160 GRAMINEAE (GRASS FAMILY) 



10. G. borealis (Nash) Batchelder. Similar to O.fluitans; the leaves com- 

 monly coiiduplicate; panicles 1.5-5 dm. long, often nearly simple, the slender 

 branches erect or spreading toward the ends, a pediceled spikelet in each axil ; 

 spikelets usually more numerous, 7-13-flowered, 1-1.5 cm. long, on slender 

 pedicels ^l as long ; glumes subacute ; lemmas 3.5-4 mm. Zowgr, thinner, strongly 

 7-nerved, minutely scabrous or glabrous, only the nerves hispidulous, obtuse and 

 erose at the shining scarious summit, slightly exceeding their paleas.—ln wet 

 Dlaces or shallow water, Nfd. to la., and north westw. June-Aug. 

 ' 11. G. acutiflbra Torr. Culms flattened, weak and slender, 3-9 dm. high ; 

 sheaths overlapping, the uppermost inclosing the base of the panicle ; blades 

 8-1 5 dm. long, scabrous above; panicle simple, 1.5-3.5 dm. long, the stifl 

 branches appressed or finally spreading ; spikelets subsessile, 5-12-flowered, 2-4 

 cm long ' lemmas 6-8 mm. long, acute, scabrous, exceeded by the long-acumi- 

 nate bicuspidate paleas.— Wet soil and in shallow water, Me. to Del., w. to O. 

 May, June. 



74. PUCCINELLIA Pari. 



Spikelets as in Glyceria but lemmas firmer, the nerves obscure, often sub- 

 acute and minutely pubescent at base. — Tufted perennials, mostly glaucous 

 saline species. (Named for Frof. Benedetto Puccinelli, an 

 Italian botanist.). 



1. P. maritima (Huds.) Pari. (Goose Grass, Sea Speaij 

 Grass.) Cuhns erect, 3-5 dm. high, from slender rootstocks ; 

 leaves flat or involute, acute or pungent ; panicles 8-12 cm. 

 long; lower branches solitary or in pairs, appressed or ex- 

 panded ; spikelets 4:-10-flowered, 6-12 mm. long ■,lemma£ obtuse 

 or truncate, 3-4 mm. long. — Salt marshes and beaches along 

 the coast, Mass., and north w. July, Aug. — Somewhat variable 

 172. P. Diaritima. ^^ ^j^g fQj-m of the panicle and size of the florets. (Eu.) 

 Panicle x Vio- FiG. 172. 



Spikelet x 2. g. P. angustata (R. Br.) Rand & Redfield. Culms erect or 



Floret X 21/2- ascending, 1.5-4 dm. high, from very slender rootstocks ; leaves 

 very narrow and involute ; ligule long; panicles 3-8 cm. long, narrow, the soli- 

 tary branches appressed or finally ascending ; spikelets 2-4-floioered, 3-6 mm. 

 long ; lemmas obtuse or subacute, 3 mm. or less long. (P. maritima, var. (?) 

 minor Wats.) — Salt marshes and sandy coasts, Ct., and northw. June, July. 



3. P. distans (L.) Pari. iVb rootstocks; culms rather stout, 3-6 dm. high, 

 geniculate below ; leaves mostly flat, short; ligule short; panicles 5-18 cm. long, 

 the branches in 4's or 5's, soon spreading and finally deflexed, 

 usually naked below ; spikelets S-6-flowered, 3-6 mm. long, 

 crowded; first glume less than half as long as lowest floret; 

 lemmas truncate-obtuse, about 2 mm. long. — Salt marshes along 

 the coast and on ballast, Del. to N. B. June-Aug. — Apparently 

 much rarer than the last, and perhaps not native. (Eurasia, 

 n. Afr.) Fig. 173. , ^. 173. P. distans. 



4. P. airoides (Nutt.) Wats. & Coult. Similar in habit to spikeietxs. 

 the preceding ; blades 5-10 cm. long, often involute ; panicle- 



branches ascending or erect or the lowest finally spreading or re^exed; spikelets 

 2-7-flowered, not crowded; glumes acute or subacute, the first more than halt 

 as long as the lowest floret. -In saline soil from the Dakotas southw. and 

 westw. ; occasionally eastw. in Minn, and Mich. ; adv. in s. Me. (Farlin). 



5 P BoRRERi (Bab.) Hitchc. Panicle compact, the branches mostly spike- 

 let-bearing from base and not deflexed. -On ballast and waste places along 

 the coast, from Del. to N. S. (Adv. from Eu.) 



75. FESTtrCA L. Fescue Grass 



Spikelets 2-many-flowered ; glumes unequal, narrow, acute, the first 1-, the 

 second 3-nerved ; lemma firm in texture, at least below, usually narrow, convex 

 or subcariua,te, 5-nerved. acute (obtuse in 2 species^ or tapering into a straight 



