508 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
DISTRIBUTION. 
Swamps and wet savannas, British 
Honduras and Trinidad to Brazil. 
British Honpuras: Manatee La- 
goon, Peck 271 (Gray Herb.). 
TRINIDAD: PiarcoSavanna, Hitch- 
cock 10349, 10354, 10364. Cu- 
muto Station, Hitchcock 10067. 
Aripo Savanna, Broadway 
Fig. 94.—Distribution of P. cyanescens. 2377 
UNGROUPED SPECIES OF TRUE PANICUM. 
71. Panicum pyrularium sp. nov. 
Plants annual; culms delicate, 10 to 13 cm. high, at first erect and simple, finally 
decumbent and branching, often rooting at the nodes, more or less zigzag, sometimes 
elongating to 25 or 30 cm.; nodes sparsely pilose or glabrous; sheaths shorter than the 
blades, glabrous or spores pilose; ligule membranaceous, about 0.5 mm. long; blades 
thin, flat, spreading, 1 to 3 cm. long, 2 to 7 mm. wide (the lower sometimes smaller), 
narrowly elliptical, somewhat clasping at base, obtuse or acutish at the apex, scabrous 
on the margins, glabrous or sparsely pilose on both surfaces, sometimes glaucous; 
panicles terminating the culm and branches, loose and open, 2 to 5 
cm. long, about as wide, oval or pyramidal in outline, the delicate 
flexuous branches and branchlets spreading or reflexed, smooth, 
the capillary divaricate pedicels several times longer than the 
spikelets; spikelets 1.5 mm. long, 0.6 mm. wide, turgid, pyriform, 
long-attenuate at base, glabrous; first glume about half as long as 
the spikelet, acute; second glume and sterile lemma 5-nerved, not 
exceeding the fruit, the glume slightly shorter than the sterile FI: %—P- pyru- 
lemma; fruit 1 mm. long, 0.5 mm. wide, turgid. oe aoe 
Type in the U. 8. National Herbarium, no. 715639, collected 
between Hato del Jobo and Cerro Vaca, eastern Chiriqui, Panama, altitude 700 to 
1,000 meters, December 25 to 28, 1911, by H. Pittier (no. 5416). 
Panicum pyrularium, one of the smallest and most delicate species in the genus, is 
not related to any North American species. 
The South American Panicum polycomum Trin. is an allied species of more tufted 
habit, with much narrower blades, smaller panicles, and smaller pubescent spikelets 
not attenuate at base. 
None of the labels with the specimens cited below indicates the habitat. 
DISTRIBUTION. 
Panama to Venezuela. 
Panama: Between Hato del Jobo 
and Cerro Vaca, Chiriquf, 
Pittier 5416. - 
/Wexezorta: Tovar, Fendler 2502. 
/ Corompra: Santa Marta, Smith — 
2570. Without locality, Tiv- 
ana 281 (28117). 
Fic. 96.—Distribution of P. pyrularium. 
a a 
wt 
