178 Chase — Notes on Genera of Paniceae. III. 



* Fruit smooth and shining, not pitted. 



OLYRA I.ATII'OI.IA L., CAPILLATA Trill., CATOATA Trill., CORDIFOLIA 



II. 15. K., pubescens Radd., scabra Nees. 



* * Fruit not pitted, clothed with thick silky hairs at base and sum- 

 mit, on margins or hark. 

 Olyra glaberrima Radd., cii.iATiFouA Radd., semiovata Triii., and 

 the following: 



Olyra yucatana 



Panicles contracted, often a second one from the upper sheath, 8-15 cm. 

 long, 2 cm. wide, axis and rachis scabrous; staminate spikelets on the 

 lower branches and lower part of upper pistillate branches, 8 mm. long 

 including the setaceous tip of the lemma, palea about 2 mm. shorter; 

 pistillate spikelets L5 to 17 mm. long, the glume and sterile lemma scab- 

 rous, 7-nerved, 8 mm. long, and acuminate into flexuous setaceous tips 

 as 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 or 

 old ivory toward maturity, the lemma silky-pubescent at base and on the 

 margins. Culms tall, slender; sheaths mostly longer than the internodes, 

 crisp-puberulent, blades 13 to 16 cm. long, one-third as wide, abruptly 

 acuminate at the apex, trapezoid-truncate at base. Known only from 

 Yucatan. 



This species was described and figured by Millspaugh & Chase (1903, 

 Field Col. Mus. Bot. '.', : 46) under the name Olyra semiovata Trin. The 

 examination of Trinius' type has shown this disposition of the Yucatan 

 form to be erroneous. Type Gaumer 2372, No. 125941 Herb. Field Colum- 

 bian Museum. "Common at Chichankanab, Gaumer 1389, Pocoboch, 

 Gaumer 2372." 



* * * Fruits jutted. 



Olyra i \\s< kti.ata Trin., filiformis Trin., heliconia Lindni. (PI. 

 Bolivianae, a Miguel Pang lectae no. 508, distributed as 0. latifolia be- 

 longs to the latter species.) 



i'. Vpper panicle branches with globose, hispid-bristly, setaceous-pointed, 

 pistillate spikelets only; lower brandies with staminate spikelets 

 only ; fruit }>itted. 

 Olyra micrantha II. B. K., hirsuta Trin., vextkr-osa Nees. A speci- 

 men from " l'Yejee Islands, Sandalwood Bay " collected on the Wilkes 

 expedition 1838-42 belongs in this group. 



'■). Upper panicle branches "'/'/// oval pistillate spikelets, not pointed, 

 fruit smooth. 



Olyra ua.mosissima Trin., Panicum laterals Presl and probably 0. sar- 

 mkntosa Doell, form a third group wilb unpointed pistillate spikelets on 

 pedicels scarcely cla\ ate, glabrousand uupitted fruit; slender-stemmed freely 

 branching plants with blades and panicles scarcely exceeding 5 cm. long. 



