. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. ?20 GEAMINEAE (GRASS FAMILY) 1. Z. palustris L. (Indian Rice, "Water Oats.) Annaal; culms 2-3 m. bigh ; leaves flat, 5-10 dm. long, m. wide. (Z. aquatica of auth. not L.) — Swampy borders of streams and in shallow water; common, especially northwestw. July, Aug. (Asia.) Fig. 73. 2. Z. aquitica L. Culms about 1 m. high; leaves nar- rower (less than 1 cm. wide) ; pistillate portion of panicle more appressed. —Me. to Minn., and northw.
. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. ?20 GEAMINEAE (GRASS FAMILY) 1. Z. palustris L. (Indian Rice, "Water Oats.) Annaal; culms 2-3 m. bigh ; leaves flat, 5-10 dm. long, m. wide. (Z. aquatica of auth. not L.) — Swampy borders of streams and in shallow water; common, especially northwestw. July, Aug. (Asia.) Fig. 73. 2. Z. aquitica L. Culms about 1 m. high; leaves nar- rower (less than 1 cm. wide) ; pistillate portion of panicle more appressed. —Me. to Minn., and northw. 17. ZIZANI6pSIS Doll & Asoh. Spikelets unisexual, the pistillate above, the staminate below on each branch of the panicle, much alike in appearance, laterally compressed; glumes subequal, membranaceous, the first glume of the pistillate spikelet with a short terminal awn, the lemma acute, palea none ; glumes and lemma of staminate spikelet acute, nerveless, palea none ; stamens 6 ; grain ovoid, with a chartaceous easily separable pericarp, loosely inclosed in the —A tall aquatic grass with long leaves and long narrow terminal panicles. (Name from Zizania and Si//!!, appearance, from likeness to the preceding genus.) 1. Z. miliUcea (Miohx.) Doll & Asch. Perennial by a creeping rootstock; culms 1-4 111. high, geniculate at the lower nodes; leaves flat, 3-10 dm. long, 1-3 cm. wide. {Zizania Michx.) — Swamps, Va., O., and southw. May. 73. Z. aquatica x 1. rf spikelet. $ spikelet. Pistil with scales. 18. LE^RSIA Sw. Cnx-GKASS. White Grass Spikelets 1-flowered, flattened laterally, perfect, but those in the open panicles usually sterile, those inclosed in the sheaths cleistogamous and fruitful; glumes none, lemma boatshaped, somewhat indurated, awnless, clasping the palea by a pair of strong marginal nerves ; palea of like texture, much narrower, 1-nerved; stamens 1-6.— Perennials of moist ground, with rough leaves and short racemes of imbricated spikelets a
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