152 BOTANY. 



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.) 



Erigeeon 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 ; cauline ones smaller, sessile ; 

 heads terminal, solitary, or 3-5 on a stem, about 8" broad ; involucre pubes- 

 cent, the linear-lanceolate scales in 1-2 series, subequal, as long as the disk ; 

 rays whitish, (yellowish-white, Nuttall ;) achenia pubescent ; outer setee of 

 the pappus minutely subulate. — Oregon. Uintas, on the divide west of Du- 

 chesne River, and on a ridge above Bear River Cafion ; 10,000 feet altitude ; 

 July, August. (546.) 



Erigeron stenophyllum. Smooth; caudex perennial, woody, branched, 

 erect or assurgent ; stems many, strict, 6-9' high, sparingly branched toward 

 the summit ; radical leaves crowded, linear-spatulate or filiform, 1-nerved, 

 with the petiole 1-2' long, ^-|" 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, 20-80, 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 setae, 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- 

 lucral 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. Corolk; 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 this plant is in Pseuderigeron with 



