. 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. 27. Potamogeton pusillus L. Small Pondweed. Fig. 200. Potamogeton pusillus L. Sp. PI. 127. 1753. Potamogeton panormitanus Biv. Sic. PI. 1806-7. Potamogeton pusillus polyphyllus Morong, Coult. Bot. Gaz. 5 : 51. 1880. Potamogeton pusillus sturrockii A. Bennett in Hook. Stud. Fl. Ed. 3, 435. 1884. Potamogeton pusillus panormitanus Morong, Mem. Torr. Club, 3: Part
. 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. 27. Potamogeton pusillus L. Small Pondweed. Fig. 200. Potamogeton pusillus L. Sp. PI. 127. 1753. Potamogeton panormitanus Biv. Sic. PI. 1806-7. Potamogeton pusillus polyphyllus Morong, Coult. Bot. Gaz. 5 : 51. 1880. Potamogeton pusillus sturrockii A. Bennett in Hook. Stud. Fl. Ed. 3, 435. 1884. Potamogeton pusillus panormitanus Morong, Mem. Torr. Club, 3: Part 2, 46. 1893. Stems filiform, branching, 6'-2° long. Leaves all submerged, linear, obtuse and mucronate or acute at the apex, 2-glandular at the base, i'-3' long, about V wide, 1-3-nerved, the lateral nerves often obscure, or the leaf apparently nerveless; stipules short, hyaline, obtuse; peduncles usually 3"-9", or rarely 3' long; spikes 3-10-flowered; fruit obliquely ellipsoid, about 1" long and 4" thick curved and 2-grooved on the back or some- times with 3 distinct keels, the face slightly arched, beaked by a straight or recurved style; apex of the embryo slightly incurved and point- ing inside the base. Propagative buds occur in greater or less abundance. In ponds and slow streams, New Brunswick to British Columbia, south to Virginia, Texas and Cali- fornia. Also in Europe. July-Aug. The forms listed in the above synonymy are all more o'r less dis- tinctly, if inconstantly variable from the type. They are not sufficiently stable to merit specific recognition. This is the commonest of the completely submerged Pondweeds. It may readily be distin- guished from all other species of its group by its boat-shaped stipules which are usually twice as wide as the base of the 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 pe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
