OF ARTS AND SCIENCES. 79 



thin laminne between the principal veins : filaments 6, naked, scabrous, 

 free from near the top of the tube and nearly equalling the corolla ; 

 anthers basifixed, linear, Ij lines long : capsule equalling the peri- 

 anth, ovate, narrowed to a short stipe, the cells 2-seeded. — Of the 

 Seuhertia section, though with the basifixed anthers of Eahrodicea. 

 Abundant in low places on the sandy plains about Los Angeles Bay. 

 (596.) 



"Washingtonia Sonor^. a tree reaching 25 feet in height and 

 a foot in diameter : leaves 3 or 4 feet in diameter, somewhat glaucous, 

 very filiferous, upon rather slender petioles which are armed with stout 

 curved spines : spadix slender, 5 or 6 feet long : fruit about 3 lines 

 Ions, the flattened-wlobose seed 2 to 2J- lines in the lonsjest diameter. — 

 Apparently distinct from W. jUlfera and W. rohusta in its more slender 

 petioles, more glaucous leaves, and smaller fruit. The seeds are used 

 for food by the Indians. It may here be noted that in the " Genera 

 Plantarum " the genus Washingtonia is placed in the group having 

 basilar styles, though it is correctly described as having the style ter- 

 minal. In secluded canons in the mountains about Guaymas. (311.) 



PoTAMOGETON PECTiNATUS, Linn. " Grama " ; used in decoction 

 " to purify the blood." In a small lake near Muleje. (23.) 



Naias major, All. " Saragossa." Abundant in a shallow lake 

 near Muleje. (20.) 



JuNCUS* ROBUSTUS, "Watson. In brackish water. Muleje. (34.) 

 Ctperus speciosus, Vahl. Margin of a fresh- water lake near 

 Muleje (36), and high in the mountains above Guaymas (640). — 

 C. L^viGATUS, Linn. Near Muleje and at Los Angeles Bay. (39, 

 509.) — C. aristatus, Rottb. At Guaymas, near the harbor and also 

 high in the mountains (193, 637), and on the summit of San Pedro 

 Martin Island (417). — C. esculentus, Linn. At Guaymas. (203.) 

 — C. ARTiCDLATUS, Linn. High in the mountains above Guaymas. 

 (636.) — C. FERAX, Rich. At the same locality. (639.) 

 Eleocharis capitata, R. Br. Same locality. (635, 635|.) 

 FiMBRiSTYLis LAXA. With pale glumes. Same locality. (638.) 

 SciRPUS Olneyi, Gray. At Muleje. (37.) 



Paspaluji DISTICHU3I, Linn. High in the mountains above 

 Guaymas. (693.) — P. pobiflorum, Ruprecht. At Muleje aud 

 Guaymas. (45, 79.) 



* The following Juncacece and C'/peraccce were determined by Dr. N. L. 

 Britton, and the Graminex by Dr. Gkorge Vaset. 



