GRASS FAMILY ^"^1 



A native of Europe, ecmimonly cultivated in the ctWKr, regions of tM'T*[. S. as 

 a meadow grass. Escaped from cultivation aloi'i'i;' roaifsiiVes and in wasre places. 

 Yreka, Butler 835; Scotia, Davy cO Blasdale r)<).;i/;;,J^,i,'iL^y}it^y<j,UKy,:,//<,/((,y.->.^G57 ; 

 Lake Tahoe, McGregor 199 ; San Bernardino, Fwi^Hi-A ^i:tK,ua\qziioa min;) 



Refs.— Dactylis glomerata L. Sp. PI. 71. 1753; Thurb. in 'WaitSilBoto aaLaaaiSffiluaSSO ; Davy 

 in Jepson, Fl. W. Mid. Cal. 65. 1901; Abrams, Fl. Los A<Bgj..48,ul9e4liq Jon aiimiiio,! 



57. LAMARCKIA ^ftitji^^hl^^'';'^^;-;^!' J;°2 



Spikelets of 2 forms, in fascicles, the tcrniinii'rog,^^qj^'|||3|]^''|^§^^ fertile, 

 the others sterile. Fertile spikelet single, wi-^b„i|[3pg5£est„ilp?ei<„^lie raehilla 

 produced beyond the floret into a slender stipe^ .bearitiga small' aWbed empty 

 lemma, or reduced wholly to an awn. Glumes' liarroWr acumiftate, or short- 

 awned, 1-nerved. Lemma broader, 1-nerved, bfe&tiiy§''belmf;th6'!kpex. a slen- 

 der straight awn. Stamens 3. Sterile spikelets .lin^ar^J'T'jt^^Sjj^j'i^^a^';^,''^^^ 

 consisting of 2 glumes similar to those of the'|^,^i^g|^pikf!,l^^, ,acncl,iBtij?nierous, 

 distichou.sly imbricated, obtuse awnless empty lemiuias.i.iiiAi lownantiiuftl grass 

 with elegant 1-sided narrow panicles of crowded fas<^ieHlate"8pi'k<elet'S;"fh'^ fer- 

 tile spikelets being hidden, except the awns, by W6''ritlirter6tiyi^'fef'6Wffe'^'i)nes. — 

 Species 1, southern Europe, introduced in California. (Jean B^pfi.s^e Antoine 

 Pierre Jlonnet, Chevalier de La ]\Iarck, the eminent,JIfrle;^lcl^ n^ti^ral^i^t.) 



1. L. aurea ]\Ioench. Golden-top. Culms ei'ecit, loir decujiiibjeiut ^atibase, 4 to 

 15 inches high; leaves smooth; ligule promineiit, decurrent as 'a'' Ijij^oad, seari- 

 ous margin; panicle dense, 1 to 3 inches long, %^'lft!>"I1liHt^h'Wfd^i'|i^feing, gold- 

 en-yellow or purplish, the branches close, short, erect ;' 'peclicels fascicled, 

 somewhat clavate, pubescent, spreading at right angles, the fascicles with a 

 tuft of long whitish hairs at the base; fertile spikelet about 1 line long, the 

 sterile 3 to 4 lines long; glumes narrow, hyaline, 1 line long; lemmas awned 

 from lielow the apex. 



A native of the ]\Iediterranean region, abundantly naturalized in southern 

 California, rarer northward to Santa Clara Co. ; also in northern Mexico. 



Eefs. — LAMARCKIA AUKEA Moench, Meth. PI. 201. 1794; Thurb. in Wats. Bot. Cal. 2: 299. 

 1880; Davy in Jepson, Fl. W. Mid. Cal. 65. 1901; Abrams, Fl. Los Ang. 49. 1904. Cynosurus 

 aureus L. Sp. PI. 72. 1753. Achyrodes aureum Kuntze, Rev. Gen. PI. 2: 75S. 1891. 



58. POA L. 



Spikelets 2 to several-flowered, the uppermost floret rudimentary, in open or 

 narrow panicles. Glumes keeled, 1 to 3-neryed. Lemmas herbaceous or mem- 

 branaceous, mostly scarious-tipped, acute or obtuse, keeled, awnless, 5-nerved, 

 the intermediate nerves sometimes obscure, keel and marginal nerves sometimes 

 villous, the floret sometimes with cobwebby hairs at base. Annuals or peren- 

 nials with blades ending in a navicular point. — Species niinierous, over 100, in 

 the temperate and cool regions of l>()th hemispheres. (Greek poa, grass or 

 fodder.) 

 Plants annua!. 



Lenunas villous on nerves below. 



Panicle pyramidal, open ; sheaths smooth 1. P. annua. 



Panicle narrow, contracted; sheaths scabrous 2. P. bigelovii. 



Lemmas not villous on keel and nerves. 



Sheaths rough; lemmas pubescent on back 3. P. howcUii 



Sheaths smooth ; lemmas smooth or nearly so 4. P. holanderi. 



Plants perennial. 



Creeping rhizomes present. 

 Lemmas not webbed at base. 



Glumes 4 lines long; spikelets about Vi inch long 5. P. macrantha. 



