GRASS FAMILY 125 



America to northern U. S. The California specimens correspond best to var. 

 stenodes Kearn. 



Locs. Susanville, Jones; Lyell Fork, Hitchcock 3291; Kaweah Meadows, Purpus 5128. 



Befs. CALAMAGROSTIS HTPEBBOREA Lange, Fl. Dan. 50: pi. 3. 1880. Var. stenodes Kearn. 

 U. S. Dept. Agr. Div. Agrost. Bull. 11: 39. 1898. C. stricta [Trin. misappled by] Thurb. in 

 Wats. Bot. Cal. 2: 281. 1880. 



11. C. densa Vasey. Culms l 1 /^ to 2% feet high, with creeping. rhizomes; 

 sheaths smooth or scabrous, no pubescence at collar or throat; blades flat or 

 becoming somewhat involute, firm, scabrous, 1 to 2 lines wide ; panicle narrow, 

 dense, spike-like, more or less interrupted at base, 2 to 4 inches long, pale or 

 purple; glumes about 2 l / 2 lines long, acuminate; lemma iy 2 to 2 lines long, 

 scaberulous; awn attached near base, geniculate. shorter than the glumes, 

 the upper portion 1 line long, exserted at side of glumes ; callus hairs 1 line 

 long; rudiment about % line long, the pilose hairs reaching to 1 or l*/2 lines. 



Prairies and banks, Oregon to California. 



Locs. Siskiyou Co., Butler 1746; headwaters of Sacramento, Pringle in 1881; Mendocino, 

 Congdon in 1904 ; Mt. Tamalpais, BlankinsMp 28 ; Congress Springs, Hitchcock 2666 ; Julian, 

 San Diego Co., Orcutt in 1889. 



Befs. CALAMAGROSTIS DENSA Vasey, Bot. Gaz. 16: 147. 1891, type from Julian, Orcutt. 

 C. rilfaeformis Kearn. U. S. Dept. Agr. Div. Agrost. Bull. 11 : 20. 1898, based on the pre- 

 ceding, the name changed because of Deyeuxia densa Benth. C. Tcoelerioides Vasey, Bot. Gaz. 

 16: 147. 1891, type from Julian, Orcutt. C. Jcoelerioides Vasey var. densa Beal, Grasses N. 

 Am. 2: 345. 1896. Of C. densa, there is only the type collection, which is immature. It 

 differs from C. Tcoelerioides in being more robust (about 4 feet high) and in having a longer 

 panicle. So far as can be determined from the immature specimen the spikelet characters 

 are the same as those of C. Jcoelerioides. The two forms are therefore provisionally united 

 under the name C. densa which holds priority of position. 



27. AMMOPHILA Host, 



Spikelets 1-flowered in spike-like panicles. Glumes 2, firm, subequal, com- 

 pressed-keeled, acute. Rachilla prolonged behind the palea as a hairy bristle. 

 Lemma firm, about as long as glumes, surrounded at base with short hairs, 

 2-toothed at apex and mucronate between the teeth. Palea about as long as 

 lemma, rather firm, the 2 nerves close together. A coarse perennial with creep- 

 ing rhizomes, rigid culms and involute blades. Species 1, on the sandy sea- 

 coast of Europe, the Atlantic Coast of North America, and the shores of the 

 Great Lakes. (Greek ammos. sand, and philein, to love.) 



1. A. arenaria Link. BEACH-GRASS. Culms stout. 2 to 3 feet high ; blades 

 elongated, gradually narrowed into an involute point; panicle 4 to 12 inches 

 long, dense ; glumes as much as 5 lines long, scabrous. 



Sands of the seacoast ; introduced on the Pacific Coast where it has been used 

 as a sandbinder. Pt. Arena. Davy 6046 ; Pt. Reyes, Elmer 5064; San Francisco, 

 Heller 5670. 



Befs. AMMOPHILA ARENARIA Link, Hort. Berol. 1: 105. 1827; Davy in Jepson, Fl. W. Mid. 

 Cal. 47. 1901. Arundo arenaria L. Sp. PI. 82. 1753. 



28. LAGURUS L. 



Spikelets 1-flowered, in dense capitate panicles. Glumes linear, long plu- 

 mose-ciliate. Lemma narrow, smooth, 2-cleft, the divisions aristate, a dorsal 

 awn arising from above the middle. Palea hyaline, 2-keeled. A low annual 

 with flat blades and long-exserted, woolly panicles. Species 1, southern 

 Europe, sparingly introduced in California, (Greek lagos, hare, and oura, tail.) 



1. L. ovatus L. Culms 4 to 12 inches high, slender, pubescent ; leaves pubes- 



