24 Rhodora [JANUARY 
or terminal lobe lanceolate or narrowly ovate, 2.5-12 cm. long, sharply 
and coarsely serrate: heads discoid or radiate: involucre with 3-6 
linear-lanceolate elongate foliaceous bracts, glabrous at base or 
sparsely ciliate; interior bracts oblong, obtuse, straw-colored, black- 
striped, 7-9 mm. long: pales linear, 4-striped: achenes flat, strigose, 
2—4-awned, the margin and awns upwardly barbellate; marginal 
cuneate, 4.5 mm. long, 1.8 mm. wide, with awns 1.5 mm. long; I- 
terior 6-7 mm. long, scarcely 2 mm. wide, the awns 2-3 mm. long.— 
Besides the stations originally cited the following may be noted. 
Prince Epwarp Isianp: border of fresh pond (recently an arm of the 
sea) back of sand hills, Tracadie, August 22, 1914, Fernald & St. John, 
no. 11,210 (radiate form). QueBEC: sandy sea strand at the Narrows, 
Alright Island, Magdalen Islands, August 21, 1912, Fernald, Long & 
St. John, no. 8317 (broad leaved form with 4 awns 3 
B. HETERODOXA, var. orthodoxa, n. var., aristis achaeniorum re- 
trorse setosis. 
Awns of the achene retrorsely barbed.— QueBeEc:, shallow water 
near the margins of brackish ponds, southwest of Etang du Nord 
village, Grindstone Island, Magdalen Islands, August 15, 1912, 
Fernald, Long & St. John, no. 8203 (rrp in Gray Herbarium); boggy 
margin of strand at the Narrows, Alright Island, August 21, 1912, 
Fernald, Long & St. John, no. 8204. 
In characteristic Bidens connata Muhl. the blades of the middle 
cauline leaves or the terminal lobes of the divided leaves have 10-20 
sharp serrations on each margin, and the outer foliaceous bracts of the 
involucre are linear or linear-oblanceolate and inconspicuous, usually 
not more than 2 mm. broad and but slightly exceeding the inner 
involucre. On Block Island occurs a characteristic extreme in whic 
the primary leaves are coarsely and irregularly dentate with 5-10 
teeth on each margin and with the outer foliaceous bracts as large as 
in B. comosa (Gray) Wiegand, usually oblanceolate, the larger 3-6 cm. 
long and 0.5-1.5 em. broad. A plant quite identical with this Block 
Island extreme has been collected by Mr. E. F. Williams at Lake 
Massapoag in Sharon, Massachusetts, indicating that the plant 1s of 
somewhat wide distribution in southern New England. This extreme 
plant with achenes as in B. connata, but with foliage and involucre 
similar to those of B. comosa may be called = 
B. connata Muhl., var. fultior, n. var., foliis primariis laminis vel 
lobis terminalibus grosse inaequaliterque dentatis, dentibus utrinque 
10; involucri bracteis foliaceis oblanceolatis, majoribus sind 
longis 0.5-1.5 cm. latis; aristis achaeniorum 4—6.— MassacHUSETT®” 
Lake Massapoag, Sharon, September 10, 1899, E. F. Williams. RuwoP 
