. 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 . 4. Callitriche autumnalis L. Autumnal or Northern Water-Starwort. Fig. 2772. Callitriche palustris var. bifiila L. Sp. PI. 696. 1753. Callitriche autumnalis L. Fl. Suec. Ed. 2, 4. 1755. Callitriche bifida Morong, Mem. Torr. Club 5: 215. 1894. Entirely submerged. Leaves crowded, linear or linear- lanceolate, clasping at the base, retuse or bifid at the apex, i-nerved, s"
. 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 . 4. Callitriche autumnalis L. Autumnal or Northern Water-Starwort. Fig. 2772. Callitriche palustris var. bifiila L. Sp. PI. 696. 1753. Callitriche autumnalis L. Fl. Suec. Ed. 2, 4. 1755. Callitriche bifida Morong, Mem. Torr. Club 5: 215. 1894. Entirely submerged. Leaves crowded, linear or linear- lanceolate, clasping at the base, retuse or bifid at the apex, i-nerved, s"-8" long, without stellate scales; fruit sessile, or rarely minutely pedunculate, orbicular or slightly narrower than long, J"-l" in diameter, its lobes separated by a deep groove and broadly winged on the margins; styles as long as the fruit, or shorter, soon deciduous; bracts none. In flowing water, Quebec and Lake Champlain to Michigan, Manitoba and Oregon, south in the Rocky Mountains to Colo- rado. Also in Europe and Asia. July-Sept. Family 72. EMPETRACEAE Dumort. Fl. Belg. 106. 1827. Crowberrv Family. Low evergreen shrubs, with small narrow nearly sessile exstipulate leaves jointed to short pulvini, channeled on the lower side by the revolute margins, and small dioecious or rerely polygamous flowers, axillary or in terminal heads. Calyx of 3 sepals. Corolla or 2 or 3 petals, or none. Staminate flowers with 2-4 (mostly 3) stamens, the filaments filiform, the anthers 2-ceIled, longitudi- nally dehiscent, sometimes with a rudimentary pistil. Pistillate flowers with a 2-several-celled sessile ovary, the single style cleft into as many stigma-bearing segments as there are ovary-cavities; ovules i in each cavity, amphitropous. Fruit a berry-like drupe, containing 2-several i-seeded nutlets. Embryo straight, terete, in copious endosperm. Three known genera, the following, and the monotypic Ceratiola of the southeastern United States. Flowers axillary; petals 3. i.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
