ORDER loo. GRAMINE.E. 



403 



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



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

 {J 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. it N. Y. 

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



secund, virgate ; spkl. linear, 810" ; fls. 712, obtuse. Wet. June. 

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



spkl. linear, 9 VI" ; fls. 46, distant, acute, u Wet places, Penn., and N. June. 



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



ing, flexuous branches in 3's 5's ; spikelets (h) purple, 23", with 68 ovate, obtuse 

 flowers (k). U Wet places, Pa., and N. A handsome grass. 



6 G. pallida Trin. Weak, ascending, 1 2$f; Ivs. flat, with longligules; pan. capil- 



lary, spreading; spkl. few, 3"; fls. 59; lower pale 5-toothed at apex, upper 

 2-toothed ; the veins conspicuous, if. Swamps, Va., and N. June. 

 ,7 G. nervata 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 veinad. 2f Wet, N. June. 



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



ceme-like, nodding, 8 1(X; branches solitary or in 2's, appressed ; spkl. tumid, of 

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



9 G. obtusa (Muhl.) Pan. dense, oblong, erect, 3-4' ; spkl. ovate, acute, thick, of 



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

 dark green, ii Swamps, Penn., and N. Aug., Sept. 



10 G. Caiiadensis Trin. (m) Panicle large, 6 8' long, branches flexuous, in half- 

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

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



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

 C-O-flowered. Glumes 2, unequal, roundish. Pales 

 ventricous, 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 59 flowers; gl. smaller than the greenish-purple vein- 

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



2 B. MAXIMA. Pan. nodding at top ; spikelets oblong-cordate, of 1317 flowers. 



Gardens. Cultivated for the curious spike?, which are light-brown, hyaline, f ' ia 

 length. From Europe. 



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



flowers. 5) From Europe. Small and pretty. A 



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-^ 

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

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



Spikelets 610" long, in large open panicles, 



drooping NOB. 1, 2 



Spikelet 26", subsessile, in slender, epikelike 



panicles Nos. 3, 4 



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

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

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

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



