Notes on genera of Paniceae : I-IV . inrolled; grain dorsally subcompressed, enclosed in the lemma and palea; staminate spikelets readily deciduous,much smaller than the pistillate, narrowly lanceolate, glumes and sterilelemma wanting, lemma and palea thin membranaceous, the lemma 3-,the palea 2-nerved. Woody, bamboo-like perennials with ample bladesabruptly narrowed into petiole-like bases, convolute in the bud beforeexpanding, the consequent creases permanent and conspicuous in themature blades. Species about twenty, confined to the tropics and sub-tropics of America except a form of 0. lati
Notes on genera of Paniceae : I-IV . inrolled; grain dorsally subcompressed, enclosed in the lemma and palea; staminate spikelets readily deciduous,much smaller than the pistillate, narrowly lanceolate, glumes and sterilelemma wanting, lemma and palea thin membranaceous, the lemma 3-,the palea 2-nerved. Woody, bamboo-like perennials with ample bladesabruptly narrowed into petiole-like bases, convolute in the bud beforeexpanding, the consequent creases permanent and conspicuous in themature blades. Species about twenty, confined to the tropics and sub-tropics of America except a form of 0. latifolia L. or a close ally which isfound in South Africa, and a form distantly related to 0. micranthaH. B. K. in the Fiji known species fall into three rather well-marked groups. 1. Panicle branches with elliptical or lanceolate, setaceous-pointed, pis-tillate spikelets above, staminate spikelets below ; glumes glabrous ornearly 178 Chase—Notes on Genera of Fanicem. III. * Fruit smooth and shining, not pitted. LATIFOLIA L., CAPILLATA Trill., CAUDATA Trill., CORDIFOLIA H. B. K., pubescens Radd., scabra Nees. ** Fruit not pitted, clothed with thick silky hairs at base and sum-mit, on margins or glaberrima Radd., Radd., semiovata Trin., andthe following: Olyra yucatana Panicles contracted, often a second one from the upper sheath, 8-15 2 cm. wide, axis and rachis scabrous; staminate spikelets on thelower branches and lower part of upper pistillate branches, 8 mm. longincluding the setaceous tip of the lemma, pa lea about 2 mm. shorter;pistillate spikelets 15 to 17 nun. long, the glume and sterile lemma scab-rous, 7-nerved, 8 nun. long, and acuminate into rlexuous setaceous tipsas Long again in the glume, half as long in the sterile lemma; fruit ellip-tical, obscurely pointed, 7 nun. long, 4 mm. wide, white and shining orold ivory toward maturity, the lemma silky-pubesc
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