HITCHCOCK AND CHASE—TROPICAL NORTH AMERICAN PANICUM. 483 
Panama: Between Bohio and Frijoles, Hitchcock 8397. Near Bohfo, Hitchcock 
8392. Tabernilla, Hitchcock 8382. Gorgona, Amer. Gr. Nat. Herb. 37. Pedro 
Miguel, Hitchcock 7957. Puerto 
Obaldfa, Pittier 4374. Culebra, 
Pittier 3441. 
Cusa: Matanzas, Wright in 1865. 
Guantinamo, Ledn 3913. 
LEEWARD IsLANDs: Guadeloupe, 
Duss 3917. 
WINDWARD IsLANDs: Martinique, 
Duss 768 (K. U. Herb.). 
TriInIDAD: St. Margaritas, Broad- 
way 2629. “ Burke’s pasture,”’ Fic. 46.—Distribution of P. hirsutum. 
Bot. Gard. Herb. 2295. 
VENEZUELA: Rfo Grande del Tuy, Paparo, Pittier 6332. Bobures, Jahn 353, 355. 
CoLomBIA: Santa Marta, Smith 164. 
MAXIMA. 
Culms with a cormlike base. 
Blades mostly over 5 mm. wide; culms more than 1 meter 
high. ...... 22... 20.02 e eee eee eee cee ee eee eee ences 36. P. bulbosum. 
Blades less than 5 mm. wide; culms rarely as much as 1 meter 
high....... 22.22.2022. 22222 eee eee eee 36a. P. bulbosum 
sciaphilum. 
Culms from a creeping rootstock, not cormlike at base. 
Nodes hirsute; ligules 4 to 6 mm. long; fruit strongly rugose....34. P. maximum. 
Nodes glabrous; ligules 2 mm. long; fruit very obscurely 
TUQOSC. 02.2 eee ee eee eee eee eee 35. P. plenum. 
34. Panicum maximum Jacq. 
Panicum maximum Jacq. Coll. Bot. 1: 76. 1786; Contr. U. 8. Nat. Herb. 15:78. 1910. 
DISTRIBUTION. 
Open ground, at low altitudes, escaped from cultivation, southern Florida through 
Mexico and West Indies to South America, a native of Africa and now widespread 
in the warmer parts of the Old World. Type locality, Guadeloupe. 
StnaLoa: Mazatlin, Rose, Standley & Russell 14121. 
Couma: Paso del Rfo, Emrick 3. 
Veracruz: Cérdoba, Hitchcock 6410, Finck 8, Kerber 48. Jalapa, Hitchcock 
6621. Huitamalco, Liebmann 425 
in part. Veracruz, Hitchcock 6562. 
San Francisco, Smith 1409. Zacu- 
sapdn, Purpus 3774. 
YucaTAN: Izamal, Gauwmer 719. 
British Honpuras: Manatee Lagoon, 
Peck 195 (Gray. Herb.). 
GUATEMALA: Escuintla, Smith 2705, 
2706, Hitchcock 9001. Morales, Kel- 
lerman 6267. Gualdn, Deam 6268. 
Fig. 47.—Distribution of P, mazimum. Finca Sepacuité, Alta Verapaz, 
Cook & Griggs 579. 
Honpvuras: Puerto Cortez, Kellerman 4725. 
SaLvapor: San Salvador, Velasco 2. Izalco, Pittier 1960. Without locality, 
Renson 293. 
