. 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. 66o POLYGONACEAE. Vol. I. * Stem, and branches terete and usually striate. tAchenes much exserted from the calyx. Plants prostrate ; achene broad. Sepals decidedly petaloid, very broad, much overlapping and lax at maturity; achene acutish or blunt. i. Sepals slightly petaloid, rather narrow, scarcely overlapping and appressed; achene acuminate. 2.
. 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. 66o POLYGONACEAE. Vol. I. * Stem, and branches terete and usually striate. tAchenes much exserted from the calyx. Plants prostrate ; achene broad. Sepals decidedly petaloid, very broad, much overlapping and lax at maturity; achene acutish or blunt. i. Sepals slightly petaloid, rather narrow, scarcely overlapping and appressed; achene acuminate. 2. P. Fowleri. Plants erect; achene narrow. Flowers hidden in the ocreae; sepals about Vz" long; achene slender. Flowers exserted; sepals i"-iJ4" long; achene stout. tf Achenes included in the calyx, or exposed at the tip. Sepals with white or pink margins. Pedicels not exserted from the ocreae; sepals less than i%" long at maturity. Achenes with striate faces. Mature sepals over W long; achenes acute. 5. Mature sepals less than %" long; achenes acuminate. 6. Achenes with granular or nearly smooth faces. Plants prostrate; leaves broad; mature sepals about 54" long. Plants erect or nearly so; leaves narrow; mature sepals about 1' 3- leptocarpum. exsertum. aviculare. long. 7. P. buxiforme. Pedicels exserted; sepals over i}4" long at maturity. Sepals with yellowish or greenish margins. Leaves broad; achene mostly dull. Leaves narrow; achene mostly shining. Achenes much longer than wide; mature calyx tapering at the base. Achenes about as wide as long; mature calyx auriculate-cordate at the base. 8. P. prolificum. 9. P. atlanticum. 10. P. ereclum. 11. ** Stem and branches angled. Leaves plicate; fruiting pedicels short, erect. Leaves flat, margins revolute; fruiting pedicels long, deflexed. 12. P. triangulum. P. tenue. P. i. Polygonum maritimum L. Seaside Knot- weed. Fig. 1615. Polygonum maritimum L. Sp. PI. 361. 1753. Pol
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
