1924] Fernald,—Some Senecios of Eastern Quebec 117 
and lobes; by its comparatively low stature (1 to rarely 5.5 dm.), few 
(1-6, more rarely -11) broadly campanulate heads with usually 
purple involucres, and disk-corollas with orange-red or deep-red lobes. 
The other species (fig. 3) is the plant figured and described in Britton 
& Brown, Illustrated Flora, iii. 479, fig. 4042, as S. discoideus.! "This 
plant should, however, be called S. indecorus Greene, since Hooker's 
S. aureus, à discoideus, upon which S. discoideus rests, proves to 
be S. pauciflorus. Unlike S. pauciflorus, S. indecorus is not an 
arctic-alpine plant, but it occurs in the Canadian forest at low levels, 
from Gaspé County, Quebec to the Lake Superior region and at 
comparatively low altitudes from southern British Columbia to 
Idaho and northeastern California. In Quebec, where I have been 
familiar with the two species:for twenty years, S. indecorus occurs 
in thickets and woodland-swamps or on talus and cool ledges of 
limestone; and in the field it is at once distinguished from the alpine 
and subalpine S. pauciflorus by its thin or membranaceous basal 
leaves sharply lacerate-pinnatifid and rather numerous cauline leaves, 
tall stature (up to 9 dm.), more numerous (6—40) slenderly cylindric- 
urceolate heads with green or merely purple-tipped involucres and 
yellow flowers. 
In S. indecorus the filiform tube of the corolla is 3.6-6 mm. long, in 
S. pauciflorus only 3-4 mm.; and in the former the slender, strongly 
costate achenes (fig. 3d) are 2-3 mm. long, the plumper, less promin- 
ently ribbed and darker achenes of S. pauciflorus (fig. 2d) being 
3-3.5 mm. long. When the heads are quite mature the bracts of 
the involucre of S. pauciflorus (fig. 2c) spread or become only slightly 
reflexed, exposing a smooth and nearly flat denuded receptacle 
(fig. 2b), but in S. indecorus the mature and narrower bracts (fig. 3c) 
become strictly reflexed and the convex receptacle (fig. 3b) is con- 
spicuously alveolate, the walls of the pits very thin and jagged or 
almost fimbriate. 
Although the heads of S. indecorus are normally discoid, they, like 
those of S. pauciflorus, are sometimes radiate and plants of both forms 
sometimes occur in the same colonies. These radiate individuals 
1 S. discoideus Hook. ex Torr. & Gray, Fl. ii. 442 (1843) is usually cited as S. dis- 
coideus (Hook.) Britton, 1. c. (1898), but the combination was actually published and 
ascribed to Hooker in 1843. 
2 The character, “discoid " or “radiate,” is very unsatisfactory in Senecio. In the 
species of northeastern America the ordinarily radiate S. aureus L., S. Robbinsii 
Oakes, S. pauperculus Michx., S. obovatus Muhl. and S. resedifolius Less., in addition 
to those above discussed, are occasionally discoid. 
