AND GENERA OE PLANTS. 323 



Hab. Banks of Lewis' River, and other streams of the Oregon. Allied to, bat very distinct 

 from the precedins, with the same elonffated, hirsute stisrmas. A low, branching, somewhat spiny 

 shrub, about half a foot high. Leaves about an inch long, two to three lines wide. Scales of the 

 involucrum lanceolate-linear, part of the outer series resembling the leaves as in the preceding spe- 

 cies : florets about twent\--five ; achenia very glabroos, slightly striated, linear-oblong. 



BIGELOAVIA. (Decand.) 



Obs. — Involucrum three to four-flowered; branches of the stigma short, 

 scarcely exserted, ligulate, the apex sublanceolate, puberulous. — Low herbs 

 with large radical leaves and scapoid, almost naked stems ; branches corymbose. 



Bigehma niidata and B. virgata. 



Hab. On the borders of sandy, shallow ponds, from Tirginia to Florida. The B. nudata as 

 far north as Xew Jersey. 



*CHRYSOTHAMXrS. 



BiGELowiA. bat with the receptaculum naked. Capitulum five to eisrht-flow- 

 ered; branches of the stigma fihform, cTlindric,. exserted, acute,, pubescent 

 nearly their whole length. — Very branching shrubs of the western interior 

 and Rocky Mountain plains, with entire, equal, linear leaves, and fastigiately 

 clustered flowers. Most of the species more or less resinous, and with a 

 heavy aromatic odour. — (Named from their affinity to Chrysocoma, and bril- 

 liant CTolden vellow flowers.) 



Chrysothamnus "^pumilus: shrubby, dwarf, smooth or pulverulently pubes- 

 cent; leaves narrow linear, acute, partly three-nerved: involucrum about five- 

 flowered. 



Hab. On the borders of Lewi*" River and the Rocky Moimtain plains. A low shrub, much 

 branched from below, about sis inches high; flowers in terminal, fastigiate clusters. Involucrum 

 smooth or glutinous. 3. *Eutharfdoides: involncnim ovate, the scales ovate and short Perhaps 

 a distinct species. 



Chrysothamnus *sjptciosus: shrubby and virgately branched; leaves narrow, 

 linear, acute, more or less tomentose: capituli in dense, conglomerate, terminal 

 clusters, five-flowered; style hirsute, elongated; pappus copious, scarcely sca- 

 brous. 



