A wa20ccidentalis (Nut‘é,) T. & G open erect glabrous perennial herb with 
elongated rootstocks, the stems 80-150 cm. tally .very leafy, the leaves linear, 
entire, d-veined, 5-10 cm. long, 2.5-8 mm. wide, sessile, narrowed at both ends, 
acute; "inflorescence &@ loose panicle 30-60 cm, long, composed of several Corymbs 
at the tips of its slender ascending branches; heads numerous, their involucral 
bracts 2-4 mm. lon: -, lanceolate or oblong-lanceolate, acute, l-veined the mar- 
gins scarious; ray-f lowers 16-20, their corollas oe ° long, achenes hispid 
with rigid hairs. 
Frequent in moist round alone banks of slower Streams at low @levations. 
se elongata Nutt. “trom horinp nacelle yor'os With virgate stems 
60-80 cm. tall or more from hor 
ce 
, Small curving hairs, es pecially above; leaves numero 
1zOntal rootstoc ‘Sp Sparingly pubescent with 
us, ascending, the lower- 
5- 15 Cm. long, the upper 
sessile, all Sharply 
rough-hairy on the edses 
most oblanceolate, narrowed to indistinct petioles, 
oblanceolate, narrov Vly ellirntical hie gher on the stem, 
but remotely toothed or entire, gute at both ends , 
and midvein beneath, otherwise | Slabrous; heads very qunerous usually in a 
narrow rhomboidal or elliptical panicle 10-30 cm. long, this frequently pyramidal 
or even corymbose ,the branches always ascendant or nearly erect, their involucral 
bracts 1.5-3.5 mm. long, narrowly lanceolate, vishal: 
flowers 12-18, their corollas Je5—-4.5 mm. long 
hirtellous. 
achenes scarcely 2 m. long, 
Frequent in dry burns and in dry soil throughout our region. 
A woe Serotina Ait. var. salebrosa Piper. PRAMS Eek atari herbs with 
elongate rootstocks, oe Stems erect, 60-120 cm tall, virgate, puberulent 
With minute curved hair especially in the tices parts, or minutely glandular , 
more or less glaucous; Gace leaves oblanceolate, soon Withering, the stem 
leaves ascending 6-12 cm. lons, narrowly elliptical or oblanceolate , sessile, 
acute at both ends, sharply toothed , tae teeth salient, rou: sh-hairy on the 
marsins and veins beneath, otherwise | 2labrous; heads very numerous and 
crowded in showy pyranidal Or ovoid vanicles £0-40 cme lone, the branches of 
which recurve and droop, their involucral bracts narrowly lanceolate, acute, 
&-4.5 mme lon: » Sparing gly and minutely hirtellous; ray-Llowers 7-14, their 
corollas 3.5-4 mme lon:; achenes 1.5 m. long, narrowed Slightly at both ends, 
S-ribbed, Sparingly hirtellous. 
Common in burns and meadows and along streams. 
the midveins prominent; ray =/ 
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