860 GR AMINES. (GRASS FAMILY.) 



exserted; middle bristle of awn .03 to .05 long, one-third naked, the 

 rest feathery, twice to three times as long as lateral bristles — May — 

 Es-Saisaban to Sinai, and Egypt. 



5. A. plumosa, L. % Dherdri. Jebah. Sha'reyeli, Nesi. Mar- 

 gUt. .3 to .5. Sheaths of leaves and internodes tomentellous or woolly; 

 iigiile reduced to a ring of bristles. Panicle .1 to .2 long, .03 to .04 

 b?oad, loose; glumes glabrous, unequal, lanceolate, acuminate, the up- 

 per longer; lower pale one-third as long as glumes; awn naked; middle 

 bristle Toi to .OG long, one-fifth naked, the rest feathery, three to five 

 times as long as lateral bristles — May — Sands ; coast and deserts. 



6. A. bracliypocla, Tausch. If Sefsiif. .2 to .4; culms often 

 tomentellous at intermediate internodes. STieatlis of leaves cjJdbrous ; 

 ligule reduced to a ring of bristles. Panicle narrow, .1 to .15 long, 

 .03 to .03 broad; glumes glabrous, linear-lanceolate, obtuse, the upper, 

 longer ; lower pale hirsute at base, one-fourth as long as glumes, awn 

 naked; middle bristle .03 to .05 long, one-fifth naked, the rest feathery, 

 2 to 4 times as long as lateral bristles — May — Sinai; Callirrhoe (Moab). 

 Too near the last. 



7. A. Forskalilei, Tausch. 2f Shefshuf Sefsuf 'Ain SilL 

 Dhereri. .3 to .4. Sheaths of leaves glabrous; ligule reduced to a ring 

 of hairs. Panicle linear, .1 to .15 long, .02 broad; glumes linear-lan- 

 ceolate, acuminate, the lower glabrous, the upper longer, sometimes 

 somewhat ciliate ; lower pale silky, one-fourth as long as glumes, awn 

 included, naked; all the dristles of awn more or less feathery, or one or 

 loth of the lateral naked, the lateral two-thirds to three-fourths as long as 

 the intermediate— -S-piing to Autumn — Sandy places; Callirrhoe and 

 southward; BeirCit. 



8. A. liirtigluina. Steud. 21 .2 to .4. Sheaths of leaves bearded 

 ia place of ligule. Panicle open, .15 to .2 long, .04 broad; glumes 

 hirtellous, lanceolate, obtuse, the upper longer ; lower pale with a plu- 

 mose base, 2^tt2^illose-muricate, as well as its stalk-liJce ap2:)endage ; awn 

 naked or hairy below the knee ; the lateral bristles naked, one-fourth to 

 one-third as long as the feathery middle one which is .06 to .07 long 

 — Spring — Sinai. 



t t Awn divided near hase into unequal bristles, the middle .013 to .015 

 Img, feathery except at lase and tip, the lateral naked, half as long. 



9. A. acutiflora, Trin. et Rupr. If .3 to .45. Sheaths of leaves 

 short-ciliate at mouth. Panicle elongated, contracted; glumes lanceo- 

 late, tapering-acuminate, the upper somewhat longer, ^-denticulate at 

 tip ; floweret short, staTk-like appendage to lower jjale long, appressed- 

 sericeous, ciliate at tip; the undivided part of awn .003 long, naked, 

 not geniculate ; middle bristle .013 to .015 long, naked below, feathery at 

 middle, naked toward tip, the lateral bristles setaceous, naked, half as 

 long — Spring — Arabia Petraea. 



25, STIPA, L. FeAther-Grass. 



Spikelets 1 -flowered, laterally compressed, the perfect floweret 

 stipitate. Glumes membranous, lanceolate, subulate-acuminate, longer 

 than flowerets. Pales coriaceous, at length indurated, the lower con- 

 volute, enclosing the upper, with a callous spur at base, and jointed at 

 tip to a twisted, geniculate, usually very long, single awn. Stamens 

 3, rarely fewer, anthers usually bearded at tip. Styles 2-3, short, stig. 



