196 COMPOSITE, (composite family.) 



* * * Leaves mostly parted or dissected into narrow linear lobes, crowded on the 



thick comparatively simple caudex and scattered on the short Jioivering stems : 

 heads large: involucre very icoolly : scales oj the yappus attenuate into a subu- 

 late but hardly aimed point. 



5. A. Brandegei, Porter. Leaves glabrate, with 2 or 3 lobes toicard the 

 upper part, or some entire, narrov/ly linear, only 2 or S on the somewhat scapiform 

 pimple flowering stem (a span or more in height) : head therefore conspicuously 

 pedunculate, ^ inch high and wide: involucral bracts lanceolate: rays 12 to 16, 3 or 

 4 lines long. — Gray, Proc. Am. Acad. xiii. 373. A. grandijiora, var. glabrata, 

 Porter, Fl. Colorad. 76. Alpine region of the mountains of S. Colorado. 



6. A. grandifiora, Torr. & Gray. A span or two high, very stout, ^oc- 

 cose-woolly, somewhat glabrate in age : stem simple or branching below, leafy : 

 leaves with petiole scarious-dilated at base, lower ones 2 to 3-ternately or quinately 

 parted, upper with 3 to 5 simple lobes • involucre about an inch broad, very 

 woolly; its bracts linear: rays 30 or more, over ^ inch long. — Alpine regions, 

 from Montana to Colorado. 



§ 2. Involucre double or of two distinct series of cmnaceous or rigid oppressed 

 bracts, the outer connate at base : leafy-stemmed and branching. 



7. A. Richardsonii, Nutt. A span to a foot high, m tufts from a mul- 

 ticipital caudex, puberulent or nearly glabrous, woolly in the axils of radical 

 leaves, polycephalous : upper leaves mostly once and lower twice ternately 

 parted into long and simple filiform-linear lobes, rather rigid : involucre 2 or 

 3 lines high, 6 to 9-angled ; the 6 to 9 bracts of the outer strongly cariuate, 

 united for the lower quarter or third : rays broadly or sometimes uarroAvly 

 cuneate, 2 to 4 lines long — Plains, Saskatchewan and E. Oregon to Utah 

 and New Mexico. 



55. HELENIUM, L. Sneeze-weed. 



HerbS; with alternate simple leaves, commonly resinous-atomiferous and 

 punctate, and with pedunculate heads of yellow flowers 



* Leaves not decurrent, entire: rays long and narrow: bracts of the involucre 



numerous in two series, tardily reflexed in fruit: heads comparatively few and 

 large. 



1. H. Hoopesii, Gray. Slightly tomeutose or pubescent when young, 

 soon glabrate : stem stout, 1 to 3 feet high, leafy, bearing several or sometimes 

 solitary large heads : leaves thickish, oblong-lanceolate, or tlie lower spatulate 

 with long tapering base : rays becoming an inch long, tardily reflexed : disk 

 -^ to f inch high, hemispherical : scales of the pappus ovate-lanceolate, long 

 attenuate-acuminate, a little shorter than the corolla. — Proc. Acad. Philad. 

 1863, 65. Mountains of Montana to Ncav Mexico, Arizona, and California. 



« * Stem v:inged by the decurrent serrate or denticulate leaves : rays cuneate or 

 oblong, soon drooping : involucre small and simple, of linear or subulate bracts, 

 soon reflexed: heads more numerous [corymbose) and smaller. 



2. H. autumnale, L. Nearly glabrous or minutely pubescent: stem 

 very leafy, narrowly winged, 2 to 6 feet high : leaves lanceolate to ovate 

 oblong r heads about | inch in diameter, usually equalled by the rays : pappus 



