. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus SEDGE FAMILY. 327 19. S. paludosus. S. robustus. 20. S. fluviatilis. Spikelets several, capitate or umbellate, large; involucral leaves 2 or more. Achene lenticular or plano-convex; spikelets sessile or some stalked. Scales short-awned; achene lenticular. 1 Scales long-awned; achene plano-convex. Achene trigonous; spikelets mostly long-stalked. Achene sha
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus SEDGE FAMILY. 327 19. S. paludosus. S. robustus. 20. S. fluviatilis. Spikelets several, capitate or umbellate, large; involucral leaves 2 or more. Achene lenticular or plano-convex; spikelets sessile or some stalked. Scales short-awned; achene lenticular. 1 Scales long-awned; achene plano-convex. Achene trigonous; spikelets mostly long-stalked. Achene sharply and nearly exactly trigonous. Achene with one face broader than the other two. Achene obovoid-orbicular; leaves i"-2" wide; spikelets ovoid. 21. Achene obovoid ; leaves 4"-8" wide ; spikelets narrowly cylindric. 22. 5\ novae-angliae. Spikelets very numerous in compound umbels or umbelled heads, small; involucral leaves several; tall sedges. Bristles downwardly barbed; spikelets in umbelled heads. Spikelets ovoid or oblong, i}4"-2j4" long. Bristles equalling or slightly exceeding the achene; leaves 3"-8" wide. Style 3-cleft; achene 3-angled; bristles 6. Spikelets 3-8 in each head; bristles barbed throughout; scales obtuse. 23. 5". sylvaticus. Spikelets 8-20 in each head; bristles not barbed below; scales acute or awned. Plant dark green ; scales acute. Plant pale; scales rough-awned. Style 2-cleft; achene plano-convex; bristles 4. Bristles flexuous, twice as long as the achene; leaves 2"-$' Spikelets cylindric, 3"-$" long; style 3-cleft. Bristles smooth or slightly pubescent; umbel mostly decompound. Bristles shorter than or scarcely exceeding the scales. Bristles about as long as the achene; scales subacute. Bristles much longer than the achene; scales mucronate. Bristles much exserted beyond the scales when mature. wide. 24. 26, 27. 29. 30. 31. 51. atrovirens. S. pallidas. S. microcarpus. S. polyphyll
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
