1913] Robinson,— Erigeron pusillus a valid Species 207 
region, while disclosing great variability in such matters as stature, 
number of heads, etc., has failed to show a single specimen of E. 
pusillus Nutt.— a matter by no means surprising in consideration of 
the generally coastal distribution of the species. It is to be inferred 
therefore that the plant to which Prof. Daniels referred was merely 
a starved and depauperate state of the common E. canadensis L. 
An examination of E. canadensis L. as it occurs in the southwestern 
part of the United States indicates that Dr. Gray's long neglected var. 
glabratus is capable of recognition and worthy of more careful restate- 
ment as to character and range. 
Much more doubtful is E. strictus DC., originally collected by 
Berlandier near the boundary between Texas and Mexico. In all 
matters of foliage, pubescence, involucre, etc., it appears to be indis- 
tinguishable from E. canadensis, yet it may be worth while to draw 
attention to the compact thyrsoid almost spicate form of the young 
inflorescence in the type material of E. strictus, since the young in- 
florescence in E. canadensis is commonly rather loose and open. 
However, while this is a matter which should be watched by those 
who have opportunities to study southwestern specimens of the group, 
the material at present available of the so-called E. strictus DC. is not 
sufficient to show whether this distinction of the young inflorescence 
has any value in classification. For the present E. strictus DC. would 
better be included as heretofore in the synonymy of E. canadensis L. 
Of the other synonyms of E. canadensis, it is clear that E. panicula- 
tus Lam. is a mere renaming of the Linnaean species, and Senecio 
ciliatus Walt., described as pilose and 6-8 feet high, was doubtless 
E. canadensis L. rather than E. pusillus Nutt. 
The plants here discussed may be summarized as follows: — 
Involucral scales minutely purple-tipped.............. esee E. pusillus. 
Involueral seales with attenuate whitish tips. 
Stems spreading-hirsute. Heads cymosely disposed in panicle. 
E. canadensis. 
Stems glabrous or with few scattered appressed short hairs. Heads quasi 
racemose on long branches of panicle...... E. canadensis, v. glabratus. 
E. PuUsILLUS Nutt. Stem .08-1 m. high, nearly or quite glabrous, 
the trichomes if present minute and subappressed: leaves mostly 
oblanceolate-linear and very narrow, the earliest lance-oblong, the 
upper linear, all entire, ciliate at least toward the contracted base: 
inflorescence inclining to be open; involucral scales straight, nearly 
or quite glabrous, with regular (not crisped) white subscarious margins, 
the tip slightly bluntish (under a lens), obscurely fimbriolate and 
