LiNOSYRis. COMPOSITiE. 233 



2. L. Drummondii : much branched from the suflfrutescent base, glabrous, 

 the young heads and fastigiate branchlets somewhat glutinous ; stems terete; 

 leaves narrowly linear, tapering lo the base, thickish, obscurely 1-nerved ; 

 scales of the obovoid involucre closely imbricated in 4-5 series, rigid, lanceo- 

 late-oblong ; the outermost passing into subulate bracts ; corolla somewhat 

 exceeding the pappus, the slender tube longer than the cyalhiform 5-cleft 

 limb ; the triangular-lanceolate appendages of the style much shorter than 

 the sfigmatic portion. 



Texas, Dnunmond ! — Stems rigid, 8-10 inches high; the heads nearly 

 sessile and somewhat aggregated at the extremity of short terete branchlets. 

 Leaves an inch long and a line wide, crowded. Scales of tlie involucre either 

 glutinous, or slightly pulverulent at the apex, obtusish. Stamens inserted be- 

 low the middle of the tubular part of the corolla. Ovary silky-pubescent. — 

 The achenia are immature. — Another species of this continent, L. Mexicana, 

 is figured by Schlechtendal {Hortus Halensis, t. 4.), and is remarkable for 

 its toothed leaves. 



§ 2. Involucre sererrtZ-(6-10-20-) flowered, mostly shorter than the disk ; the 

 scales oval or oblong, concave or carinate : ajjpendages of the style triangu- 

 lar or deltoid-ovate, much shorter than the flat stigmatic portion. 



This division includes the Siberian L. punctata, L. villosa, (in which the heads 

 are only 8-lO-flowered), L. Tartarica, &c. ; in our specimens of the latter the heads 

 are only 5-7-flowered. 



3. L. pluri flora: frutescent ? glabrous; branches angular ; leaves very 

 narrowly linear, somewhat attenuate towards the base, obscurely 1-nerved ; 

 heads 15-18-flowered, crowded and subsessile at the summit of the small 

 nearly leafless branchlets, forming a compound fasciculate corymb; scales 

 of the involucre smooth and shining, oblong-lanceolate, acute, closely imbri- 

 cated, very unequal ; lobes of the corolla very much shorter than the tube ; 

 appendages of the style lanceolate-ovate, obtusish. — Chrysocoma graveolens, 

 Torr.! in ann. lye. "New York, 2. p. 211, not of Nutt. 



Upper Missouri or Platte ? l)r. James ! — The lower part of the stem is 

 wanting in our specimen. Leaves about 2 inches long, a line wide, obscurely 

 impressed punctate, and a little resinous. Heads densely clustered, one-third 

 of an inch long. Scales of the involucre small, coriaceous, with narrow sca- 

 rious margins. Pappus copious, unequal. Alveoli of the receptacle lacerate- 

 dentate. 



4. L. lanceolata : shrubby, cinereous-puberulent; branches terete ; leaves 

 linear-lanceolate, mucronate, 3-nerved, with scabrous margins; heads 6-8- 

 flowered, in clusters, forming a compound fastigiate corymb ; scales of the 

 involucre oval, obtuse, or abruptly somewhat acute, loosely imbricated in 3-4 

 series, the innermost glabrous, nearly the length of the disk ; lobes of the co- 

 rolla about half the length of the tubular portion ; branches of the style elon- 

 gated; the appendages lanceolate, acute. — Chrysothamnuslanceolatus, Nutt.! 

 in trans. Amer. p)hil. soc. (n. ser.) 7. p. 324. 



Rocky Mountains, on the sources of the Platte, and of Lewis River, Nuttall! 

 — " A moderate-sized shrub." Leaves l-lj inch long, 3-4 lines broad. Heads 

 smaller than in the preceding. 



§ 3. Involucre 5-flowered, mostly shorter than the disk; the concave or 

 carinate scales oval or oblong-linear : aj)pendages of the style linear-sub- 

 ulate, longer than the linear flat stigmatic portion. — Chrysothamuus, Nutt. 



(Bigelowia § 2. Spuriae, DC.) 

 VOL. II. — 30 



