. Flora of Syria, Palestine, and Sinai : from the Taurus to Ras Muhammas and from the Mediterranean sea to the Syrian desert. POLYaONACE^ (buckwheat FAMILY.) 701 Var. lieteraiitlia, Boiss. Some of the flowers (often in thesame receme), 4-merous, with flat akene, others 5-merous, with trique-trous akene — Same range as last; also Aintab and Sof Dagh. 7. POIuYGONVm, L. Knotweed. Flowers perfect. Perigonium 4-5-cleft or -parted, herbaceous orpetaloid, persistent, enclosing the fruit. Stamens 4-8, in two rows,inserted at base of perigonium. Styles or stigmas 2-3. i\.kene trian-gular or lenticular,
. Flora of Syria, Palestine, and Sinai : from the Taurus to Ras Muhammas and from the Mediterranean sea to the Syrian desert. POLYaONACE^ (buckwheat FAMILY.) 701 Var. lieteraiitlia, Boiss. Some of the flowers (often in thesame receme), 4-merous, with flat akene, others 5-merous, with trique-trous akene — Same range as last; also Aintab and Sof Dagh. 7. POIuYGONVm, L. Knotweed. Flowers perfect. Perigonium 4-5-cleft or -parted, herbaceous orpetaloid, persistent, enclosing the fruit. Stamens 4-8, in two rows,inserted at base of perigonium. Styles or stigmas 2-3. i\.kene trian-gular or lenticular, crustaceous, with erect seed. Embryo accumbentto angle of albumen, or curved and somewhat immersed, with leafycotyledons and superior radicle — Annual or perennial herbs or shrubs,with the base of the petiole expanded into a membranous, tubularsheath (ockrece), and membranous, interfloral bracts (ochreoles).. (a) Tip of a flowering branch of a Polygonum, showing the ochrea3, leaves, and spikesof flowers. (&) A single flower, showing the 4 lobes of perigonium with stamens insertedat their base, and the free ovary with two styles, connate at base, (c) Vertical section ofovary, showing the erect ovule, (d) Vertical section of seed, showing the lateral embryo. * S2nl:e 1, at ti^) of simple stem. Styles 3, free^ with small stigmas. Stamens 5-8. Oclirem oblique, not ciliate. 1 P. Bistorta. * * Stems usually drancJdng, spikes at end of hrandies. Styles 3-3, m,oreor less connate. Stamens 8-4, loith alternate scales. Ochrem cylindrical, usually ciliate. t Perennials. Flowers in i pjentandrous^ in 3 hexandrous. 2 P. amphibium, 3 serrulatum. 702 POYVGONACEJS. (BUCK\VHEAT FAMILY.) 11 Annuals. Flowers hexandrous. 4 P. Hydropiper, 5 Pesicaria, 9 lapathifolium. * * * Stems cVniibing. Floicers 3-G, clustered in axils. Stamens 8,stigmas nearly sessile. Leaves cm^date-sagittate. 7 P. Couvulvulus, 8 dume
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Keywords: ., bookcentury1800, bookdecade1890, bookidfloraofsyria, bookyear1896
