420 . WiEGAND : Some SrECiES of Bipens 



ascending, longer than the leaves and all borne above the middle 

 of the stem : leaves simple, small or of rriedium size (7—13 cm.) 



lanceolate or more commonly eUiptic-lanccolate, glabrous, scarcely 

 paler beneath, more or less contracted toward the sessile base, 

 rarely clasping, acute or short acuminate, serrate with small incon- 

 spicuous teeth, rarely the upper slightly connate : heads of medium 

 sl/e (disk 15-22 mm. broad) on long (3-10 cm.) slender pedicels, 



globular or rarely in fruit broader than high ; outer involucral 

 bracts y-S, equaling or but slightly longer than the disk, bracts 

 linear to spatulate-lincar, slightly ciliate or glabrous, nearly equal, 

 slightly fleshy, obtusish, appressed or spreading, often crisp-wavy 

 in drying; inner bracts about 8, oval, stramineous, equaling the 

 disk ; chaff usually reddish-tipped : ray flowers present, the ligule 

 very large (2-3 cm. x 8-14 mm.), elliptical or oval, rounded at 

 the apex, golden-yellow : ovaries short-oblong, glabrous except 

 the retrorse margin, summit truncate, awnless : corolla of the disk 



flowers deep-yellow, large (4.5-5 ^^^^^- long), equaling or exceed- 

 ing the awns, campanulate-oval above, very abruptly contracted 

 into a basal portion which is slightly longer than the upper, lobes 



5, spreading : stamens long-exserted : achenes in fruit (6-9 mm. 

 long) evenly cuneate from the summit, not dilated at the top, 

 glabrous, flattish or rarely slightly carinatc on one face, strongly 

 and almost serrately retrorse on the margins, olive-green, convex 

 at the summit : awns 2-4, /^-/^ the length of the achene, down- 

 wardly barbed. 



Massachusetts to Georgia (?) along the coast, and in Central 



I 



New York, Possibly also in Mexico. ' 



Specimens examined from : — Massachusetts : Boott ; Essex Co,, 

 Oakcs ; Dedham, Harris ; Acton, Swan ; Andover, Yoioig ; 

 Rhode Island : Tlatrbcr. New York : Cayuga Marshes, Clinton ; 

 Oswego Co., Rou'Icc ; Torr. Herb. (N. Y. ?). New Jersey : Pog- 

 gcnburg (?) ; Hudson Co., Hcxanicr and Maicr (anomalous); Brin- 

 ton, Delaware : Brittou^ TatnalL Virginia : Hollick and Britton, 

 North Carolina, Diinviddcc at Raleigh. 



B, lacvis as here limited contains a group of very similar forms. 

 They are characterized by a more slender habit than />. ccrnua, 

 and more ascending branches all near the summit of the stem ; 

 the leaves are smaller, the involucral bracts decidedly shorter and 

 thicker, and the achenes are less strongly carinate ; but what is 

 still more important, the whole plant when in flower has a dis- 

 tinctly helianthoid appearance quite distinct from />. ccrnua. The 

 character as to whether the heads are cernuous or not Is of some- 



