146 BOTANY. 
pubescence; stems many, branching, 3-6' long; leaves linear-spatulate, 9-15" 
long; heads showy, very many, sometimes leafy-bracted, but mostly on 
naked peduncles 1' long ; involucre hemispherical, 5-6" wide, the scales in 
about 3 series, the broad white scarious margins deeply fringed ; rays pink ; 
pappus of the ray composed of minute lacerate scales long, that of the 
disk of stout bristles li" long, with a few shorter ones intermixed; achenia 
minutely pubescent. — Wyoming to xirizona and New Mexico, Shore of 
Stansbury Island, Great Salt Lake, 4,250 feet elevation ; June. (520.) 
MACHiERANTHEEA^ CANESCENS, Gray. PL Wright., 1. 89. Commonly 
canescent with a minute soft pubescence ; stems several from a usually 
biennial root, 6-18' high, much branched; leaves spatulate or somewhat 
lanceolate, all but the lowest sessile, usually pinnately dentate with sharp 
recurved teeth, vai-ying to entire, obtuse or acute, often mucronulate ; heads 
many, panicled or somewhat corymbose ; involucres 4-5" wide, the scales 
ovate, oblong or even hnear, with rather acute, herbaceous, puberulent or 
viscidly glandular tips, the outer ones shorter and squarrose or recurved ; 
achenia pubescent. — Oregon to Arizona and Texas, Wyoming and Colorado. 
A most variable plant, several forms occurring in this collection. 
1. Glabrous, much branched; leaves spatulate, more or less toothed; 
involucral scales lanceolate, minutely resinous, the tips green, squarrose. — 
Valleys of Central Nevada; 6,000 feet elevation; July, August. (521.) 
2. Minutely pubescent, many stemmed ; leaves spatulate, entire or few- 
toothed at the apex ; scales ovate-oblong, the tips green, squarrose. — Bear 
River Canon, Uintas ; 8,000 feet elevation ; August. (522.) 
3. Minutely canescent, mostly branched ; leaves oblanceolate or spatulate, 
often broadly so, more or less spinulose-toothed ; involucre of lanceolate 
appressed scales, the tips shghtly spreading.— The commonest form and near 
to var. latifhlia, but the involucral scales are not subulate. Mountains and 
foot-hills, from Western Nevada to the Wahsatch ; June-September. (523.) 
» MACH.ERANTHER A, Nkks. Heads many-flowered ; the rays conspicuous, pistillate, fertile, in 
one species nentral ; disk-,!,,. . . s perfect, the corolla tubular, 5-toothed. Involucre OToid-hemispherical, 
the scales imbnoatod ,n s.v. ra I series, oblong or linear, Avith spreading or recurved herbaceous points. 
Receptacle flat honeycombed, the cells ^ith toothed edges. Appendages of the style narrowly lanceo- 
late, nnnutoly hus„r<.. A-uhers .ai<l to have " cultriform appendages." Pappus of numerous very 
unequal s<.abn.ns au<l rathe. r,gid bristles, that of the ray-flowers somewhat shorter. Achenia obovate- 
fnsUorrn sbgiuly eon.pres,se<I, i.ulistinorly striate, pubescent or silky.-Herbs, annual, biennial or peren- 
mal, w.th braneh.ng st..nKs and pin.atitid, toothed or even entire leaves. Genus very near to Aster, but 
^nlJ^in '''' ""^^1"'-^^ l^'-^PP"^ «^ ^i^J^ -^y- Consists of four species, 
lound in the region extending from Oregon to Colorado and southward to Mexico. 
