"■"^ COMPOSTT.E. (COMPOSITE FAMILY.) 1 f»r5 



» « Scales of the pappus about 10, linear-lanceolate, and with a distinct nb: 

 leaves all alternate and entire. 



2. B. nudicaulis, Gray. Cmereous-puberulcut and glabrate, upper part 

 of the scapiforiu steiu and involucre niiiiutoly glamluhir, a sj)an or two high: 

 leaves nearli/ all radical, oval or spatulate-cjhlong, tajjoring into a Klenth-r i)eti- 

 ole: heads solitary or few and somewhat cur\nihosely paniculate, ncarli/ J Jmh 

 high: involucre of about 10 oblong bracts: rays 6 to 9, oblong: pappus full </ 

 half the length of the cuneate-liuear sparselg hairg akene ; the thin margins of 

 tlie palei\3 of the pappus erose. — Proc. Am. Acad. xix. 21. Wind Kiver 

 Mountains, X, AV. Wyoming, Farrg. 



3. B. oblongifolia, Gray. Smaller: stems sparselg leafg almost to tli9 

 3-cephalous naked mjlorescence : leares narrowig oblong: head onlg 4 lines high, 

 narrow ; paleae of the pappus firmer, smoother, and with entire edges, little 

 shorter than the glabrate akene — Loc cit. On the Sau Juan and Rio Colorado, 

 S. E. Utah or adjacent Colorado. 



* * * Leaves once or twice palmatelg or pedatelg divided : akenes mostlg hirsute 



along the slender attenuate base. 



•t- Leaves mainlg opposite : rays none ? pappus oj broad and verg obtuse scales. 



4. B. Neo-Mexieana, Gray. A span or more high, minutely puberu- 

 lent : leaves 3 to 7-parted into narrow linear divisions ; uppermost little shorter 

 than the slender peduncles: involucre of about 10 sparingly pubescent spatu- 

 late bracts : disk-corollas small, with glandular tube, almost equalled by the 

 obovate scales of the pappus, which are much thickened at and near the base. 

 — Proc. Am. Acad. xix. 27. New ^Mexico and S. Colorado. 



•»- •♦- Leaves mainlg alternate: rags 16 to 20, obovate-oblong .. gellow: pappus 



none. 



5. B. chrysanthemoides, Gray. Taller and stouter, 1 to 4 feet liigh, 

 puberuleut or below glabrous, above with the flowering brandies and sjiort 

 peduncles glandular-pubescent and viscid: leaves 1 to 3-ternateh divided or 

 parted ; the lobes from oblong and obtuse to nearly linear : heads 5 or 6 lines 

 high and broad: bracts of the involucre 16 to 20, crowded, from oblong-lan- 

 ceolate to obovate-oblong, most of them conspicuously acuminate. — Proc. 

 Am Acad. xix. 28. Villanova chrgsanthemoides, Gray. Along mountain- 

 water-courses, Colorado to S. Arizona. 



51. HYMENOPAPPUS, L'Her. 



Mostly floccose-tomentose and with sulcate-angled erect stems, alternate 

 mostly 1 to 2-piunatifid or parted leaves, and cymoso or solitary pedunculate 

 heads of white or yellow flowers 



» Flowers white ; the tube long and slender and stamens much exserted : pappun 

 of verg small scales forming a crown, or obsolete • akenes puberuleut : involucre 

 of parfh/ vhite-petaloid liracts. 



1. H. COrymboSUS, Torr. & Gray. Slender and glaluato, naked above: 

 lower leaves 2-pinnately and the small uj)per ones mostly simjdy parted into 

 narrowly linear acute divisions and lobes : heads 3 or 4 linos high : bracts of 

 the involucre shorter than the flowers, obovate-oblong, the i)etaloid summit 



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