. Die Indiana weed Buch. Unkraut. Unkraut OP den GÄNSEFUSS FAMILIE. 69 gefunden mit denen von Klee, aber werden leicht durch passende Bildschirm getrennt - ing. Rechtsmittel, wie bei der vorhergehenden. 25. Polygonum sagittatum L, Pfeil-leaved Abreißen - Daumen. (A. N. 3.) Stamm schwach, 2-5 Meter lang, decumbent oder Klettern durch recurved Stacheln, die zahlreiche entlang der Tour Winkel sind; Blätter pfeilförmige, spitz, fast Stiellose, die Halme und wenig stachelig. Blüten in dichten terminal Köpfe; Kelchblätter hellrot mit weißlichen Margen, nicht gekielt. Samen dreieckig, dunkel rot, glatt, glänzend, J Zoll lang. (Abbn. 8, c; 3G) Grenzen

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. The Indiana weed book. Weeds. WEEDS OP THE GOOSEFOOT FAMILY. 69 found with those of clover, but are easily separated by proper screen- ing. Remedies, same as for the preceding. 25. Polygonum sagittatum L, Arrow-leaved Tear-thumb. (A. N. 3.) Stem weak, 2-5 feet long, decumbent or climbing by recurved prickles which are numerous along its tour angles; leaves arrow-shaped, pointed, nearly sessile, the stalks and midribs prickly. Flowers in dense terminal heads; sepals pale red with whitish margins, not, keeled. Seeds triangular, dark red, smooth, shining, J inch long. (Figs. 8, c; 3G.) Borders of ditches, ponds and moist places generally. July- Oet. Mowers and haymakers in low ground are familiar with this weed, its sharp prickles being a sufficient excuse for its common name. Remedies: mowing and burning before the seeds ripen; draining and cultivation. The halberd-leaved tear-thumb (P. ari- folium L.), differing in the leaves being hastate and the seeds'lens- shaped, occurs with the preceding but is much less common. The GoosEgooT Family.—CHENOPODIACEtE. Annual or perennial weed-like or homely herbs, with mostly alternate leaves. Flowers small, greenish, very numerous, variously clustered but usually in panicled spikes or solitary in the axils of the leaves; petals none; calyx 2-5 parted; stamens as many as or fewer than the lobes of the calyx and opposite them; ovary free from the calyx, 1-celled, 1-seeded. Fruit a utricle, the seed-vessel be- ing surrounded by a loose, thin wall or bladder-like sac. (Fig. 14, d.) Only about 16 species of the family grow wild in Indiana, but among them are several weeds which are rapidly spreading or occur throughout the State. The beet and spinach are cultivated members of the family. The com- mon name, '' goosefoot, '' refers to the shape of the leaves. 26. Chenopodium album L. Lamb's Quarters. White Goose-foot. Pigweed. (A. I. 1.) Stem pale green, often striped with purple, erect, usually much Fig.37. (AfterVasey.) branched, 1

Stockbilder mithilfe von Tags suchen

• bookcentury1900
• bookdecade1910
• bookyear1912
• bücherubjektgewächse