. 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. 180 CYPERACEAE (SEDGE FAMILY^ Strictly l-flowered ; upper scales ovate, pointed, rough on the keel; stamens and styles 2 ; leaves linear. âLow grounds, Md. to O., 111., and southw. Fig. 236. 3. DULfCHIUM Pers. Spikelets linear, flattened, sessile in 2 ranks on peduncles emerging from the sheaths of the leaves ; scales lanceolate, decurrent, forming flat wing-like margins on the joint below. Perianth of 6-9 downwardly barbed bristles. S
. 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. 180 CYPERACEAE (SEDGE FAMILY^ Strictly l-flowered ; upper scales ovate, pointed, rough on the keel; stamens and styles 2 ; leaves linear. âLow grounds, Md. to O., 111., and southw. Fig. 236. 3. DULfCHIUM Pers. Spikelets linear, flattened, sessile in 2 ranks on peduncles emerging from the sheaths of the leaves ; scales lanceolate, decurrent, forming flat wing-like margins on the joint below. Perianth of 6-9 downwardly barbed bristles. Stamens 3. Style 2-cleft above. Achene flattened, linear-oblong, beaked with the long persistent style. â A perennial herb, with " terete simple hollow culm (2-10 dm. high), jointed and leafy to the summit; leaves short and flat, linear, 3-ranked. (Name of uncertain origin.) 1. D. arundinaceum (L.) Britton. (i>. spathaceum Pers.) â Wet swamps and borders of ponds, Nfd. to Wash., and southw. July-Oct. Fig. D. arundinaceam. 4. ELE6CHARIS R. Br. Spike Rush Spikelet few-many-flowered. Scales imbricated in many (rarely in 2 or 3) ranks. Perianth of 3-12 (commonly 6) bristles, usually rough or barbed downward, rarely obsolete. Style 2-3-cleft, its bulbous base persistent as a tubercle jointed upon the apex of the lenticular or triangular achene. âLeafless (rarely with basal capillary leaves), chiefly perennial, with tufted culms sheathed at the base, from matted or creeping rootstocks; flowering in summer. (Name from ^\os, a marsh, and x^/"^) grace; being marsh plants.) a. Spikelet hardly If at all thicker than the spongy-cellular culm ; scales firmly persistent. Spikelet cylindric, many-flowered; scales coriaceous, faintly nerved or nerveless. Culm terete 1, E. interatincia. Culm sharply i-angled 2. E, guadrangulata. Spikelet linear- or lance-awl-shaped, few-flowered; scales herba- ceous, distinctly nerved 8, E. Mobhinsii. lb. Spikelet much thicker than the cul
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