. Range-wide status assessment of cirsium longistylum (long-styled thistle) . Cirsium longistylum; Cirsium; Long-styled thistle; Endemic plants; Rare plants. Leaves linear-lanceolate, base not decurrent, length about 10 times the width, to 15 cm long, 1.5 cm wide, lobed to 1/3 width, or less, the smaller upper leaves essentially entire, lobes ovate, often irregular with numerous fine marginal spines to 5 mm long. Leaves gray-green, lightly arachnoid above, white, villous below. Flower heads 3 cm high, 2.5 cm wide. Arrangement of heads variable and not exclusively in a close terminal cluster, b
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1457 x 1715 px | 24.7 x 29 cm | 9.7 x 11.4 inches | 150dpiMore information:
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. Range-wide status assessment of cirsium longistylum (long-styled thistle) . Cirsium longistylum; Cirsium; Long-styled thistle; Endemic plants; Rare plants. Leaves linear-lanceolate, base not decurrent, length about 10 times the width, to 15 cm long, 1.5 cm wide, lobed to 1/3 width, or less, the smaller upper leaves essentially entire, lobes ovate, often irregular with numerous fine marginal spines to 5 mm long. Leaves gray-green, lightly arachnoid above, white, villous below. Flower heads 3 cm high, 2.5 cm wide. Arrangement of heads variable and not exclusively in a close terminal cluster, but also borne one or two at the apex of the stem and on lateral branches. Plants usually bearing many floriferous branches to 15 cm long on the terminal third of the stem. Heads are subtended by a few reduced leaves, the uppermost about the same size as the involucral bracts with gray multi-cellular hairs at right angles to the margin. Involucre 2 cm high, composed of five to six rows of phyllaries. Outer phyllaries linear-lanceolate, base 1.5-2 mm broad, weakly glandular or with a dark blotch, surface glabrous, apical portion slightly dilated with a yellow lacerate fringe, tipped by a slender 2 mm spine. Middle phyllaries similar but progressively less dilated-lacerate. Inner phyllaries longer, lanceolate, tip not or only slightly dilated and lacerate. Flowers white, corolla 20-22 mm long, tube 7-9 mm, lobes 3.5-5.5 mm, pappus 18-19 mm, tawny with 30-40 setae, longer setae clavellate; anthers, including appendages 7.5-8.5 mm long, free anther tips usually incurved; pollen 44-51 |li in outer diameter; style long exserted to 1 cm beyond the corolla, tip to joint of style 3.5-5 mm. Achenes 5.5- 6.5 mm x 2 mm, light brown, sometimes with purplish flecks. Rosette leaves moderately spiny. the margins with broad, shallow divisions, green and glabrous above, densely white pubescent below (Moore and Frankton 1963).. Please note that these images are extracted from scanned page images t