. Selected western flora : Manitoba, Saskatchewan, Alberta . Botany; Botany; Botany. Fig. 85. — Ambrosia trifida. 22. XANTHIUM. Cocklebur. MoncBcious, the sterile and fertile flowers in different heads, the fertile below the sterile in short spikes; involucre of-the sterile flowers open and saucer-shaped; involucre of the fertile flowers closed, 2-flowered, leathery, and covered with hooked prickles, often 2-beaked. Coarse, weedy annuals with large alternate toothed leaves, and producing large bur-like fruit. 1. X. echinStum, Murr. Stem rough, 1-2 ft. high, tinged or spotted with purple;'leave
. Selected western flora : Manitoba, Saskatchewan, Alberta . Botany; Botany; Botany. Fig. 85. — Ambrosia trifida. 22. XANTHIUM. Cocklebur. MoncBcious, the sterile and fertile flowers in different heads, the fertile below the sterile in short spikes; involucre of-the sterile flowers open and saucer-shaped; involucre of the fertile flowers closed, 2-flowered, leathery, and covered with hooked prickles, often 2-beaked. Coarse, weedy annuals with large alternate toothed leaves, and producing large bur-like fruit. 1. X. echinStum, Murr. Stem rough, 1-2 ft. high, tinged or spotted with purple;'leaves rough, rather hard, obscurely 3 or 5-lobed, bluntly dentate and covered with scattered hairs, often glandular beneath; burs two-beaked, usually clustered in the axils, densely covered with prickles; prickles hooked, hairy about half their length; beaks stout, hairy, incurved. Sandy beaches, Man. and Fig. 86. — Xanthium echinatum. 2. X. glanduliferum, Greene. Closely resembling the preceding but the leaves covered with minute projections; bur yellow, not so densely covered with prickles, the pricklea hairy almost to the hook. Dry soil, Man. and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hales, B. J. (Benjamin Jones), 1868-1945. Toronto : Macmillan Company of Canada
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1915
