152 
BOTAJ^Y. 
1-nerved, entire ; peduncles short ; involucre nearly glabrous, half as long as 
the matured disk-flowers ; the scales in 2-3 series, unequal ; rays in 1 series, 
elongated, apparently purple ; achenia sparingly pubescent ; pappus double, 
the outer of short bristles." — Heads when expanded about 9" broad. Cali- 
fornia, (240 Bridges ;) Yosemite Valley, (Brewer.) A dwarfed and irregu- 
larly branched form was collected near Carson City by Dr. Anderson. Star 
Peak; 10,000 feet elevation ; September. (545.) 
Eeigeron ochroleucum, Nutt. Pubescent with appressed hairs ; stems 
several or many, assurgent, spreading from the top of a perennial fusiform 
simple caudex ; radical leaves many, narrowly linear or filiform, 2-3' long, 
i-1" wide, 1-nerved, narrowed into a petiole ; cauHne ones smaller, sessile ; 
heads terminal, sohtary, or 3-5 on a stem, about 8'' broad ; involucre pubes- 
cent, the Hnear-lanceolate scales in 1-2 series, subequal, as long as the disk ; 
rays whitish, (yellowish-white, Nuttall ;) achenia pubescent ; outer setse of 
the pappus minutely subulate.— Oregon. Uintas, on the divide west of Du- 
chesne Eiver, and on a ridge above Bear Eiver Canon ; 10,000 feet altitude ; 
July, August. (546.) 
Eeigeeon stenophyllum. Smooth; caudex perennial, woody, branched, 
erect or assurgent ; stems many, strict, 6-9' high, sparingly branched toward 
the summit; radical leaves crowded, hnear-spatulate or fihform, 1-nerved, 
with the petiole 1-2' long, i-^" wide, the cauline gradually smaller, filiform, 
the uppermost minute and bractlike ; heads one or few, 5-6" wide ; involu- 
cre and peduncles glandular-puberulent, the scales loosely imbricated in 
several series ; the outermost minute, inner ones oblong-linear, acute ; rays 
blueish, 20-30, twice as long as the disk ; style of the disk-florets with 
rather acute hispid appendages nearly as long as the stigmatic portion ; ache- 
nia 2-nerved, sparsely hispid ; pappus of 15-16 unequal barbellate set^e, nearly 
as long as the disk-corollas, and a few minute subulate ones intermixed.— 
Rocky gulch above Cottonwood Canon, Wahsatch Mountains ; 8-9,000 feet 
altitude; August. Plate XVII. Fig. 8. Plant; natural size. Fig. 9. Invo- 
ke ral scales. Fig. 10. Ray-flower; enlarged four times. Fig. 11. Stigmas 
of the same; enlarged sixteen times. Fig. 12. Disk-flower; four times en- 
larged. Fig. 13. Achenium. Fig. 14. Corolla ; expanded. Fig. 15. Anther; 
each enlarged eight diameters. Fig. 16. Style; enlarged sixteen diameters, 
but incorrectly drawn, and showing the stigmatic portion much too long, and 
the appendages too obtuse. The place for tliis plant is in Pseuderigeron with 
