(Last Modified On 6/19/2013)
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(Last Modified On 6/19/2013)
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Species
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Liabum bourgeaui Hieron
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PlaceOfPublication
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Verh. Bot. Vereins Prov. Brandenburg 48: 208. 1907.
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Description
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Coarse herb or weakly woody subshrub, 1-2 m tall, the upper internodes tightly felted-lanate, dull white to light brown, often streaked with brownish pilose hairs protruding from the lanate tomentum. Leaves opposite, pinnately veined with 2 prominent lateral veins arising from near the base, the upper leaf blades ovate to subdeltoid, acuminate above, obtuse to abruptly contracted below to a prominently winged petiole, the margin subentire to minutely denticulate, 10-20 cm long, 7-15 cm wide, ca. 11/2 times longer than wide, the upper surface glabrescent to obscurely arachnoid tomentose, the lower surface closely felted- lanate with occasional brownish hairs, usually near the prominent veins; petiole ca. 1/4 as long as the blade, the wing acuminate-tapering toward the stem. Inflores- cence a series of few-headed cymules compounded into an open, terminal, paniculate to corymbiform cyme, usually subtended by prominent and distinct lateral cymes arising in the axils of the upper leaves. Heads campanulate, radiate but inconspicuously so; involucral bracts numerous, conspicuously imbricate in several series, acicular to long-lanceolate, glabrous or sometimes arachnoid tomentose among the outermost bracts, the inner and longest bracts often weakly reddish-margined, ca. 8 mm long in mature heads; receptacle paleaceous with irregular subulate awns 2 mm long or less; ray florets in 1-2 series, fertile, the
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Habit
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subshrub
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Description
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corolla yellowish, ca. 5 mm long, the tube splitting into a narrow ligule about mid-length, the ligule erect and about equalling the style; disc florets numerous, 50-60 (in well developed heads), the corollas thin, early deciduous. Achenes turbinate or weakly 5-angled, 1-2 mm long, lightly spreading-pubescent, especially on the angles; pappus straw-colored, uniseriate, capillary, 5-6 mm long.
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Note
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This species occurs on steep, forested slopes, at elevations of 1,000-2,000 m, but has occasionally been collected at lower elevations. It flowers mostly from January to April.
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Elevation
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1,000-2,000 m
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Specimen
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CHIRIQUI: Trail from Paso Ancho to Monte Lirio, 1500-2000 m, Allen 1587 (MO, NY, US). San Bartolo Limite, 20 km W of Puerto Armuelles, 400-600 m, Busey 555 (MO). 2 mi SW of Puerto Armuelles, 0-200 m, Croat 22042 (MO). Chiquero, 6000 ft, Davidson 561 (MO, US). El Boquete, 1000-1300 m, Maxon 5232 (US). Las Lagunas, 2 mi SW of El Volcan, 4200 ft, Tyson 853 (MO). NE of Cerro Pando, 1500 m, Wilbur et al. 11010 (MO, NY, US). COCLE: Cerro Pilon, 700-900 m, Duke 12068(3) (MO). El Valle de Anton, 1800, ft, Paul (Maurice 780) (US). Above Penonome, Williams 261 (NY).
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