ORDER 155. GRAMINEJE. 



403 



1 G. mars tima Wahl. Culm 1 Hf, terete; IVB. rolled; pan. erect, dense, tho 



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



2 O. distaiis 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. n N. Y. 



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



secund, virgate ; spkl. linear, 8 10"; fls. 7 12, obtuse. Wet. June. 



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



spkl. linear, 9 I'}" ; fls. 46, distant, acute. ii Wet places, Penn., and N. June. 



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



ing, flexuous branches in 3's 5's ; spikelets (K) purple, 2 3", with G 8 ovate, obtuse 

 flower* (A-). U Wet places, Pa., and N. A handsome grasp. 



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



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

 2-toothed ; the veins conspicuous, ii Swamps, Ya., and N. June. 



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



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

 oblong spikelet, conspicuously veiaad. U Wet, N. June. 



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



ceme-like, nodding, 8 10' ; branches eo'itary 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, 34'; spkl. ovate, acute, thick, of 



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

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



JOG. Canadeiisis Trin. (m) Panicle large, G 8' long, branches flexuous, in half- 

 whorls, spreading or recurved ; spkl. (n) broad-ovate, G-S-flwd. ; upper pale (o) very 

 obtuse, lower acute and longer. n 3 4C. Shady, N. July. 



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

 G-9-flowerccl. Glumes 2, unequal, roundish. Pales 

 vcntricous, lower one cordate, embracing the shorter, 

 roundish upper one. Grain beaked. Paniculate, \ 

 spkl. large, drooping on slender pedicels. 



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



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

 less flowers, ii 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 spikes, which are light-brown, hyaline, f-' iu 

 length. From Europe. 



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



flowers, (i) From Europe. Small and pretty. M/J 



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

 and two-edged, 3-20-fiwd. 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, if Smooth, erect, often branching. 



Spikelets 6 16" long, in large open panicles, 



drooping Nos. 1, 2 



Spikelets 26", subsessile, in slender, spikelike 



panicles Nos. 3, 4 



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

 wide; spikelets oblong-ovate, 9 12", flat, 9-13- flowered, 

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

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



