138 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



79. Panicum glutinosum Swartz. 



Panicum glutinosum Swartz, Prodr. Veg. Ind. Occ. 24. 1788. "Jamaica." The 

 type is in the Swartz Herbarium. 



Panicum obtusiflorum Rich, in Sagra, Hist. Cuba 11: 305. 1850. "Crescit ad 

 marginem rivuli Cauta in provincia Santiago de Cuba. (Linden, n. 2143.) " The type, 

 in the Richard Herbarium, is labeled "St. Yago de Cuba. Linden 2143. " 



Panicum lindenii Griseb. Cat. PI. Cub. 233. 1866. Based on "P. obtusiflorum 

 Rich. Cub. non Hochst. [1851]; Lind[en]. 2143." 



DESCRIPTION. 



Plants perennial, somewhat glaucous; culms erect from a geniculate or decumbent 

 base, often rooting at the lower nodes, 1 to 2 meters high, robust, compressed, glabrous; 

 sheaths often longer than the internodes, somewhat keeled, especially the lower, 



glabrous or sometimes pilose, densely bearded 

 at the juncture with the blade; ligules obso- 

 lete; blades elongated-lanceolate, acuminate, 

 15 to 50 cm. long, 15 to 25 mm. wide (the up- 

 permost reduced), abruptly or gradually nar- 

 rowed at the base, more or less ciliate along 

 the lower portion, glabrous or sometimes very 

 sparsely pilose; panicles rhomboid in outline, 

 15 to 30 cm. long, about as wide, the lower 

 branches verticillate, nearly as long as the 

 main axis, stiffly ascending, the axis and 

 branches glabrous, sometimes viscid, bearded 

 in the axils, bearing slender, flexuous, sca- 

 brous branchlets, with rather long-pediceled 

 spikelets, mostly along the upper half; spikelets 3 mm. long, 1.5 to 2 mm. wide, turgid, 

 obovoid, obtuse, olivaceous to brown, the faintly nerved, very viscid glumes whitish 

 on the margin; first and second glumes about equal, slightly shorter than the fruit, 

 the sterile 'lemma thinner in texture, mostly entirely concealed beneath the first 

 glume, sterile palea wanting; fruit 2.6 mm. long, 1.2 to 1.5 mm. wide, obovoid- 

 elliptic, olive-brown, densely minutely puberulent at the summit, otherwise smooth 

 and shining, the margins of the lemma toward the summit scarcely inrolled. 



Fig. 132.— P. 



glutinosum. 

 specimen. 



From type 



DISTRIBUTION. 



Mountain woods, Mexico and the West Indies, south to Paraguay and Bolivia. 

 Mexico: Zacualpan, Purpus 2156, 2903; Mirador, Liebmann 428; San Cristobal, 



Bourgeau 3192; Orizaba, Botteri; State of Chiapas, Nelson 3357. 

 Costa Rica: Canas Gordas, Pittier 11017; Diquis Valley, Pittier 12002. 

 Cuba: Loma Pelada, Wright 757. 

 Jamaica: Gordon Town, Hart 792; Troy, Maxon 2816. 

 Porto Rico: Mayaguez, Sintenis 357; Sierra de Yabucos, Sintenis 2609. 

 Brazil: Prov. Minas Geraes, Widgren in 1845, Regnell III 1370; Sao Paulo, 



Ldfgren 2291, Lofgren & Edwall 2383; Campinas, Novaes 1247. 

 Paraguay: Central Paraguay, Morong 405 A. 

 Bolivia: Mapiri, Rusby 244. 



