. 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 . CALLITRICHACEAE. Vol. II. Callitriche palustris L. Vernal Water-Star- wort. Water Fennel. Fig. 2770. triclie palustris L. Sp. PI. 969. 1753. triclie verna L. Fl. Suec. Ed. 2. 4. 1755- triche vernalis Koch, Syn. Fl. Germ. Ed. 2. 245. 1837. Aquatic or growing in the mud, stems a'-jo' long. Sub- merged leaves linear, i-nerved, retuse or bifid at the apex, S"-io" long;
. 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 . CALLITRICHACEAE. Vol. II. Callitriche palustris L. Vernal Water-Star- wort. Water Fennel. Fig. 2770. triclie palustris L. Sp. PI. 969. 1753. triclie verna L. Fl. Suec. Ed. 2. 4. 1755- triche vernalis Koch, Syn. Fl. Germ. Ed. 2. 245. 1837. Aquatic or growing in the mud, stems a'-jo' long. Sub- merged leaves linear, i-nerved, retuse or bifid at the apex, S"-io" long; emersed or floating leaves obovate, obtuse, truncate or retuse at the apex, narrowed at the base into a margined petiole, dotted with stellate scales: aquatic forms occur with the leaves all linear; fruit 2-bracted, oval, A"-l" long, about one-half as broad, nearly flat on the face, slightly notched at the apex, winged only toward the apex, or all around, separated by a deep groove. Mostly in cold or running water, apparently occurring nearly Canada. Als Water-chickweed. running South July-Sept. 3. Callitriche heterophylla Pursh. Larger Water-Starwort. Fig. 2771. Callitriche heterophylla Pursh, Fl, Am. Sept. 3. 1814. Similar to the preceding species, either aquatic or grow- ing in the mud. Fruit smaller, mostly obovate, usually slightly less than 4" long, and about the same breadth, broadly notched at the apex, thick, plano-convex, almost ventricose at the base; lobes obtusely angled with a small intervening groove, wingless, or with a narrow wing or raised border on the margins; styles usually longer than the fruit, erect. In ponds and slow streams, Newfoundland to Manitoba, Florida. Missouri, Colorado and Louisiana. July-Sept.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
