438 COMPOSITE, (composite family.) 



obtuse, the rest half-clasping at base, the uppermost linear-lanceolate 



— April to July — Fields ; coast and lower mountains and interior 

 plains. 



* * Akenes hald. 



2. Cli. seg^etum, L, .3 to .6, glabrous, glaucescent ; stem 

 simple or branched. Leaves tapering at base, coarse-toothed or pin- 

 natifid into oblong, dentate lobes, the upper leaves oblong to lanceolate. 

 Akenes of rays broad, somewhat compressed, triquetrous, with broader 

 marginal ribs, those of disk turbinate, equally lO-ribhed — April and 

 May — Fields ; coast, and lower mountains, and interior plains. 



3. Ch. coroiiarium, L. .3 to .8, glabrous ; stem erect, 

 branching, leafy. Lower leaves tapering at base, upper half-clasping, 

 all Mpinnatisect into acutely toothed^ lanceolate lohes, raehis dentate-lohed. 

 Rays obovate-oblong ; akenes grooved, tubercled, those of disk com- 

 pressed-4-angled, with a narrow wing at inner side — April to June — 

 Fields ; coast and 

 Rephidim (Sinai). 



4. CIi. viscoswm, Desf. .5 to .6, mscid-puberulent ; stem" 

 corymbose, rarely simple. Lower leaves tapering at base, oblong, pin- 

 natifid into short, obtuse, denticulate lobes ; upper leaves half-clasping, 

 oblong-lanceolate, dentate. Akenes obsoletely grooved, wrings of the 

 outer terminating at tip in a triangular^ oblique tootli, those of disk 

 much flattened^ dilated at inner side into a prichly -tipped icing — Spring 



— Coast near Jaffa. 



37. PYRETHRUM, Grertn. Pyrethrum. QaHndesL 



Heads many-flowered, rayed or discoid, sometimes with marginal 

 flowerets in 1 row, strap-shaped, sometimes with flowerets all perfect, 

 3-4-toothed. Scales of involucre imbricated, herbaceous, more or less 

 scarious at margin. Receptacle naked, punctate, slightly convex or 

 hemispherical. Branches of style short, truncate, brush-like at tip. 

 Akenes uniform, prismatic or turbinate, equally ribbed and grooved, 

 all crowned ; crown dentate, sometimes half as long as akene, some 

 times very short — Perennial herbs, sometimes woody at base. - 



* Heads .03 hroad., radiate. Rays tcltite, longer tJian dish. 



1. P. Ca§§iu]ii, Boiss. If 1 or more ; stem loosely corymbose. 

 Leaves oblong in outline, bipinnatisect into oblong-lanceolate, entire 

 or dentate lobes : the lower leaves petioled, the upper sessile, small. 

 Peduncles .1 to .2 long ; crown as long as akene — June — Woods at 

 base of Cassius. 



* * Heads . 005 broad, radiate. Hays white, shorter than dish. 



2. P. Cilicicum, Boiss. 2f 1 or more ; stem leafy, densely 

 corymbose. Leaves 1-2-pinnatisect into oblong, entire or dentate lobes. 

 Cory -inbz many -flowered ; crown short, ragged — June — Woods; sub- 

 alpine Lebanon, and lower and middle regions of Cassius, Amanus, and 

 northward. 



* * * Heads .008 broad, radiate. Rays yellow, shorter than dish. 



3. P. clensiim, Labill. 5 .2 to .4, velvety-canescent ; stems 

 simple, erect, rigid. Leaves .03 to .03 long, elliptical in outline, pin- 



