. 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. 12. Scirpus mucronatus L. Bog Bulrush. Fig. 812. Scirpus mucronatus L. Sp. PI. so. 1753. Perennial, culms stout, somewhat tufted, sharply 3-angled, smooth, i°-3° tall. Spikelets 5-12 in a capitate cluster, oblong, obtuse, many-flowered, 4"-o/' long, rather more than 1" in diameter, subtended by the solitary linear abruptly spreading involucral leaf; s
. 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. 12. Scirpus mucronatus L. Bog Bulrush. Fig. 812. Scirpus mucronatus L. Sp. PI. so. 1753. Perennial, culms stout, somewhat tufted, sharply 3-angled, smooth, i°-3° tall. Spikelets 5-12 in a capitate cluster, oblong, obtuse, many-flowered, 4"-o/' long, rather more than 1" in diameter, subtended by the solitary linear abruptly spreading involucral leaf; scales broadly ovate, obtuse, light brown with a nar- row green midvein, mucronate; bristles 6, stout, rigid, downwardly barbed, as long as the achene; stamens 3; style 3-cleft; achene obovoid, smooth, shining, dark brown, 3-angled, two of the sides nar- rower and more convex than the third. In a swamp in Delaware county, Pennsylvania. Prob- ably adventive or fugitive from Europe. Widely distrib- uted in the Old World. July-Sept. 13. Scirpus etuberculatus (Steud.) Kuntze. Canby's Bulrush. Fig. 813. Scirpus maritimus var. cylindricus Torr. Ann. Lye. N. Y. 3: 325- 1836. Rhynchospora etuberculata Steud. Syn. PI. Cyp. 143. 1855. 5". Canbyi A. Gray, Am. Journ. Sci. (II.) 38: 289. 1864. 5. etuberculatus Kuntze, Rev. Gen. PI. 758. 1891. 5". cylindricus Britton, Trans. N. Y. Acad. Sci. n : 79. 1892. Perennial by stout rootstocks, culm stout, sharply 3-angled above, 3°-6° high, the linear nodulose keeled and channeled dark green leaves nearly or quite as long. Involucral leaf solitary, 4'-lo' long, erect; spikelets in an apparently lateral simple or compound umbel, drooping, oblong-cylindric, acutish, 6"-io" long; primary rays of the umbel 1-4' long, bracted by 1 or more subulate-linear leaves; scales ovate or ovate-lanceolate, pale brown with scarious margins, acute, mucronulate; bristles 6, stout, rigid, about as long as the achene, serrate; stamens 3; style 3-c
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
