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(Last Modified On 11/6/2013)
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Species
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Ichnanthus procurrens (Nees ex Trin.) Swallen
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PlaceOfPublication
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Phytologia 11: 149. 1964.
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Synonym
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Pani- cum procurrens Nees ex Trin., Gram. Panic. 183. 1826. Echinolaena procurrens (Nees ex Trin.) Kunth, Revis. Gramin. 1: 54. 1829. TYPE: Brazil. Minas Gerais: "in campis glar- eosis," Langsdorf s.n. (holotype, LE not seen, fragment, US ex LE).
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Distribution
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Brazil
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Description
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Perennial; caespitose; culms procumbent, rarely decumbent and rooting at lower nodes, branching extravaginally at base; 30-120 cm tall, internodes 0.7-2.0 mm diam., hollow, glabrous, purple, red- dish, or green. Leaves cauline; sheaths longer than the internodes below, shorter above, rounded on the back, strongly nerved, midrib often conspicuous, truncate at apex, glabrous to pilose, the margins ciliate; ligule a row of stiff trichomes 0.3-0.6 mm long; blades ovate-lanceolate to lanceolate, 30-60(- 80) mm long, 2.0-16 mm wide (length: width ratio 3.1-17.8: 1), cordate at base, flat, strongly scleri- fied, 100-170 um thick, glabrous to pilose, midrib indistinct except at the base on abaxial and adaxial surfaces, margins with a conspicuous, sclerified, sca- brous nerve 0.18-0.35 mm wide. Inflorescence a panicle with 5-28 alternate racemes, the terminal panicle 35-150 mm long, the secondary panicles 2-50 mm long; rachis hirsute, the white hairs 0.7- 1.2 mm long; racemes glabrous, 15-70 mm long, with 2-7 pairs of spikelets on hirsute pedicels 1-6 mm long and a single, terminal spikelet on a glabrous pedicel 6-14 mm long. Spikelets 3-4.5 mm long, ovate-lanceolate, outer bracts laterally compressed, upper floret dorsally compressed; lower glume /2 to as long as the spikelet, triangular, clasping spikelet at the base, acuminate, chartaceous, 3-nerved, the nerves distinct, pilose to hispid, trichomes 0.5-3 mm long; upper glume as long as the spikelet, lan- ceolate, blunt to acute, 5-nerved, pubescent but less so than the lower glume; lower floret staminate, lower lemma similar to the upper glume, palea hy- aline, 2.7 mm long, anthers 3, 1.5-1.8 mm long; upper floret bisexual, 2-2.7 mm long, lemma ellip- tical, acute, coriaceous, pale green, shining, gla- brous, margins flat, the base with 2 inconspicuous, marginal scars 0.2 mm long, indistinct, connate to an abaxial indurated ridge; palea similar in texture to the lemma; anthers 1.5-1.8 mm long, purple; styles 2, stigmas plumose, purple, exserted during anthesis; caryopsis 1.5 mm long, 0.6 mm wide, ellipsoidal, tan.
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