234 COMPOSITiE. Linostris. 



5. L. graveolens : shrubby, very much branched ; branches pulverulent- 

 tomenlose, wliiiish ; leaves very narrowly linear, 1-nerved, glabrous ; heads 

 (large) 5-llowered, clustered; scales of the hivolucre lew, loosely imbricated 

 in about 3 series, glabrous, carinate ; the outermost very short, ovate-oblong ; 

 the innermost elongated, linear; pappus very fine and capillary ; corolla gla- 

 brous. — Chrysocoma dracunculoides, Pttrsh ! fl. 2. p. 517, excl. char., which 

 chiefly relates to L. punctata. C. graveolens, Nutt. ! gen. 2. p. 136. Bige- 

 lowia dracunculoides, DC. prodr. 5. p. 329. Chrysothamnus dracuncu- 

 loides, Nuft. in trans. Amer. jMl soc. I. c. ]}. 324. 



(3. leaves and the outermost scales of the involucre, as well as the branches, 

 more or less tomentose-pubescent. — Chrysocoma nauseosa, Pursh, I. c. ? 

 Bigelowia Missouriensis, DC. I. c. Chrysothamnus speciosus, Nutt. ! in 

 trans. Amer. phil. soc. I. c. (excl. var. /3.) 



On the denudated banks of the Missouri, Platte, &c. Leicis! Nuttall! and 

 plains in the Rocky Mountains, Nuttall ! Aug.— Shrub 3-5 feet high, with 

 a heavy and unpleasant, though somewhat aromatic odor; with numerous 

 virgate branches, like the common Broom. Flowers abundant, brilliant 

 yellow. Nutt. — Heads narrow, nearly half an inch long. Corolla a little 

 longer than the fine and scarcely scabrous, unequal and copious pappus, 

 sHghtly dilated upwards ; the lobes" about one-fifth the length of the undivided 

 portion. Stamens inserted low down in the tube. Appendages of the style 

 linear-subulate, longer than the stigmatic portion. Leaves 2-3 inches long, 

 about a line wide. 



6. L. alUcaulis: stem and branches densely lanate-tomentose, white; 

 leaves very narrowly linear, tomentose-pubescent (at length glabrous ?), 

 1-nerved; tube of the corolla beset with very fine long villous hairs! — 

 Chrysothamnus speciosus (i. albicaulis, Nutt. I. c. Chrysocoma nauseosa, 

 Pursh, I. c? 



Rocky Mountain plains near Lewis River &c., Nuttall! — Resembles the 

 preceding very perfectly, except in the characters pointed out. Mr. Nuttall 

 remarks "that it is perhaps a distinct species; without noticing, however, the 

 character upon which we should chiefly rely for distinguishing them ; viz. 

 the long cobwebby hairs of the corolla. 



7. L. viscid'iflora (Hook.) : shrubby, glabrous ; leaves narrowly linear, 

 1-nerved, rigid, very acute ; heads more or less clustered, fastigiate-corym- 

 bose, 5-flowered ; scales of the oblong involucre glabrous, often glutinous, ob- 

 long or oval, carinate-concave, few, rather loosely imbricated in about 3 

 series ; the exterior very short ; corolla glabrous. — Hook. fl. Bor.-Am. 2. p. 

 24, under Crinitaria. Bigelowia viscidiilora, DC. jnvdr. l.p. 279. 



/?. " involucre ovate, the scales ovate and short." — Chrysothamnus pumi- 

 lus /3. enthamioides, Nutt. I. c. 



J. dwarf, much branched from the base, minutely pulverulent-pubescent 

 or nearly smooth. — Chrysothamnus pumilus, Nutt..' I. c. 



Barren plains of the Oregon, from the Great Falls to the Mountains, &c. 

 Douglas! Lewis River and plains of the Rocky Mountains, Nuttall /—The 

 plant described by Hooker is said to be a common shrub, 2-4 feet high, in the 

 region where Mr. Nuttall obtained his Chrysothamnus pumilus : the latter 

 is called a low shrub, about 6 inches high, and described as either glabrous 

 or pulverulent-pubescent, with the involucre either smooth or glutinous ; so 

 that nothing of any consequence is left to distinguish it from Hooker's plant, 

 of which we have seen no specimens. The heads are much smaller than in 

 the preceding; the pappus of firmer hairs, and more scabrous ; but the habit 

 and structure of the plant nearly the same. 



X Doubtful Species. 

 8. L. 7 humilis (Hook., under Crinitaria) : branches sparsely and slightly 



