. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. 462 COMPOSITAE. Vol. 6. Silphium terebinthinaceum Jacq. Prairie Dock. Prairie Burdock. Fig. 4426. Silphium terebinthinaceum Jacq. Hort. : pi. 43. 1770. S. pinnatifidum Ell. Bot. S. C. & Ga. 2: Silphium terebinthinaceum pinnatifidum , Man. 220. 1848. Stem glabrous or nearly so, branchedand scaly above, 4°-io° high. Leaves allbasal or nearly so, cori
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. 462 COMPOSITAE. Vol. 6. Silphium terebinthinaceum Jacq. Prairie Dock. Prairie Burdock. Fig. 4426. Silphium terebinthinaceum Jacq. Hort. : pi. 43. 1770. S. pinnatifidum Ell. Bot. S. C. & Ga. 2: Silphium terebinthinaceum pinnatifidum , Man. 220. 1848. Stem glabrous or nearly so, branchedand scaly above, 4°-io° high. Leaves allbasal or nearly so, coriaceous, ovate, mostlylong-petioled, acute at the apex, cordateat the base, rough on both sides, often 12long and 6 wide, sharply dentate, laciniateorpinnatifid; heads numerous, ii-3broad,borne on glabrous peduncles; involucrehemispheric, its bracts ovate-oblong, erect,glabrous or minutely pubescent; rays 12-20;achenes obovate, narrowly winged, slightly2-toothed and emarginate at the apex. On prairies and in dry woods, southern On-tario and Ohio to Minnesota, south to Georgia,Iowa and Louisiana. Rosin-plant. July-Sept. 7. Silphium reniforme Raf. Kidney-leaved Silphium. Fig. 4427. Silphium reniforme Raf.; Xutt. Trans. Soc. (II)
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
