SUNFLOWER FAMILY 335 
leaves smaller, oblanceolate # hagas i ed eal sessile, vontend or entire, those of the benches 
reduced to often n ninute bra Paar ly periig cym sely, paniculately or sometim 
ong duate, 6-10 ain. 
nce- ‘lin nied or linear bith: etite to acuminate, with indurate base 
sad always squarrose), cuspidate, cinereous- 
s 11-25, rarely wanting, violet, 4-1 
long; achenes somewhat compressed, obscurely striate, 2-4-nerved, finely pilose; pappus rather 
soft, isp an graduate 
ually in ah sisead’ Upper Sonoran and Transition Zones; southern British Columbia southward 
f n one nd npertcepes ia to rae, gerry of southern ory ad eastward to Saskatchewan and 
Colorado; prone! a occurring as a w e locality: ‘‘on the banks of the Missouri.” July—Oct. 
variable species as to tagatoeral Pt nbn. and ‘growth habit. Certain segregates seem to be locally dis- 
tinguishable but confusing intergrades are Capoy in the same region. It is therefore here considered to be a 
species complex until intensive work is done on the group to ¢ arity the Peto il he eee comet Machacranthera 
pinosa (a probable synonym of Diplopappu 3 pon norh. Lindl. per orymbose 
of few — M. aie ae has a —- root from whieh “tise eave a Seat, et stems and an inflores- 
cence of m ra a all Mf, ag uata is a ons plant with gt heads ae appears to be close to true 
canescen yee : dekned b y A. fam site n the $ soptionl pore : 206); M. rnatus is a tall rayless form virgately 
branched, from the plains east of A eatne Shasta, Californ 
5568. Machaeranthera caer 5570. Machaeranthera shastensis 
5569. Machaeranthera lagun: 5571. Machaeranthera canescens 
