. 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. Botany. 6. Myriophyllum heterophyllum Michx. \'arious- leaved Water-Milfoil. Fig. 3086. Myriophyllum heterofhylluin Michx. Fl. Bor. Am. 2; 191. 1803. Floral leaves in whorls of 3's to 5's, linear, ovate or lanceo- late, serrate or rarely entire, much longer than the flowers. Submerged leaves subverticillate or scattered, crowded, pectinate-pinnatifid', about 10" long, th
. 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. Botany. 6. Myriophyllum heterophyllum Michx. \'arious- leaved Water-Milfoil. Fig. 3086. Myriophyllum heterofhylluin Michx. Fl. Bor. Am. 2; 191. 1803. Floral leaves in whorls of 3's to 5's, linear, ovate or lanceo- late, serrate or rarely entire, much longer than the flowers. Submerged leaves subverticillate or scattered, crowded, pectinate-pinnatifid', about 10" long, the divisions 6-10 pairs, capillary; flowering spike elongated (sometimes 18' long); petals 4; stamens 4, rarely 6; fruit i" long, and slightly longer than thick; carpels 2-keeled on the back, their sides convex, usually slightly scabrous. In ponds, Ontario and New York to Florida, west to Minnesota, Texas and Mexico. Myriophyllum hippuroides Nutt., with narrower floral leaves and fruit slightly longer, a species of the Pacific United States, is recorded from southern Ontario. 7. Myriophyllum pinnatum (Walt.) Pinnate Water-Milfoil. Fig. 3087. Polamogelon pinnaliim Walt. Fl. Car. 90. 1788. Myriophvllnm scabratum Michx. Fl. Bor. Am. 2: 190. 1803. Myriophyllum pinnatum Prel. Cat. N. Y. 16. 1888. Leaves in whorls of 3's-5's. or sometimes scattered, the floral ones linear, serrate or pectinate, 2h"-6" long, gradually passing into the submerged ones which are crowded, pinnately dissected, the divisions few and capillary; spikes 4'-8' long; petals purplish; stamens 4, very rarely 6; carpels strongly 2-keeled and sca- brous on the back, separated by deep grooves, their sides flat: mature fruit about i" long and somewhat more than i" thick. In ponds. Massachusetts to Florida. Iowa. Missouri, Ne- braska, Louisiana and Texas. 8. Myriophyllum Farwellii Morong. Farwell's Water-Milfoil. Fij M. Fanvellii Morong, Bull. Torr. Club 18 : 146. 1891. Submerged;
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
