BOTANY. 21 



CoMMELTNA EKECTA, Linn.; Ell. Sk. l,p. 48. Los Playas; August. The specimens agree in 

 almost every particular with Elliott's description, (1. c.,) except that the larger petaloid sepals 

 are reniform rather than cordate. The small inner sepal is lanceolate, and placed between the 

 two connate exterior sepals. 



Phalaris arundinacea, Linn.; Torr. Fl. Neio York, 2, p. 418. On the Gila ; June. 



Paspalum DiSTicnuM, Li7in. ? Ell. Sk. I, p. 108. Banks of the San Pedro of the Gila ; July. 

 Widely spread over the warmer parts of North America. P. vaginatum, Swartz, seems to be 

 hardly distinct from this species. 



Panicum lachnanthum (n. sp.) : culm ascending, and with the leaves glabrous ; panicle 

 oblong, erect, the branches alternate and loosely racemose; all the spikelets ped icellate, oblong ; 

 inferior glume very short, glabrous ; the superior and the inferior palea of the abortive flower 

 much attenuate, and somewhat awned at the tip, densely covered with very long white silky 

 hairs ; perfect flower ovate-lanceolate acuminate, and mucronate, glabrous, finely striate and 

 dotted longitudinally. Paspalum sericeum, Scheele, in Linncea, 23, p. 341? On the Burro 

 mountains; August. Plant about 18 inches long; the panicle 3-6 inches. A very remarkable 

 species. 



Setaria viridis, Beauv.; Kunth, Enum. 1, p. 151. Pennisetum viride, B. Br. Burro 

 mountains ; August. 



Gastridium australe, Beauv.; Steudel Gram. p. 185. Milium lendigerum, Linn. San Jose 

 valley ; November. This has not before been noticed as a North American plant. Steudel 

 states that it has been found in Chili. It is a common grass in southern Europe. Yery prob- 

 ably it has been brought to America in grain. 



Sporobolus airoides. Agrostis airoides, Torr. in Ann. Lye. N. York, 2, p. 151. A. (Sporo- 

 bolus) airoides, Torr. in Marcy's Be}), p. 30. Valley of the Mimbres; August. 



PoA annua, Linn.; Kunth, Enum. 1, p. 349. Banks of the Salinas river; November. This 

 little grass has become quite extensively naturalized in California. 



Poa compressa, Linn.; Kunth, Enum. 1, p>- 355. Los Angeles ; March. A slender form, 

 with a loose, open panicle. 



Uniola spicata, Linn. Brizopyrum spicatum. Hook. & Am. Fl. Bor.-Amer. 2, p. 254, 

 excl. the synonyms of Uniola stricta, Torr., and U. multiflora, Nutt. San Felipe. It is found 

 also in Oregon, and is in all essential characters like the plant of the Atlantic States. 



Avena fatua, Linn.; Kunth, Enum. 1, p. 302. Abundant in various parts of California, 

 being the common wild oat of that country. 



Andropogon nutans, Linn.; Kunth, Enum. 1, p. 504. Sorghum nutans, Gray, Man. ed. 2. 

 On the river Mimbres ; August. 



PoLYPODiuM INTERMEDIUM, Hook. & Am. Bot. Beechcy, p. 405 ; Hook. Fl. Bor.-Amer. 2, p. 

 258. Santa Inez, and plains of the Salinas. 



Adiantum Chilense, Kaulf. Fil. p. 207 ; Hook, and Grev. Ic. Fit. t. 183. Shore of Santa 

 Inez and Santa Barbara. Some of our botanists have named this A. tenerum. It is common in 

 California and New Mexico. 



AspiDiuM ARGUTUM, Kaulf. Enum. Fil. p. 242. Temecula Hill, and valley of the Salinas, 

 California. 



Pteris lanuginosa, Kaulf. Enum. Fil. p. 189; Hook, and Am. Bot. Beechey,p. 405. Valley 

 of the Salinas. 



