306 CJKAMJiNi'J.K. DLstithlis. 



crowded slieatlis ; leaves rigid, mostly invdliite. Pistillate spikelets much more rigid 

 than the staminate. — Demazeria, iJiimort. Brizopyrum, Link. 



A snmll genus separated I'loiu I'oa on account of its many nerved coriaceous palets. 



1. D. mai'itima, IJaf. Cidms G to 18 inches high, sometimes branched below : 

 leaves about i inches long, usually distichously spreailing, long-acuminate : spike 

 oblong, 1 to 3 inches long; spikelets 4 to G lines long, 5 - 12-llowertd : ilorcts 

 smooth, excepting the minutely ciliato keels of the upper palet. — Journ. I'hys. 

 Ixxxix. 104 ; Benth. Fl. Austral, vii. 037. Uvinla sjjicata, Linn. Festuca dis- 

 tichophylla, ^lichx. Brlzopi/ram Amerlcanuvi, Link, llort. T>erol. i. IGO. Brizo- 

 pyrum borealc, Presl, Kel. Ha'uk. i. 280. rua Michauxii, Kunth, Enum. i. 325. 

 Brhopi/nan s/>ica(am, Hook. & Arm liot. Beechey, 403 ; Gray, Manual, G28. 



Var. striata. Leaves setaceously convt)lute : panicle loose; spikelets lew, erect, 

 often an inch long, 10- 20-llowered. — Uniola strida, Torr. in Ann. Lye. N. York, 

 i. 155, and Marcy's liep. 301, t. 20. Uuiula multijloya, Nutt. Fl. Ark. 148. Bri- 

 zopyrum spicatum, var. stridum, C!ray. 



The typical form at San Francisco {Bui under), San buis Oliispo {llrnccr), and common on the 

 Atlantic coast, usually near salt water. The variety at the sink of the Mohave (Coujier), in Puerto 

 Canon (Brewer), and the prevalent grass in alkaline localities through the interior to the Rocky 

 Mountains and southward into Mexico. Exceedingly variahle ; specimens from the coast are yel- 

 lowish throughout with short sjnkelets, while iidiUKl localities furnish forms with very long erect 

 sjiikelets and the jilaiit usually greiii. Toiiey's (7. strictd was founded on an extrenu; foiui 

 with very long erect sjiikelets. Sometimes the culms hear clusters of arrested hardened sheaths, 

 iipliearing like oue-sidi'd cones, ]m)lialily tlue to the wotuid of .some insect. JlrizDjn/nun JJuikj- 

 lasii, Hook, k Arn., which resemhles this in little .save in being dicccious, is referred to J'oa. 



47. LOPHOCHLJENA, Necs. 



Panicle a simple elongated virgate secund raceme. Spikelets long, narrow, many- 

 flowered, compressed. lihachis breaking up at maturity, undulate, smooth, its joints 

 less than half the length of the llorets. Glumes shorter than the lowest florets, 

 membranous, the lower 1-nerved, the upper and larger 3-nerved. Lower i)alet her- 

 baceous, becoming chartaceo-coriaceous, narrowed below to a rounded smooth callu.s, 

 scarious and 2-lobed or truncate at apex, prominently 7-nerved, the midnerve pro- 

 duced as a straight rigid awn. Upper palet nearly equal, the central portion similar 

 in texture to the lower, the margin and apex scarious, strongly 2-nerved and 2-keeled, 

 folded between the nerves, and the margins strongly infolded, the nerves with a 

 simply or lacerately toothed wing-like appendage. Stamens 3, violaceous (at least 

 in the first species). Scales short, fleshy, connate. Ovary smooth, ovoid, stii)itate : 

 styles very long, divergent, plumose near the apex, (irain somewhat triangularly 

 compressed, strongly furrowed : pericarp loose, 2-horneil with tlie bases of the stig- 

 mas.— Tayh Ann. Nat. Hist. i. 283. 



Soft and smooth annuals, of which two species are known, with somewhat the appearance of 

 a Bromus. Tin; consiiicuously toothed marginal wings \ipon the ui)per palet distinguish this 

 from all our other gcneia. 



1. L. Californica, Xees, 1. c. Culms tufted, about 2 feet high, constricted and 

 dark colored at the nodes, clothed below by the overlapping siieaths : lower leaves 

 4 to G, the upper 1 or 2 inches long, obtuse, about 2 lines wide, barely roughish ; 

 ligule 3 lines long, very thin, a(;ule : panicle G to 9 inches long, of G to 12 sul)erect 

 or spreading .spikelets about an inch long, on stout llatteiied pedicels a third as long : 

 glumes colorless and shining except the nerves, the ui)per irregularly notched at 

 apex : lower i)alet 3 lines long, the rough awn as long, very scabrous on and between 

 the nerves; the three central nerves uniting above, the others evanescent; upper 



