14 Rhodora [JANUARY 
Mary E. Priest, and containing several plants heretofore unknown 
from Newfoundland, is a dwarf and lanate large-headed tansy with 
almost scapose stems less than 1 dm. in height. Miss Priest’s plant 
is identical with specimens collected by Fernald, Wiegand & Kittredge 
in 1910 on dry limestone barrens fifty miles to the south, on the 
shores of Ingornachoix Bay. The Newfoundland plant seems to 
be an extreme variation of Tanacetum huronense Nutt., which in its 
typical form occurs from the St. John Valley in New Brunswick to 
Hudson Bay and Lake Superior and it is here proposed as: 
TANACETUM HURONENSE Nutt., var. terrae-novae, n. var., a forma 
typica recedit habitu subscaposo, caule 0.7-1.3 dm. alto lanato; 
foliis confertis 3.5-9 cm. longis subtus albido-tomentosis vel -lanatis, 
segmentis confertis; capitulis 1-3; involucro lanato. 
Differing from the typical form of the species in its subscapose 
habit; the stem 0.7-1.3 dm. high, lanate, 1-3-headed; leaves crowded 
at the base of the stem, 3.5-9 cm. long, white-tomentose or -lanate 
beneath, their segments crowded: involucre lanate.—NEWFOUND- 
LAND: dry rocky limestone barren, near sea-level, Ingornachoix Bay, 
August 2, 1910, Fernald, Wiegand & Kittredge, no. 4162 (rype in 
Gray Herb.); coast, Flower's Cove, July 26, 1921, Mary E. Priest, 
no. T, 4. 
The typical continental form of the species has stems 2.5-8 dm. 
high, with remote leaves mostly 1-3 dm. long. It is much greener 
and less pubescent throughout and the stems bear 1-8 heads. 
It is not impossible that Tanacetum huronense should be treated as 
a variety of T. bipinnatum (L.) Schz.-Bip., which extends from 
Russian Lapland across northern Asia to Alaska and the Mackenzie. 
The characters relied upon by Rydberg in the North American Flora to 
separate the two seem sufficiently clear: 
"Ligules erect or ascending, decidedly concave; 
heads several........ E eph xn ou 2. T. huronense” 
“Ligules spreading, flat; heads 1-4............... 4. T. bipinnatum”! 
but unfortunately the description of the ligules as “ decidedly concave" 
must have arisen through study of poorly dried material. The writer 
has intimately known T. huronense for thirty years, making his first 
collections of it in 1893, his latest in 1922, with six other collections 
in the interval, and he has not noticed any conspicuously * concave" 
character. The ligules are often inconspicuous but in the same areas 
they may become quite obvious; for instance, Fernald & Long's no. 
! Rydb. N. A. Fl. xxxiv. 238 (1916). 
