348 COMPOSITE. BalsamorUza. 



1. B. Hookeri, Xutt. Canescent with fine mostly soft and close pubescence : 

 leaves usually once or twice pinnately parted or divided, lanceolate in outline, a 

 span to a foot long, spreading ; the divisions crowded, commonly incised : scapes 

 naked or 2-leaved near the base, equalling or surpassing the leaves in length, bear- 

 ing a single head : scales of the involucre linear or lanceolate, acuminate, rarely 

 some of the outermost broader and foliaceous. Hdiopsis (?) balsamorhiza & tere- 

 binthacea, Hook. Balsamorkiza Hookeri, terebinthacea, hirsuta, & incana, Nutt. in 

 Trans. Am. Phil. Soc. n. ser. vii. 349. 



Hills near Oakland, Kellogg. Near Sonoma, Bigelow (wrongly named B. macrophylla). On 

 the eastern side of the Sierra Nevada, Bloomer, Anderson, Lernmon. Common on the plains of 

 Nevada, Oregon, &c. B. hirsuta is a form with more hirsute pubescence : B. incana, a variety 

 remarkable tor its soft and white wool : B. terebinthacea, with roughish pubescence, has some 

 of the leaves merely incised or sharply toothed, others pinnately-parted or pinnatifid. 



2. B. sagittata, Nutt. Silvery-canescent with dense mostly appressed soft 

 wool : leaves entire, cordate-sagittate or sometimes deltoid-hastate, 4 to 9 inches long, 

 on still longer petioles, all radical, or one or two small lanceolate petiolate bracts on 

 the scape, which bears a single or sometimes 2 or 3 heads : involucre mostly very 

 woolly. Buphthalmum sagittatum, Pursh. EspeJ,etia sagittata & helianthoides, 

 Nutt. in Jour. Acad. Philad. vii. 38. Balsamorhiza (Artorhiza) sagittata & heli- 

 anthoides, Nutt. in Trans. Am. Phil. Soc. 1. c. 



Eastern side of the Sierra Nevada, on the borders of the State, &c. (.Anderson, Bloomer, Wat- 

 son) ; thence to and beyond the Kocky Mountains from Colorado to Idaho and Dakotah. 



3. B. deltoidea, Nutt. Green and more or less pubescent, or almost glabrous : 

 leaves deltoid-cordate or more broadly and deeply cordate, more or less serrate, occa- 

 sionally entire, 3 to 9 inches long and on longer petioles, all radical, or 2 or 3 small 

 ones or bracts on the scape : heads solitary or rarely a pair : scales of the involucre 

 lanceolate or linear, obtuse. B. glabrescens, Benth. PI. Hartw., is only a smoothish 

 form, with leaves entire. 



Moist ground, from Tejon and Ojai to Humboldt Co. and Oregon. Akenes flat, those of the 

 disk compressed ; of the ray obcompressed, as they are in all these species. 



4. B. Bolanderi, Gray. Glabrous or glabrate, somewhat glutinous ; a span to 

 a foot high, with mostly scales instead of leaves from the rootstock : leaves about 3, 

 alternate along the stout stem, cordate or ovate, entire, 3 or 4 inches long, on 

 moderately long petioles : head solitary, short-peduncled ; outer scales of the invo- 

 lucre oval or ovate-lanceolate, acuminate or acute, foliaceous ^ the inner ones nar- 

 row and very villous, resembling the chaff of the receptacle. Proc. Am. Acad. 

 vii. 356. 



Auburn (Bolander), and on the Upper Sacramento, Fremont, Rich. Head large. Akenes flat, 

 of the disk compressed, of the ray obcompressed. 



45. WYETHIA, Nutt. 



Head many-flowered, heterogamous, with fertile ray-flowers and perfect disk- 

 flowers. Involucre hemispherical or campanulate, of 2 or 3 series of scales ; the 

 outermost foliaceous and often enlarged, the innermost mostly smaller and chaffy. 

 Receptacle flat or nearly so ; the rigid linear or lanceolate chaif subtending the disk- 

 flowers flattish or partially folded around the akenes. Rays elongated : disk-corollas 

 cylindrical, 5-toothed, glabrous or nearly so. Branches of the style in perfect 

 flowers produced into subulate-filiform hispid appendages. Akenes prismatic-quad- 

 rangular, or those of the disk laterally compressed, and with obtuse or acutish 

 angles, nervose, their broad summit continued into a persistent and firm chaffy-cori- 

 aceous crown or cup, which is unequally cleft into 5 or more lobes or teeth, or is 



