86 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



about one-fifth as long as the spikelet, broad, loose and truncate, obscurely nerved; 

 second glume and sterile lemma equal, 5 to 7-nerved; fruit 1.8 to 1.9 mm. long, 

 about 1 mm. wide, obovate-elliptic. 



DISTRIBUTION. 



Sea beaches, extensively creeping and acting as a sandbinder, along the Gulf Coast, 

 Alabama to Louisiana, native to trop- 

 ical and subtropical coasts of both 

 hemispheres. 



Alabama: Mobile, Curtiss 6513, 

 Kearney 17, Mohrin 1876, 1877, 

 and 1882. 

 Mississippi: Biloxi, Chase 4377, 

 Kearney 342, Pollard 1152; 

 Horn Island, Tracy 3861; 

 Ocean Springs, Tracy 38; Deer 

 Island, Tracy in 1898. 

 Louisiana: Cameron, Cocks 2186, 

 Baton Rouge (in rice fields 

 along the Mississippi River), Fulton in 1907; Plaquemines County, Langlois 

 in 1882; Pointe a la Hache, Langlois in 1884. 

 Nicaragua: Flint in 1868. 

 Cuba: Habana, Leon 296, 563. 

 Brazil: Itajahy, TJle 567. 



Fig. 76.— Distribution of P. repens. 



43. Panicum gouini Fourn. 



Panicum gouini Fourn. Mex. PI. 2 : 28. 1886. This name was earlier listed without 

 description by Hemsley. a Fournier cites "Vera Cruz (Gouin n. 4, julio)." The 

 type specimen is in the Paris Herbarium. 



Panicum gouini pumilum Fourn. Mex. PI. 2 : 28. 1886. This name was earlier listed 

 without description by Hemsley. a Fournier cites two specimens as follows: "Vera 

 Cruz (VirlJet] n. 1300); Antigua in pratis humidis (Liebm[ann] n. 450)." The first 

 could not be found; the second, in the Copenhagen Herbarium, is labeled "Panicum 

 Gouini Fourn." in Fournier's writing. It consists of six small plants of this species. 

 A specimen of this number in the United States National Herbarium, also labeled 

 in Fournier's hand, is also this species. 

 Panicum repens confertum Vasey, Bull. Torrey Club 13: 25. 1886. "Collected in 



Louisiana by A. B. Langlois." The type, in the 

 National Herbarium, was collected "In sandy beach 

 of Gulf, B[ay] St. Louis, Miss., 13 Sept., 1883," the 

 published locality being an error, doubtless due to 

 the fact that the printed label bears Langlois 's home 

 address, "Pointe-a-la-Hache, La.," the written 

 locality being overlooked. 



Panicum halophilum Nash in Lloyd & Tracy, 

 Bull. Torrey Club 28: 86. 1901. Based on "P. 

 repens L. var. confevtum Vasey, not P. confertum 

 Desv. 1816." A description is given and one 

 specimen cited, Petit Bois Island, Miss., Tracy 4566. 



Fig. 77.— P. gouini. From type 

 specimen. 



a Biol. Centr. Amer. Bot. 3: 489. 1885. 



