JALSAMORBHIZA OOMPOSITiE 339 



winged petiole: heads few, on long peduncles; rays wholly wanting: disk 

 hrownish. ovoid to oblong, becoming 1-2 inches long ; its chaffy bracts 

 puberalent at tip: aehenes 2 lines long, with conspicuous coronitorm sca- 

 brious pappus. Woods along streams, Oregon to California and the Rocky 

 Mountains. 



40 BALSAMORRHIZA Hook. Fl. i, 310 (under Heliopsis). 



Low perennial herbs with scape-like stems from thick tere- 

 binthine roots, mostly radical leaves and rather large mostly 

 solitary heads of yellow flowers. Heads many-fiowered, hete- 

 rogamous, with fertile ray- and perfect disk dowers. Involucre 

 hemispherical or broader, of more or less imbricated bracts, the 

 outer loose and herbaceous, or often foliaceous. Receptacle 

 flat or barely convex, with linear-lanceolate chaff subtending 

 and partly embracing .the aehenes. Rays oblong or lanceolate, 

 with short tube ; disk-corollas cylindrical. Style-branches of 

 perfect flowers slender, hispid, at least on the filiform appen- 

 dages. Aehenes of the ray flattened parallel with the bracts, 

 oblong ; of the disk prismatic-quadrangular or more or less 

 compressed. Pappus none. 



§ Kalliactis Gray PI. Fendl. 81. Ligules becoming thin- 

 papery, and persistent on or very tardily deciduous from the 

 canescently pubescent aehenes. 



B. Careyana Gray 1, c. " Cinereous-pubescent, slightly scabrous,: 

 flowering stems a foot high, bearing 3 or 4 small lanceolate leaves and 2 to 

 7 racemosely disposed heads: leaves subcoriaceous, entire reticulated ; the 

 radical cordate-lanceolate, a span or more in length : involucre half-inch or 

 more high: ligules oval, hardly inch long, abruptly contracted into a very 

 short but distinct tube: style-baanches of the disk-flowers subulate nd 

 very hisqid throughout. Sandy plains on the Clearwater Idaho, and on 

 the Wallawalla Washington, 



§ 2 Aetoehiza Nutt. 1. c. 350 Ligules deciduous. Aehenes 

 glabrous. Heads 1-3. Leaves entire or merely serrate, the 

 principal ones cordate or with cordate base and long petioled. 



B. sagittata Nutt. Proc. Am. Phil. Soc. vii, 350, Silvery-tomentulose 

 or canescent, and the involucre white-woolly; stems numerous from the 

 crown of the thick root, 6-20 inches high, erect or ascending, with a pair 

 of small linear to spatulate leaves near the middle : radical leaves from cor- 

 date-oblong to hastate, entire or nearly so, 4-10 inches long, the base 2-6 

 inches wide, on longer petioles : rays 1 to nearly 2 inches long. British 

 Columbia to California and the Rocky Mountains- 



B. deltoidea Nutt. 1. c. More or less pubescent or glabrate: stems 

 numerous from the crown of the thick root, erect or ascending, 5-20 inches 

 high, with a pair of small lanceolate leaves near the center : radical leaves 

 broadly cordate to cordately ovate-lanceolate, sometimes nearly deltoid, 

 from irregularly serrate to entire, 5-10 inches long, acute or shortly acu- 

 minate, very long-petioled, involucre woolly or tomentose at base : the 

 bracts in 2 series, longer than the disk, linear-lanceolate, the outer lar- 

 gest, foliaceons, spreading : rays 12-20, 1-2 inches long. Open ridges. Wil- 

 amette Valley to California. 



