COMPOSIT-aC. (COMPOSITE FJLMILY.) 418 



ing into a broad petiole, coarse-dentate or crenate, upper smaller. 

 Scales of inrolucre elliptical, obtuse — Spring — Coast. 



4. £RIO£RON, L. Fleabane. Irigharun. 

 Heads radiate or discoid. Pistillate flowers strap-shaped, in 

 several rows, and variously tinted, or the inner and sometimes all fili- 

 form, truncate, 2-3-toothed. Disk flowers perfect, 5-toothed, Involucre 

 imbricated. Akenes beakless, more or less flattened. Pappus com- 

 posed of one, rarely two rows of scabrous bristles — Herbs, sometimes 

 woody at base, of various habit. 



* Pistillate Jlowers all strap-shaped. Pappus in 1 row. 

 1 E. Canadense, 2 uniflorum. 

 * * Outer pistillate Jlowers strap-shaped, inner Jiliform. Pappus in Irow. 



3 E. alpinum. 



* * * Pistillate Jlowers all Jiliform, in l-corows. Pappus in 2-1 row. 

 t Perennials. 



4 E. Bovei, 5 trilobum. 



1 1 Monocarpic plants. 

 6 E. linifolium, 7 ^gyptiacum, 8 Aucheri, 9 setiferum, 



1. E. Canadense, L. © Horseweed. Butterweed. .5 to 1, 

 sparingly bristly ; stem erect, leafy, ending in a dense panicle. Leaves 

 linear-lanceolate, entire or sparingly dentate. Heads .004 long ; scales 

 of involucre loose, linear-lanceolate, acuminate ; rays pale pink, erect, 

 scarcely longer than involucre — Summer — A common and deleterious 

 weed of the coast, and lower coast ranges. 



2. E. uniflorum, L. % .05 to .1, tufted, hairy; stems 1- rarely 

 2-3-headed. Root-leaves spathulate, obtuse, tapering into a petiole ; 

 stem-leaves lanceolate, acute, Heads .01 to .015 broad ; scales of in- 

 volucre lanceolate, tapering ; rays white or pale pink, once and a half 

 as long as involucre — August and September — Alpine Lebanon, 

 above the "Cedars." 



3. E. alpinum, L. If .1 to .3, many-stemmed, hirsute. Lower 

 leaves oblong-spathulate, tapering into a petiole ; stem-leaves sessile, 

 linear-lanceolate. Heads solitary, or 3-5, .015 to .02 broad ; scales of 

 involucre linear-lanceolate, acuminate ; rays purjDle, rarely white, once 

 and a half as long as involucre — August and September — Alpine 

 Lebanon above the " Cedars." 



4. E. Sovei, D.C. If Ghazdni. Belleihh. .3 to 2, glabrous; 

 stems woody below, erect, leafy, corymbose, few-flowered. Leaves 

 sessile, linear-lanceolate, acute, remotely denticulate or wavy-margined, 

 the upper half-clasping at base. Peduncles rather long, nearly naked ; 

 heads .006 broad ; scales of involucre short, somewhat speading, the 

 rest appressed, linear, acuminate, scarious except the ne^e, about as 

 long as pappus ; pistillate flowers numerous — April to July — 

 Callirrhoe to Ghor-es-Safiyeh, Sinai, and southward, and westward. 



5. E. trilobuoi, Decaisne. Ij! JSfeJleh. Qurad. .2 to .4, setulose- 

 scahrous ; stems woody below, leafy, corymbose above. Leaves small, 

 tapering into a petiole, the lower obovate-spathulate, with 3-5 obtuse 



