Weeds of the Farm and GardenOrange Judd Company, 1912 - 281 páginas |
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Página 87
... involucre being very hard the seeds were thus able to delay germinating . In the case of the cocklebur , one " seed " germinates one year and the other the next . When the seeds ' coats are hard the seeds may retain their vitality for ...
... involucre being very hard the seeds were thus able to delay germinating . In the case of the cocklebur , one " seed " germinates one year and the other the next . When the seeds ' coats are hard the seeds may retain their vitality for ...
Página 160
... involucre white , five to eight , persistent , rounded and oblong ; flowers in a close conical spike , each flower subtended by a white bract ; stamens six to eight , short filaments adnate to base ; ovary sunk in rachis of spike , one ...
... involucre white , five to eight , persistent , rounded and oblong ; flowers in a close conical spike , each flower subtended by a white bract ; stamens six to eight , short filaments adnate to base ; ovary sunk in rachis of spike , one ...
Página 172
... involucre ; petals none , calyx in- ferior , corolla - like , tubular , four to five - lobed or four to five - toothed ; stamens free , anthers two - celled ; ovary one- celled and one - seeded , forming a kind of nut ; embryo coiled ...
... involucre ; petals none , calyx in- ferior , corolla - like , tubular , four to five - lobed or four to five - toothed ; stamens free , anthers two - celled ; ovary one- celled and one - seeded , forming a kind of nut ; embryo coiled ...
Página 173
... involucre ; clusters three to five- flowered in ample panicles ; calyx tube cylindrical , five- ribbed , limb colored , funnel shaped , five - lobed . Common in southern states from South Carolina to Texas . Wild four o'clock or um ...
... involucre ; clusters three to five- flowered in ample panicles ; calyx tube cylindrical , five- ribbed , limb colored , funnel shaped , five - lobed . Common in southern states from South Carolina to Texas . Wild four o'clock or um ...
Página 194
... ) .- The spurges are monoecious shrubs or herbs with alternate or opposite groups of leaves arranged in whorls ; flowers surrounded by a cup- shaped , four to five - lobed involucre , which 194 WEEDS OF THE FARM AND GARDEN 124 124.
... ) .- The spurges are monoecious shrubs or herbs with alternate or opposite groups of leaves arranged in whorls ; flowers surrounded by a cup- shaped , four to five - lobed involucre , which 194 WEEDS OF THE FARM AND GARDEN 124 124.
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Términos y frases comunes
achenes alfalfa annual awned biennial blue grass bracts branched brome grass bull thistle C. M. King calyx Canada thistle carpels cent Cirsium clover seed clusters cocklebur common weed corn corolla crab grass crop cultivated curled dock dodder erect Europe five five-lobed four foxtail fruit germination glabrous glumes hairy herb horse nettle impurities inches long involucre Iowa lanceolate leaf leaves linear lobes marsh elder meadows milkweed Minnesota Missouri morning glory mustard native North numerous oats oblong ovary ovate ovules panicles pappus pastures pepper grass perennial petals petioled pigweed pinnately pistil Plantago plantain plants plowing poisonous Polygonum prickly pubescent purple quack grass racemes ragweed roadsides roots rootstocks Rumex sepals sessile sheaths sheep sorrel slender smartweed smooth soil species spikelets spikes spreading Spurge squirrel-tail stamens stem stipules sulphate Sunflower sweet clover Texas three feet high toothed troublesome weed U. S. Dept upper waste places weed seeds wild yellow