GRAMINE^. (grass FAMILY.) 801 



to .0015 broad; glumes lanceolate, keeled, more or less unequal; lower 

 pales appressed, lanceolate, acute or acuminate, mucronate or aristulate, 

 keeled, 3-nerved — Spring — Sands; coast to middle mountain zone; 

 Sinai to Deserts about Dead Sea, Palmyra, and north-eastward. Varies 

 by insensible gradations into S. dicliotoma, Forsk. 



80. BROMUS, L. Brome Grass. 



Spikelets pedicelled, more or less laterally compressed, many- 

 ilowered, the upper flowerets often tabescent, the axis brittle. Glumes 

 usually unequal, shorter than the adjacent floweret, usually keeled. 

 Lower pale herbaceous, concave or keeled, usually bidentate or bifid at 

 tip, aristate at or below tip, rarely muticous; upper pale membranous, 

 3-keeled, entire or retuse, pectinate at keels with stiff hairs — Annuals 

 or perennials, panicles more or less open. 



* Glumes unequal, the lower 1-nerved, the upper o-nerved. 



t Perennials. Spiheletsafter flowering scarcely hroader at tiiJ. Root fibrous. 



X Sheaths of marcescent root-leaves^ entire or split into parallel fibres. 



1 B. erectus. 



\ X Sheaths of marcescent root-leaves split into reticulated fibres . 



2 B. tomentellus. 



1 1 Annuals. Sptilcelets after flowering broader at tip. 



8 B. tectorum, 4 sterilis, 5 flabellatus, 6 Haussknechtii, 7 Matri- 

 tensis, 8 rigidus, 9 rubens, 10 fasciculatus. 



* * Glumes nearly equal or unequal. Sqnhelets eveii after flowering nar- 

 rower toward tip. 



t Floicerets, even in fruit, imbricated. 

 X Margin of lower p)ale more or less convex not angled. 

 11 B. scoparius, 12 alopecujus. 

 X X Margin of lower pale forming an obtuse angle at or above middle. 

 13 B. squarrosus, 14 macrostachys, 15 intermedins, 16 mollis, 17 

 brachystachys. 



t t Flowerets in fruit not imbricated. Margin of lower pale obtuse-angled. 



18 B. patulus. 



* * * Species not sufficiently Tcnown. 



19 B. pulchellus. 



1. B. erect ii§5 Huds. 2]! .G to 1.5, erect, rigid. Lower leaves 

 linear, narrow, sparingly liairy, plicate; culm-leaves broader, flat. 

 Panicle erect-lanceolate, .15 to .2 long, branches slender, scabrous, the 

 lower 3-6 in a half- whorl; spikelets 3-8-flowered, linear-lanceolate, .02 

 to .025 long, .005 to .006 broad when open, glumes linear-lanceolate, 

 acute; lower pale glabrous, linear-lanceolate, 5-7-nerved, 2-toothed at 

 tip, with a straight awn half to three-fourth its length — April to June — 



Var. Syriacus, Boiss. Leaves less unequal, the lowest long, flac- 

 cid. Panicle looser, the lower branches spreading — Fields and rocky 

 places ; coast to middle zone of mountains. 



2. B. tomcntelIu§, Boiss. 2^! .5 to .6, erect, rigid. Lower 



