. 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. 44S . LEMNACEAE. Vol. I. 4. Lemna perpusilla Torr. Minute Duckweed. Fig. 1124. Lemna perpusilla Torr. Fl. N. Y. 2: 245. 1843. L. paucicostata Hegelm. in A. Gray, Man, Ed. 5, 681. 1868. L. perpusilla trinervis Austin, in A. Gray, Man. Ed. 5, 479. 1867. Thallus small, i"-ii" long, oblong to obovate, often purplish- tinged beneath, unsymmetrical and abru
. 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. 44S . LEMNACEAE. Vol. I. 4. Lemna perpusilla Torr. Minute Duckweed. Fig. 1124. Lemna perpusilla Torr. Fl. N. Y. 2: 245. 1843. L. paucicostata Hegelm. in A. Gray, Man, Ed. 5, 681. 1868. L. perpusilla trinervis Austin, in A. Gray, Man. Ed. 5, 479. 1867. Thallus small, i"-ii" long, oblong to obovate, often purplish- tinged beneath, unsymmetrical and abruptly narrowed to a very short stalk, provided throughout with numerous stomata, more or less 3-nerved; rootcap pointed; fruit ovoid, unsymmetrical; seed 12-16-ribbed, and transversely striated. In ponds, rivers, springs and lakes, New York and New Jersey to Minnesota, Nebraska and Missouri. June-July. 5. Lemna minor L. Lesser Duckweed. Fig. 1125. Lemna minor L. Sp. PL 970. 1753. Thallus obovate or subcircular, i"-3" long, thickish, rarely reddish or purplish-tinged, short-stalked when young, provided throughout with stomata, obscurely 3-nerved, very rarely 4-5- nerved. Rootcap obtuse or subtruncate; fruit symmetrical, sub- turbinate, wingless; seed with a prominent protruding hilum, deeply and unequally In ponds, lakes and stagnant waters, throughout continental North America except the extreme north, and in the Bahamas. Also in Europe, Asia, Africa and Australia. Duck's-meat. Toad-spit. Water lentils. Mardling. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Britton, Nathaniel Lord, 1859-1934; Brown, Addison, 1830-1913. New York, Scribner
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
