WYETHiA COMPOSITE*; 341 



BELCANTHELLA 



bearing a single large head, or rarely 3 or 4: leaves Jiona oval to brokdly 

 lanceolate, denticulateorentire mostly narrowed at base to a short margined 

 petiole, 4-8 inches long : bracts of the involucre numerous, narrowly lanceo- 

 late, liispid-ciliate, usually with more or less colored tips : rays pale yellow 

 to white, nearly 2 incites long : achenes 4 lines long, either prismatic-quad- 

 rangular or flattish, 12-nerved : pappus shorter thau the width of the achene, 

 sometimes minute, chaHycoroniform and cleft into few or several teeth. 

 In moist valleys, eastern Oregon to the northern Kocky Mountains. 



W. ainiAexicanlis Nutt. 1. c. Glabrous and smooth throughout, balsamic- 

 viscid: stems stout, 1-2 feet high, simple: leaves mostly lanceolate-oblong, 

 entire or denticulate; radical 7-15 inches long by 3-4 broad, contracted be- 

 low to a short winged petiole; upper cauline2-6 inches long, partly clasping 

 by a rounded or subcordate base; heads solitary or several, short- peduncied : 

 involucre campauulate, about an inch high, fts bracts broadly lanceolate, 

 acuie or obtuse, often some of the outer ones larger and foliaceous: rays (5-20, 

 1-2 inches long, dark yellow ; achenes 3-^5 hues long : pappus unequally ,S-8- 

 toothed, one or two of the teeth often prolonged into awns. Common in wet 

 places, British Columbia to Nevada and the Rocky Mountains. 



W. lauceolata. Smooth and glabrous throughout : stems assurgent, 6-13 

 inches long, bearing a single large head : leaves lanceolate, 2-6 inches long, 

 entire or obscurely dentate, all on short petioles or the uppermost barely 

 sessfle: bracts of the involucre lanceolate, 10-12 lines long, acute, or the in- 

 nermost acuminate: raya bright yellow lJ^-2 inches long: pappus a cup or 

 crown with very irregular laciniately cut teeth. In damp grounds. Blue 

 Mountains of Uregon. 



W. robnsta Nutt. I.e. W. arajrusiifo/ioof authors as to the Oregon plant, 

 Moreorleas villous-hirsute: stems stoutish, 1-3 feet high, mostly erect, 

 leafy, bearing a single large head; radical leaves narrow-lanceolate, 6-20 Inch- 

 es long, petioled, often sparingly sinuate-toothed; cauline lanceolate, acute, 

 entire, tapering to the base, the lowest petioled : bracts of the involucre 

 lanceolate, very hirsute, especially on the margins : pappus of 5-10 irregular 

 stout teeth and mostly 1-4 stout awns. Common in damp soil, western 

 Oregon and Washington. 



42 HELTANTHELLA T. & G. Fl. ii, 333. 



Perennial herbs with mostly simple stems, entire scattered 

 and sessile leaves and solitary heads with yellow ray and yellow 

 or purplish-brown disk-flowers. Heads many-flowered, the ray- 

 flowers neutral: those of the disk perfect. Bracts of the involucre 

 in about two series, loose, somewhat foliaceous. Chaff of the re- 

 ceptacle persistent, embracing the achenes. Corollas of the disk 

 cylindrical, elongated, S-toothed, with a very short proper tube, 

 branches of the style very hispid, more or less obtuse. Ovaries 

 compressed, with one' or both margins slightly winged and pro- 

 duced at the summit into a short auriculate arid lacerate per- 

 bisteni, appendages or an awn, sometimes with intermediate: 

 squamellae. 



H. nniflora T. & G. 1. c. "Minutely pubescent or somewhat scabrous 

 or glabrate, 1-2 feet high : leave.i more commonly opposite, sometimes all 

 attenuate, oblongoblanceolate, 2-6 inches long: lower short-petiqled: invo- 

 lucre pubescent or slightly hirsutfi : rays a full inch long : achene more or 

 less ciliate: pappus a pair of long awns ami rather conspicuous squBmellse. 

 Eastern Oregon to the Rocky Mountains." 



