COMPOSITE. (COMPOSITK FAMILY.) 191 



* * Lobes of disk-corollas ovate or oblong, decidedli/ shorter than the throat : 

 pappus shorter and coroniforni or obsolete : vcn/ leaf;/ below, sendimj up long 

 and naked j)ed uncles: outer involucre short. 

 3. T. SUbnudum, Gray. Rather stout: leaves thickish and ri •rid, once 

 or twice ternately parted into linear or lanc-eolate lohes : peduncles 4 to 10 

 inches long: liead ^ inch high: rays sometimes none, sometimes ample: pap- 

 pus a minute 4 to .5-toothed naked crown, or ol)soIute. — I'roc. Am. Acad. x. 

 72. Green River, Wyoming, Parnj ; mainly in New Me.xico, X. Arizona, and 

 S. Utah. 



45. MADIA, Molina. Takwekd. 



Glandular and viscid herbs, mostly heavy-scented : with entire or merclv 

 toothed leaves, some or all of them alternate: heads axillary and terminal. 

 Ours belongs to the § Euniadia, in which the rays are few and inconspicuous 

 or none and the pajipus none. 



1. M. glomerata, Hook. A foot or so high, rigid, very leafy, hirsute, 

 glandular only toward the inflorescence: leaves jiarrowly linear: heatis glom- 

 erate- rays 2 to 5 or sometimes none, not suryjassing the about e(|ual 

 number of disk-flowers : akenes narrow, those of the disk 4 to 5-angled , 

 of the ray somewhat curved and 1-nerved on each face. — Mountains of 

 Colorado, to the Saskatchewan, the Sierras of California, Oregon, and 

 Washington. 



46. LAYIA, Hook. & Arn. 



Branches terminated by showy heads of (in ours) white flowers : pappus of 

 10 to 20 stout bristles, which are jdumose below the middle : herbage hispid 

 or hirsute, somewhat viscid, above beset with scattered stipitate blackish 

 glands. 



1. L. glandulosa. Hook. & Arn. A span to a foot or more high, dif- 

 fusely branched: lower leaves lanceolate or linear, laciniatepinnatifiil or 

 incised, upper narrow and entire : rays 8 to 13, large and conspicuous (Itright 

 white or tinged with rose), ^ to f inch long, 3-lobed: villous hairs of the pap- 

 pus bristles copious, the outer straiglit and erect, the inner soon crispo.l and 

 interlaced into a woolly mass. — Barren ground, from New Mexico through 

 S. W. Colorado to Idaho, and westward. 



47. RIDDELLIA, Nutt. 



Low and corymbosely branched woolly herbs : with alternate and spatulatr 

 or linear leaves, the cauline entire: small heads of yellow flowers: l»r:icts 

 of the involucre distinct, but connected by the intricate wool .-^o a-s to .seem 

 connate. 



1. R. tagetina, Nutt. Loosely or somewhat villoscly lan.ife. sometimes 

 glabrate in age, rather widely branched : radical and even lower cauline leaves 

 often laciniate-pinnatifid: heads numerous, mostly cymosely du.-tered and 

 short-peduncied : scales of the pappus oblong lanceolate, entire, usually (tbnise, 

 i or f the length of the disk-corolla. — W. Texas to E. Colorado and Arizona 



