovate, 6-8-flwd. ; upper pale (o) ven 

 obtuse, lower acute and longer, v 3 4f. Shady, N. July. 



48. BRIZA, L. QUAKING G. Spikelets cordate, 

 0-9-flowered. Glumes 2, unequal, roundish. Pales 

 vi'iitricous, lower one cordate, embracing the shorter , 

 roundish upper one. Grain beaked. Paniculate,\ 

 spkl. large, drooping on slender pedicels. 



1 B. media. L. Pan. erect, spreading; spkl. soon cordate, 



of 5 9 flowers; gl. smaller than the greenish-purple vein- 

 less flowers. V Meadows, coastward. N. Eng. to Penn. May. (b. c) 



2 B. MAXIMA. Pan. nodding at top ; spikelets oblong-cordate, of 13 17 flowers. 



Gardens. Cultivated for the curious spikes, which are light-brown, hyaline, f in 

 length. From Europe. 



3 B. MINOR. Pan. erect, diffuse : spkl. triangular, 5-7-flwd. ; glumes larger thau the 



flowers. 5) From Europe. Small and pretty. 



49. UNIOLA, L. UNION G. Spkl. compressed, 

 and two-edged, 3-20-flwd. Lower fl. or fls. neutral, 

 of 1 pale, similar to the 2 carinate gls. Pales awn- 

 lesn, the lower wing-keeled, upper doubly so. Sta. 1 

 nr 3. Grain free. U Smooth, erect, often branching. 



Spikelets 616" long, in large open panicles, 



drooping Nos. 1, 2 



Spikelets 26", subsessile, in slender, spikelike 



panicles Nos. 3, 4 



1 U. latlfolfa MX. (a) Culm 2-4f ; Ivs. very broad, 11' 

 wide; spikelets oblong-ovate, 912", flat, 9-13- flowered, 

 drooping on slender pedicels; glumes (c) unequal, much 

 smaller than the fls. (b} Sta. 1. u Dry woods. M., W. Elegant. August 



