. 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. 29. Potamogeton diversifolius Raf. Rafinesque's Pondweed. Fig. 202. Potamogeton hybridus Michx. Fl. Bor. Am. i: 101. 1803. Not Thuill. 1790. Potamogeton diversifolius Raf. Med. Rep. (II.) 5: 354. 1808. Potamogeton diversifolius multidenticulatus Mo- rong, Mem. Torr. Club, 3: Part 2, 48. 1893. Potamogeton diversifolius trichophyllus Morong, Mem. Torr. Club, 3: p
. 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. 29. Potamogeton diversifolius Raf. Rafinesque's Pondweed. Fig. 202. Potamogeton hybridus Michx. Fl. Bor. Am. i: 101. 1803. Not Thuill. 1790. Potamogeton diversifolius Raf. Med. Rep. (II.) 5: 354. 1808. Potamogeton diversifolius multidenticulatus Mo- rong, Mem. Torr. Club, 3: Part 2, 48. 1893. Potamogeton diversifolius trichophyllus Morong, Mem. Torr. Club, 3: part 2, 49. 1893. Stems flattened or sometimes terete, much branched. Floating leaves coriaceous, the largest 1' long by 1' wide, oval or elliptic and obtuse, or lanceolate-oblong and acute; petioles generally shorter, but sometimes longer than the blades, filiform or dilated; submerged leaves setaceous, seldom over I" wide, 1/-3' long; stipules obtuse or truncate, 3"~s" long, those of the floating leaves free, those of the submerged leaves sometimes adnate; emersed peduncles z"~7" l°n!=; submerged peduncles 2"-3" long, clavate, as long as the spikes; emersed spikes 3"-s" long, occasionally inter- rupted; fruit cochleate, rarely over i" long, 3-keeled, the middle keel narrowly winged and usually with 7-12 knob-like teeth on the mar- gin, the lateral keels sharp or toothed; embryo coiled ii times. In still water, Maine to Florida, west to California and Texas. June-Sept. A common and well-marked species which often covers large areas of water, practically to the exclusion of every- thing else. From P. dimorphus, its nearest relative, it may readily be distinguished by its distinctly stalked submerged spikes of 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
Size: 1424px × 1754px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
