HITCHCOCK AND CHASE-—TROPICAL NORTH AMERICAN PANICUM, 485 
36. Panicum bulbosum H. B. K. 
Panicum bulbosum H. B. K. Nov. Gen. & Sp. 1: 99. 1816; Contr. U. 8. Nat. Herb. 
15: 81. 1910. 
DISTRIBUTION. 
Moist places in canyons and valleys, southwestern United States to southern Mexico. 
The type specimen from central Mexico. 
CuinuaHuA: Candelaria, Stearns 266. Chihuahua, Pringle 377. Colonia Garcfa, 
Nelson 6187, Townsend & Barber 221. Sierra Madre, Nelson 6301. Mount 
Mohinora, Nelson 4901. Cafion de San Diego, Hartman 790. 
Duranco: Otfnapa, Palmer 340 in 1906. Durango, Palmer 525a in 1896. With- 
out locality, Palmer 741 in 1896. 
Teric: Between Aguacate and Dolores, 
Rose 3361. Between Pedro Paulo 
and San Blasito, Rose 1999. 
San Luis Porosf: San Luis Potosf, 
Parry & Palmer 958. Las Canoas, 
Hitchcock 5754. 
Jauisco: Road between Mexquiticand — |- 
Monte Escobedo, Rose 2609. Ne- 
vada de Colima, Hitchcock 7150. 
Rio Blanco, Palmer 207 in 1886. 
Micuoacdn: Morelia, Arséne in 1909. Fia. 49.—Distribution of P. bulbosum. 
Mexico: Federal District, Orcutt 3518, 
Hitchcock 5932, 5941, 7835, Amer. Gr. Nat. Herb. 39, Holway 12, Bourgeau 
235, Rose & Painter 9249, Pringle 9575, 6418. Valley of Toluca, Pringle 5207. 
Puesta: Chinantla, Liebmann 441, 442. Cerro de Baxtla, Purpus 2908. Espe- 
ranza, Seaton 317. Bords de l’Atoyac, Nicolas in 1909. 
Veracruz: Borrego, Bourgeau 2754. Orizaba, Hitchcock 6384. 
Oaxaca: Oaxaca, Nelson 1374. Cerro de San Felipe, Conzatti & Gonzdlez 243. 
36a. Panicum bulbosum sciaphilum (Rupr.) Hitchc. & Chase. 
Panicum bulbosum sciaphilum (Rupr.) Hitche. & Chase, Contr. U. 8. Nat. Herb. 
15: 83. 1910. 
DISTRIBUTION. 
Gravelly river banks, southwestern United 
States to central Mexico, The type spec- 
imen from central Mexico. 
Sonora: Nogales to Cocospora Ranch, 
Griffiths 6785}. 
CurmuaHuA: Cusihuiriachic, Pringle 
1406. Sierra Madre, Nelson 6298. 
Sanchez, Hitchcock 7666. 
Fie. 50.—Distribution of P. bulbosum Duraneo: Tejamén, Palmer469 in 1906. 
sciaphilum. Otinapa, Palmer 348, 349, and 554 
in 1906. Santiago Papasquiaro, Palmer 467 in 1896. Iron Mountain, Hitch- 
cock 7634. 
Trric: Between Dolores and Santa Gertrudis, Rose 2053. 
México: Barranca de Rio Aqueducto, Rose & Painter 8634. 
