133 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 linden Griseb. Cat. Pl. Cub. 233. 1866. Based on “P. obtusiflorum 
Rich. Cub. non Hochst. [1851]; Lind[en]. 2143.” 
DESCRIPTION. eK 
i 
Plants perennial, somewhat glaucous; culms erect from a geniculate or decumbent 
base, often rooting at the lower nodes, | to 2 meters high, robust, compressed, glabrous; 
sheaths often longer than the internodes, somewhat keeled, especially the lower, 
glabrous or sometimes ptlose, 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 
Fig. 132—P. glutinosum. From type branches glabrous, sometimes viscid, bearded 
‘ specimen. in the axils, bearing slender, flexuous, sca- 
brous branchlets, with rather long-pediceled 
spikelets, mostly along the upper half; spikelets 3mm. 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. 
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: Cafias Gordas, Pittier 11017; Diquis Valley, Pittier 12002. 
Cusa: Loma Pelada, Wright 757. 
Jamaica: Gordon Town, Hart 792; Troy, Mazon 2816. 
Porto Rico: Mayaguez, Sintenis 357; Sierra de Yabucos, Sintenis 2609. 
Braziu: Prov. Minas Geraes, Widgren in 1845, Regnell III 1370; Sao Paulo, 
Lofgren 2291, Lofgren & Edwall 2383; Campinas, Novaes 1247. 
Paracuay: Central Paraguay, Morong 405 A. 
Boutvia: Mapiri, Rusby 244. 
