. Selected western flora : Manitoba, Saskatchewan, Alberta . Botany; Botany; Botany. COMPOSITiB 149 1. A. trfflda, L. Great Raq- 1 WEED. Annual, stout, 2-10 ft. high, hairy; leaves opposite, all ex- cept the upper deeply 3-lobed; petioles margined. Rich soil, —- a not uncommon weed, espe- cially about dwellings, Man. and westward. 2. A. pulostachya, DC. Per- ennial RAGWEED. Much branched, reclining, and spreading from a creeping rootstock; leaves opposite, once pinnatifid, the lobes of the upper entire, those of the lower often incised. Dry soil, some- times a troublesome weed, Fig
. Selected western flora : Manitoba, Saskatchewan, Alberta . Botany; Botany; Botany. COMPOSITiB 149 1. A. trfflda, L. Great Raq- 1 WEED. Annual, stout, 2-10 ft. high, hairy; leaves opposite, all ex- cept the upper deeply 3-lobed; petioles margined. Rich soil, —- a not uncommon weed, espe- cially about dwellings, Man. and westward. 2. A. pulostachya, DC. Per- ennial RAGWEED. Much branched, reclining, and spreading from a creeping rootstock; leaves opposite, once pinnatifid, the lobes of the upper entire, those of the lower often incised. Dry soil, some- times a troublesome weed, 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 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
