. 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 102d meridian. Botany; Botany. 106. MARIANA Hill, Veg. Syst. 4: 19. 1762. [Silybum Vaill.; Adans. Fam. PI. 2: 116. 1763.] Annual or biennial, simple or branched, nearly glabrous herbs, with large alternate clasp- ing, sinuate-lobed or pinnatifid, white-blotched leaves, and large discoid heads of purple tubular flowers, solitary at the end of the stem or branches. Involucre broad, subglobose,
. 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 102d meridian. Botany; Botany. 106. MARIANA Hill, Veg. Syst. 4: 19. 1762. [Silybum Vaill.; Adans. Fam. PI. 2: 116. 1763.] Annual or biennial, simple or branched, nearly glabrous herbs, with large alternate clasp- ing, sinuate-lobed or pinnatifid, white-blotched leaves, and large discoid heads of purple tubular flowers, solitary at the end of the stem or branches. Involucre broad, subglobose, its bracts rigid, imbricated in many series, the lower ones fimbriate-spinulose at the broad triangular summit, the middle ones similar but armed with huge spreading or recurved spines, the inner lanceolate, acuminate. Receptacle flat, densely bristly. Corolla-tube slender, the limb expanded and deeply 5-cleft. Filaments monadelphous below, glabrous. Anthers sag- ittate at the base. Style nearly entire. Achenes obovate-oblong, compressed, glabrous, sur- mounted by a papillose ring. Pappus bristles in several series, flattish, barbellate or scabrous. [St. Mary's thistle.] A montypic genus of the Mediterranean region. i. Mariana mariana (L.) Hill. Milk Thistle. Fig. 4654. Carduus marianus L. Sp. PI. 823. 1753. Mariana mariana Hill, Hort. Kew. 61. 1769. Silybum marianum Gaertn. Fruct. & Sem. 2: 378. 1802. Stem striate, glabrous or slightly woolly, little branched, 2°-4° high. Leaves oblong-lanceolate, prickly, strongly clasping, the lower often 12' long and 6' wide, the upper much smaller, scarce- ly lobed, acute; heads about 2I' broad; spines of the middle involucral bracts often I*' long; pap- pus bristles white, barbellate. Escaped from gardens near Kensington, Ontario (T. Walker, according to Macoun), in ballast and waste grounds about the eastern seaports, south to Alabama, and on the Pacific Coast from British Co- lumbia to southern California, where it is naturalized
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
