408 WiEGAND : Some Species of Bidexs 



4. I^iDExs FROXDOSA L. Sp. PL 832. 1 753- 



r 



Also of Willd. (in part) ; Torn FL N. U. S. (in part) ; Bige- 

 low FL Bost ; T. & G. Fl. N. A. 



Stem tall and branching, glabrous, furrowed, reddish, branches 



spreading ; leaves pinnately 3-5-foliolate (commonly 5-) on slender 

 marginless petioles (2-4 cm. long), scarcely paler beneath, glab- 

 rous or nearly so, the straight veins prominent; leaflets lanceo- 

 late, tapering evenly to the very acute apex, serrate, with numer- 

 ous sharp or bluntish regular teeth, all abriiptly contracted at the 

 base and short-stalked, the lateral oblique ; rachis narrowly mar- 

 gined : heads large (15-25 mm. broad), broader than high, on long 

 stout peduncles (3-16 cm.) ; outer involucral bracts linear or nar- 

 rowly spatulate, unequal, numerous (10-16), scarcely exceeding 

 the disk (rarely twice as long), conspicuously ciliatej entire ; inner 

 bracts brownish-olive, 14-1 S, mostly ovate or narrowly triangular, 

 often abruptly contracted at the pubescent apex, mostly shorter 

 than the disk : ray flow^ers usually present, ligule elliptic-oval, 

 equaling the disk, pale yellow^ or often whitish, caducous, the ovaries 

 5-6 mm. X 1)4-2 mm.), cuneatc, broader and shorter than in B, 

 Diclaiiocarpa^ slightly contracted at the sunniiit^ truncate, awnless, 

 ^ entirely glabrous except occasionally a few upward barbs on the 

 margins near the summit: corolla of the disk flowers of medium 

 size (2.5-4 mm.), funnelform, pale yellow, 4-5 -toothed, not con- 

 spicuously contracted below, two thirds length of awns, basal 

 portion shorter than the upper : stamens usually included : achenes 

 in fruit large, very flat and broad (7.5-9 mm. x 4.5-5 mm.), 

 cuneate, slightly contracted at the summit, brown or olivaceous^ 

 smooth or merely papillose, nearly glabrous, i -nerved on each 

 face, margins downwardly barbed on the upper fourth, hairs erect 

 below, summit truncate, awns 2, erect or divaricate, ^ length of 

 the achene or more, strongly downwardly barbed. 



Ontario to North Carolina, Missouri and westward to Cali- 

 fornia and British Columbia. 



F 



Spccirhcns examined from: — Ontario : Hull, Macoun, 1889. 

 New York : Barrett^ Brittou^ DiiBois, Toivnscnd, Wicgaud, ct aL 

 Pennsylvania : Moscr. Kentucky : Short. Virginia : Otrtiss. Illi- 



- , • 



nois : DtForcsf. Wyoming : Nelson^ no. 2749. Upper Platte^ 

 Torn Herb. CaUfornia : Bidwcll, no. 328. Washington : Col- 

 umbia ^wqv^ Snksdorf^ nos. 412 and 1591. 



h 



Bidens frondosa puberula var. nov. 



I + 



Branches, leaves and involucre more or less finely crisp-pubes- 

 cent, with whitish hairs, the last often densely ^so ; inner bracts 



