472 



CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



Jamaica: Black River, Hitchcock 9630. Hope Gardens, Amer. Gr. Nat. Herb. 10, 



11, Harris 11247. Kingston, Hitchcock 9750. Alligator Pond, Hitchcock 9830. 



Gordon Town, Harris 11343, 11512. Yallahs Valley, Harris 11498. 

 Haiti: Gonaives, Buch 23. 

 Santo Domingo: Barahona, Fuertes 43. 

 Porto Rico: Between Coamo and Aibonito, Sintenis 1957, Chase 6333. Joyuda, 



Chase 6302. Guanica, Chase 6514. Mayaguez, Chase 6286. Bayamon, 



Hioram 315. Vieques, C/jase 6686. 

 ■Danish West Indies: St. Croix, Eggers in 1876, Ricksecker 66, 384. 

 Leeward Islands: Antigua, Wullschlaegel 615, 616. Guadeloupe, Ditss 3180. 



Saba, Boldingh 1583 (K. U. Herb.). St. Eustatius, Suringar in 1885 (K. U. 



Herb.). St. Bartholomew, Goes (K. U. Herb.). 

 Windward Islands: Duss 537b (K. U. Herb.). 



12. Panicum arizonicvim Scribn. & Merr. 



Panicum arizonicum Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Circ. 32: 2. 1901; 

 Contr. U. S. Nat. Herb. 15: 44. 1910. 



distribution. 



Open sandy or stony ground, southwestern United States and northern Mexico. 

 The type specimen from Arizona. 



Lower California: Arroyo San Lazaro, Brandegee in 1902. San Jose del Cabo, 



Brandegee in 1890. 



Sonora: Nogales, Griffiths 6747, 6759, 

 Hitchcock 3637. Lokuka Ranch to Al- 

 tar, Griffiths 6891. Guaymas, Palmer 

 159 and 208 in 1887. Hitchcock 3562. 

 Hermosillo, Hitchcock 3542. 



Chihuahua: Norogachi, Palmer IB in 

 1885. Chihuahua, Pringle 487. 



Sinaloa: Topolobampo, Palmer 250 in 

 1897. 



DuRANGo: Without locality, Rose 2280. 



Guerrero: Rio Balsas, Orcutt 4195. Bal- 

 sas, Hitchcock 6775. 

 Oaxaca: Tomellin, Hitchcock 6192, Amer. Gr. Nat. Herb. 13. 



Fig. 23.— Distribution of P. arizonicum. 



13. Panicum texanum Buckl. 



Panicum texanum Buckl. Prel. Rep. Geol. 

 Agr. Surv. Tex. App. 3. 1866; Contr. V. S. 

 Nat. Herb. 15: 46. 1910. 



distribution. 



Prairies and open ground, often a weed in 

 fields, Texas and northern Mexico. The 

 type specimen from Texas. 



Nuevo Leon: Monterrey, Hitchcock 

 5540. 



Fig. 24.— Distritoutioii of P. texanum. 



