494 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Costa Rica: Boruca, Tonduz 4460. Puerto Limon, Jiitchcock 8421. Llano 
Grande de Puriscal, Jiménez 881. Hacienda de Guécimo, Tonduz 27. San 
José, Prttier 1183. Echeverria, Pitter & Tonduz 2479. Carrillo, Biolley 
3107, Pittier 1182. Talamanca, Tonduz 8557. River Torres, San Francisco, 
Jiménez 126. Tuis, Tonduz 11396. 
Turrialba, Tonduz 4092, 8244. 
Buenos Aires, Tonduz 4042. Rio 
Tuis, Tonduz 8187. Boca Zhor- 
quin, Tonduz 8557. Quebrada de 
Tocori, Tonduz 7542. Santo Do- 
mingo de Golfo Dulce, Tonduz 
10099. Piedra del Convento, Pit- 
tier 3650. 
Panama: Boca del Toro, Hart 73. 
Fig. 69.—Distribution of P. polygonaiwm. Mount Hope, Hitchcock 9172. Be- 
tween Mindi and Colén, Hitchcock 
7943. Between Bohfo and Frijoles, Hitchcock 8395. Gorgona, Amer. Gr. 
Nat. Herb. 58. 
Triymwap: Arima, Hitchcock 10297, 10306. Cumuto Station, Hitchcock 10077. 
Port of Spain, Hitchcock 9953. Tabaquite, Hitchcock 10132. Caparo, Broad- 
way 2837. 
Topaco: Mason Hall, Broadway 4476. 
CotompBiA: Santa Marta, Smith 206, 2190, 2747. 
51. Panicum milleflorum sp. nov. 
DESCRIPTION. 
Plants perennial; culms ascending or erect from an elongated creeping base, rooting 
at the nodes, glabrous, 0.8 to 2 meters high, 4 to 5 mm. thick, compressed, the nodes 
pubescent or glabrous, usually with one to several long erect panicle-bearing branches; 
sheaths about as long as the internodes, keeled toward the summit, ciliate on the 
margin and puberulent at the junction with the blade, otherwise glabrous or sparsely 
papillose-hispid; ligule wanting, the ligular region puberulent; blades flat, 20 to 40 cm. 
long, 1 to 2 cm. wide, rarely wider, long-acuminate, somewhat narrowed to the sub- 
cordate base, glabrous or very sparsely hirsute, the margin scabrous; panicles 20 to 35 
em. long, about 6 cm. wide, in outline tapering to both ends, consisting 
of numerous ascending or spreading, often curving, slender spikelike 
branches, solitary or in fascicles along an elongated glabrous axis, the 
lower distant, the upper approximate, the scabrous-angled, often 
sparsely pilose rachises bearing throughout their length along their 
lower side evenly disposed short approximate densely flowered branch- 
lets, those of the lower branches sometimes as much as 15 mm.long, the Fie. 70.—P. 
others 1 or 2mm. long; spikelets subsessile, 1.3 mm. long, about 0.5 mm. cee aes 
wide, glabrous, the first glume about one-third the length of the spikelet, ae eee 
the second glume and sterile lemma equal, the lemma inflated boat- 
shaped with a large membranaceous palea; fruit 1.2 mm. long, 0.4 mm. wide, acute, 
the lemma boat-shaped. 
Type in the U. 8. National Herbarium, no. 693327, collected in water of swamp, 
Frijoles, Canal Zone, Panama, October 12, 1911, by A. 8. Hitchcock (no. 8387). 
This species differs from Panicum pilosum in its larger size, its strong decumbent 
rooting base, and its longer blades and panicles. It appears to be the same as Panicum 
distichum lancifolium Griseb.1 which was previously included? under P. pilosum. 
1 Fl]. Brit. W. Ind. 548. 1864. 2 Contr. U. S. Nat. Herb. 15: 114. 1910. 
