. 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 102nd meridian . I. Trapa natans L Swimming Water- nut. Water-Caltrop. Fig. 3076. Trafa L. Sp. PI. 1753. Rooting in the mud at the bottom of lakes or slow streams; stem often several feet long. Submerged leaves approximate, pectinately dissected, l'-4' long; floating leaves in a rosette sometimes 1° broad, their blades rhombic-ovate, sharply dentate above, broadly cuneate and entire below, a
. 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 102nd meridian . I. Trapa natans L Swimming Water- nut. Water-Caltrop. Fig. 3076. Trafa L. Sp. PI. 1753. Rooting in the mud at the bottom of lakes or slow streams; stem often several feet long. Submerged leaves approximate, pectinately dissected, l'-4' long; floating leaves in a rosette sometimes 1° broad, their blades rhombic-ovate, sharply dentate above, broadly cuneate and entire below, about i' wide, gla- brous and shining above, the conspicuous veins of the lower surface beset with short stiff lairs; petioles of the floating leaves 2'-6' long, inflated and spongy; flowers white, about 3" broad; fruit 1-2 long, armed with 4 some- what recurved spines. Naturalized in ponds and streams, eastern Mas- sachusetts, and near Schenectady, N. Y. Native of Europe. Called also sanghara-nut, Jesuit's water-nut. Seed mealy, edible. June-July. TOO. HALORAGIDACEAE K!.&Garcke,Bot. 151. 1852. FAMILY. Perennial or rarely annual herbs, mainly aquatic, with alternate or verticillate leaves, the submerged ones often pectinate-pinnatifid Flowers perfect, or monoe- cious, or dioecious, axillary, in interrupted spikes, solitary or clustered. Calyx- tube adnate to the ovary, its limb entire or 2-4-lobed. Petals small, 2-4, or none. Stamens 1-8 Ovary ovoid-oblong, or short-cylindric, 2-8-ribbed or winged, 1-4-celled; styles 1-4; stigmas papillose or plumose. Fruit a nutlet, or drupe, compressed, angular, ribbed or winged, indehiscent, of 2—4 i-seeded carpels. Endosperm fleshy ; cotyledons minute. Eight genera and about 100 species, of wide geographic distribution. Stamen i ; ovary i-celled. Stamens 2-8 ; ovary 3-4-celled. Fruit 3-angIed or 4-angled. Fruit of 4 carpels. I. HIPPURIS L. Sp. PI. 4- 1753- Aquatic herbs, with simple erect stems, and vertic
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
