. 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. Botany. 538 ELATINACEAE. Vol. II. hypogynous. Stamens the same number or twice as many. Ovary 2-5-celled; styles 2-5, stigmatic at the apex: ovules x, anatropous. Capsule with septicidal dehiscence. Placentae central. Seed-coat crustaceous, rugose or ribbed. About 30 species, of wide geographic distribution. Flowers 2-4-merous : glabrous aquatic or creeping herbs. i. Elatine.
. 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. Botany. 538 ELATINACEAE. Vol. II. hypogynous. Stamens the same number or twice as many. Ovary 2-5-celled; styles 2-5, stigmatic at the apex: ovules x, anatropous. Capsule with septicidal dehiscence. Placentae central. Seed-coat crustaceous, rugose or ribbed. About 30 species, of wide geographic distribution. Flowers 2-4-merous : glabrous aquatic or creeping herbs. i. Elatine. Flowers mainly 5-merous; pubescent ascending or diffuse herbs. 2. Bergia. I. ELATINE L. Sp. PI. 367. 1753. Small glabrous or glabrate aquatic or creeping herbs, with opposite or verticillate leaves, and ininute axillary mainly solitary flowers. Sepals 2-4, persistent, membranous, not ribbed. Petals of the same number, hypogynous. Stamens of the same number or twice as many. Styles or stigmas 2-4. Pod membranous, globose, 2-4-valved. Seeds =c, straight, or slightly curved, striate longitudinally and transversely. [Greek, fir-like, with reference to the leaves.] About 10 species, natives of temperate and warm regions. In addition io the following, another occurs in California and one in Montana. Type species: Elatine Hydropifer L. Petals and stamens 2 ; seeds distinctly sculptured. Leaves obovate ; seeds with g-io longitudinal and 20-30 transverse striae. 1. Leaves oblong or oval: seeds with 6-7 longitudinal and 10-12 transverse striae. 2. E. brachysperma. Petals and stamens mostly 3 ; seeds little sculptured. 3. E. triandra. I. Elatine americana (Pursh) Arn. Water-wort. Mud-purslane. Fig. 2905. Peplis americana Pursh, Fl. Am. Sept. 238. 1814. Elatine americana Arn. Edinb. Journ. Sci. i: 430. 1830. Erect or spreading, tufted, aquatic or terrestrial, i'-ii' long often submerged. Leaves obovate, obtuse, i"-3" long, i' wide or less; flowers sessile, axillary,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
