22 Rhodora [JANUARY 
acute, 1.5-4 cm. long; interior bracts oblong, subacute, yellow, 
brown-striate: pales narrowly oblong, yellow, obscurely pale-striate: 
achenes narrowly cuneate, flat, conspicuously about 9-striate on each 
side, retrorsely setose, 2(very rarely 3)-awned; the awns 2.5-3 mm. 
long, retrorsely barbed; outer achenes 5 mm. long, inner 6 mm. long.— 
MAINE: among sedges and rushes of a salt marsh, and at tide limit 
at edge of marsh, Winnegance Creek, Phippsburg, August 23, 1909, 
Fernald & Wiegand (Fernald, nos. 2248 & 2249 — ryper in Herbarium 
of the New England Botanical Club); Cow Island, Topsham, August, 
1910, Kate Furbish; bank of Androscoggin River, Brunswick, August 
13, 1911, C. H. Bissell. 
Bidens frondosa, as it ordinarily occurs, has the teeth of the leaves 
broadly deltoid, usually as broad at the base as the total length, and 
the foliaceous bracts of the involucre rarely twice as long as the inner 
bracts. Occasionally plants occur with more slender teeth or with 
longer outer bracts, but these two extreme tendencies are rarely if ever 
found in combination in the continental range of the species. In 
Newfoundland, however, the only indigenous colonies yet known of B. 
frondosa have the teeth of the leaves very narrowly lance-attenuate, 
and the foliaceous bracts 2.5-4 times as long as the inner involucre; 
and on Prince Edward Island and the Magdalen Islands this same 
combination of characters occurs in plants of the natural swales and 
marshes, indicating that in this area, at least, the species has departed 
sufficiently from its more general tendencies to merit the separation 
of a geographic variety, 
B. FRONDOSA L., var. stenodonta, n. var., dentibus foliorum lanceo- 
lato-attenuatis, mediis 5-6 mm. longis; bracteis foliaceis involucri 
lanceolatis acuminatis plerumque 2.5-5 cm. longis. 
Teeth of the leaves lance-attenuate; the median 5-6 mm. long: 
the foliaceous bracts of the involucre lanceolate, acuminate, usually 
2.5-5 cm. long.— NEWFOUNDLAND, boggy open woods, Whitbourne, 
August 8, 1911, Fernald & Wiegand, no. 6375 (TYPE in Gray Her- 
barium); wet thickets, Norris Arm, August 21, 22, 1911, Fernald & 
Wiegand, no. 6376. QuEBEC: boggy margin of a brackish pond 
southwest of Étang du Nord village, Grindstone Island, Magdalen 
Islands, August 15, 1912, Fernald, Long & St. John, no. 8199. PRINCE 
Epwarp IsLANp: border of salt marsh, Bunbury, August 9, 1912, 
Fernald, Long & St. John, no. 8202. 
In 1913 attention was directed to a peculiar plant of the Magdalen 
Islands which was then identified with Bidens tripartita L. of Eurasia 
and of the Gaspé Peninsula of Quebec, and to a variety of the Magdalen 
