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(Last Modified On 6/4/2013)
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(Last Modified On 6/4/2013)
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Species
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Austroeupatorium inulaefolium (H.B.K.) R. M. King & H. Robinson
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PlaceOfPublication
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Phytologia 19: 434. 1970
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Synonym
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Eupatorium inulaefolium H.B.K., Nov. Gen. Sp. P1. 4: 85. ed. fol. 1818. TYPE: Colombia, near Mariquita, Humboldt & Bonpiand (P, not seen, US, photo). Eupatorium molle H.B.K., Nov. Gen. Sp. P1. 4: 85. ed. fol. 1818. TYPE: Colombia, near Mariquita, Humboldt & Bonpland (P, not seen, US, microfiche). Eupatorium suaveolens H.B.K., Nov. Gen. Sp. P1. 4: 86. ed. fol. 18,18. TYPE: Colombia, near Sant-Anna, Mariquita and Ibague, Humboldt & Bonpland (P, not seen, US, microfiche). Eupatorium paranense Hook. & Am., Companion Bot. Mag. 1: 241. 1836. SYNTYPES: Brasil, Parana6, Tweedie. Argentina, Buenos Aires, Tweedie (both K, not seen). Eupatorium pallidum Hook. & Am., Companion Bot. Mag. 1: 241. 1836. SYNTYPES: Argentina, Buenos Aires, Tweedie. Argentina, San Isedro, Tweedie (both K, not seen). Eupatorium pallescens DC., Prodr. 5: 154. 1836. TYPE: Brasil, Minas Geraes, Vauthier 273 (G-DC, not seen, US, photo). Eupatorium decemflorum DC., Prodr. 5: 154. 1836. TYPE: Peru, Poeppig (G-DC, not seen, US, microfiche). Eupatorium silphiifolium Mart., Flora 20, Beibl. 2: 105. 1838. TYPE: Brasil, Rio de Janeiro, Martius herb. no. 140 (NY). Eupatorium ramosissimum Gardn., London Jour. Bot. 6: 441. 1847. TYPE: Brasil, margins of woods near Villa de Arrayas, Goyaz, Gardner 4206 (BM, not seen). Eupatorium horsfieldii Mig., FL. Bat. 2027. 1856. TYPE: Java, Horsfield (U, photo US). Eupatorium cinereum Griseb., Fl. Brit. W. Ind. 359. 1861. TYPE: Trinidad, Crueger (GOET, not seen; K, not seen).
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Description
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Erect perennial herbs or subshrubs to 3 m tall, with few branches; stems brownish, terete, slightly striate, densely puberulous to tomentulose. Leaves mostly opposite; blades narrowly ovate to lanceolate, to 15 cm long and 6 cm wide, the base rounded to cuneate and abruptly narrowed, the margins slightly serrulate to crenate-serrate, the apex narrowly acuminate, the upper surface smooth to slightly bullate, sparsely to densely puberulous, the lower surface densely puberulous to tomentellous with numerous glandular punctations, the venation prominently trinervate from near the base; petioles short, to 15 mm long, becoming winged distally. Inflorescence broadly and densely corymbose, the ultimate branches short and tomentellous, to 3 mm long. Heads 6-7 mm high with 8-15 florets; involucral bracts 12-15, subimbricate, in ca. 3 series, suborbicular to broadly oblong, 1.5-6.0 mm long, short-acute to rounded with scarious tips and margins, weakly 2-4 costate, the exposed outer surfaces puberulous; corolla white, 4.0-4.5 mm long, the slender tube ca. 1.5 mm long, some glands on tube and lobes, the lobes short, about as broad as long, sometimes with 1-2 small hairs. Achenes 1.8-2.0 mm long, glabrous or with a few glands; carpopodium short and broad, the cells large and thin-walled in ca. 7 rows; pappus of 30-40 slender bristles, 3.5-4.0 mm long, the apical cells blunt, not broadened. Pollen 18-20 ,u in diameter.
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Habit
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herbs or subshrubs
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Distribution
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reported from Panama but it is widely distributed in South America and is adventive in the Eastern Hemisphere in Indonesia and Ceylon.
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Note
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One of the distinctive characters of the species is the very large, broad carpopodium with large, thin-walled cells. A few species of South America, A. mapiretnse (IHieron.) R. NI. King & H. Robinson and A. monardifolium (Uslp.) R. XI. King & H. Robinson, seem very close but reportedly differ by the under surface of the leaves being very short-puberulous or nearly glabrous between the vein reticulations.
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Specimen
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PANAMA: 1 mi W from Su-Lin Motel along dirt road to Cerro Campana, Correa & Dressler 366 (MO). Roadside on way to Cerro Campana, Croat 12021 (MO). SW facing slopes of mts. E of Chica, King 5266 (US).
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