A FASCICLE OF SENECIOS. 109 
campanulate, little more than } inch high: rays numer- 
ous but short, all the flowers light-yellow. 
A member of the difficult group of which S. aureus is 
typieal, but well enough marked by its small size, prevail- 
ingly cordate-ovate acute small leaves, and short broad 
heads of light yellow flowers. Such densely white-lanate 
margins to the petioles are not seen in other allied species. 
The plant was collected by Mr. Carl F. Baker, at Arboles, 
southern Colorado, 15 June, 1899; the habitat is said to be 
damp shady places along streams. 
S. DIMORPHOPHYLLUS. Stems a foot high more or less, 
from short erect rootstocks; herbage wholly glabrous, light- 
green and apparently in some degree succulent: basal leaves 
mostly about an inch long, ovaland nearly or quite entire, 
on flat somewhat winged petioles of about the same length, 
these commonly much dilated at the insertion, or some 
spatulate throughout, with no distinction of blade and 
petiole; cauline few, scattered, triangular, sessile and clasp- 
ing, from coarsely crenate to deeply sinuate-toothed : heads 
few, mostly 3 to 5, rather closely corymbose; involucres 
subeampanulate, only 3 or 4 lines high, rays numerous and 
much longer, golden-yellow. 
In spruce woods toward the limit of trees, at 10,500 feet in 
the mountains of southern Colorado about Pagosa Peak, 
collected 6 Aug., 1899, by C. F. Baker. A member of the 
S. aureus group, and a similar but smaller plant of northern 
Colorado, with rays saffron-colored, forms a part of the S. 
aureus var. croceus, Gray. The contrast is very marked be- 
tween thesmall always rounded and obtuse basal leaves, and 
the broad triangular pointed ones of the stem. 
S. VALERIANELLA. Plant glabrous and the herbage thin 
and delicate, the rootstocks slender and densely tufted, 
bearing numerous and crowded slender-petioled erect leaves, 
the blade not half the length of the petiole and about ? incli 
