180 FLORA OF MOUNT DESERT. GLYCERIA, R. Br. MANNA GRASS. 744 G. Canadensis (Mx.), Trin. RATTLESNAKE GRASS. JOB'S TEARS. C.B., ? Common in wet places. Malbaie 745 G. laxa, Scribner. C.B, A coarse leafy grass, 2°-4° high, with a diffuse ample panicule and oblong, somewhat turgid spikelets. Sheaths scabrous, the lower exceeding the internodes. Ligule about 1" long, thin, lacerate. Leaves 8'-15' long, 3"-4" wide, very rough-scabrous, both sides tapering to a sharp point or the lower ones abruptly sharp-pointed. Panicle 7'-9' long, the main axis and branches strongly scabrous, lower branches in twos or threes, the upper solitary, the longer and usually widely spreading lower ones 3'-5' long. Spikelets oblong or broadly ovate, 3-5-flowered, about 2" long, much exceeding the pedicels, and from 1"-1½" wide. Empty glumes unequal, scarios-margined, the larger second glume about one half the length of the first floret. Flowering glumes rounded on the back, 1"-1¼" long, broadly obovate, obtuse, with a narrow scarious margin above, 7-nerved, nerves not prominent. Palea nearly equalling the glume, the keels smooth, strongly curved above. Closely allied to G. Canadensis, but the smaller spikelets are green or purple tinged, and the more obtuse floral glume scarcely exceeds the narrower palea. F. Lamson-Scribner in Bull. Torr. Bot. Club, xxi. 37, sub nom. Panicularia laxa, and republished here as above at his desire. Seal Harbor (Redfield); — Somesville (Rand). A form apparently of this species with smaller and imperfectly developed spikelets, Great Cranberry Isle; Seal Harbor (Redfield). 746 G. obtusa (Muhl.), Trin. Common in wet grounds about Somesville. Also Southwest Harbor; Sea Wall (Rand). 747 G. elongata (Torr.), Trin. Wet woods. Near Beech Hill (Arnold Greene); — Canada B. Valley; Seal Harbor; Beech Mt. Notch (Rand). 748 G. nervata (Willd.), Trin. C.B. S., GR., W.BR Lul, GR, D. Dar Common in meadows. Anne to Shiffon (x, 9c R5a