74 TRIANDRIA. DTGYNIA. 



The g-cnus nartyU^, as it now stands in Persoon, ap- 

 pears to exist chitHy in tb.e milder reg-ions of Africa, the 

 Cape of Good Hope, and Barbuiy; tliere are also 2 or 3 

 species in India. Tliese species appear, however, to pos- 

 sess little or no affinity w.th the D. glomerata of Europe. 



104. KOELERIA. Persoon, 



Calix irregnlai'iy 2 or 3 ilowcred, 2-vaIvc(l, 

 valves cf)ni}Mt\sse(l-carinate. Corolla aciimiiiate- 

 oblong, 2 valved, shortly avvned, longer tlian 

 the calix, flumes neivose. (Spike coiiiposcd of 

 conipi ( sscd s]>ikeU'ts, otten pubevsceiu and sub- 

 sessile.) 



Fk)\vers in a simple lobed spike, almost as in PhJe- 

 urn; spikelets crested; culix 2 or more flowered, resem- 

 bling- BiictifUs glomerata, to which some of llic species of 

 this preniisare neaih' allied. 



Specifs 1. K.cristata. 2-*Ju'tida. Spike elong-ated, lob- 

 ed; lobts crowded, appressed, approximate; splkeleis ob- 

 loiig"-ovate, smootli and awnle-s, lower 2-flovvered, up- 

 per 3, both with an additional setaceous rudiment; pedi- 

 cells very short, and with tlie leaf and sheath somewhat 

 pubescent; stipule liairy 



Obs O? Culm about a span, smooth, and striate; leaf 

 very short, sheath long, sp ke a!)OUt 2 incites; spikelets, 

 greenish, sc riose, shinini:,, conipre-^-sed; calix unequal, ca- 

 rinate, acute; lurg-er valve linear-oblong-, smooth, (through 

 a lens) cilate on the keel; coiolJa smiilar to the caJix, in- 

 ner vahe included in the outtr. 



On h^ plains of the .V?issouri, v. v. Very nearly allied 

 to the Mra cnstata of Smith, and in the structure of its 

 flowers to the Ductylit glomerata! 



This genus, now coiitaiting 8 species, indigenous to 

 Europe, lo North America and Buibary, thott.^h perfectly 

 natural, is not at present sufficiently defined, except by 

 habit; at the same time it ought never to have been con- 

 founded with PoQi With Mra, or Jivena. 



105. AVENA. L. (Oat-grass.) 



Calix 2-valved, 2, 3, or niany-flowerod. Cn- 

 ro//a, exteiiisr valve lanceolate, somewhat te- 

 r. te, furnished with a dorsal awn. Awn g^rni- 

 culate, and contorted. ** Seed ior the most part 



