242 COMFOSITiE. Aplopappds. 



On Mount Ranier, Oregon ! collected either by Douglas or Mr. Tolmie ; 

 the specimen communicated by Sir Wm. Hooker. — Stem or scape 3-4 inches 

 high, bearing 3 or 4 small leaves below the middle, tomentose-pubescent near 

 the summit. Radical leaves 1-3 inches long, apparently rather fleshy. 

 Heads nearly as large as in A. unitlorus, to which it is manifestly allied ; 

 from which we infer the ray (twice the length of the involucre) to have been 

 yellow, which is uncertain from the specimen. Pappus whitish, barbellate- 

 scabrous. Achenia at first villous-pubesceni, the hairs deciduous. Appen- 

 dages of the style elongated-subulate, much longer than the stigmatic portion. 



§ 3. Rays ivanting. — Aplodiscus, DC. 



* Involucre ohconical, as long as the disk ; the scales regularly vnibricated in 4-5 series, 

 oblong, with narroio scarious margins, and slightly herbaceous and spreading tips : 

 corolla dilated at the siLnimit, the teeth spreading. (Aplodiscus, DC. Isocoma, Nutt.) 



7. A. Menziesii: stem sufFruticose ; the branches elongated, simple, some- 

 what pubescent ; heads in terminal corymbose clusters ; leaves oblanceolate 

 or linear-spatulate, impressed-punctate, somewhat fleshy, glabrous, spinu- 

 lose-serrate towards the apex, often fascicled in the axils; appendages of the 

 style ovate, acute, much shorter than the stigmatic portion; achenia silky. — 

 Pyrrocoma Menziesii, Hooh. Sf Am. hot. Beechey, siipjd. p. 351. Isocoma 

 vernonioides, Nutt. ! in trans. Anier. 2}hil. soc. I. c. p. 320. 



California, Menzics. Common in marshes near the sea, at St. Barbara, 

 Nuttall! April-May.— Plant 1-2 feet high. 



* • Involucre elongated obconiccd ; the ohlong-Unear scales regularly imbricated in nu- 

 Tnerous series on the slender cylindrical rachis, rnth herbaceoxis squarrose tips, the in- 

 Tiermost as long as the disk: corolla not dilated at the summit. 



8. A. squarrosus (Hook. & Arn.): slightly pubescent, somewhat resinous 

 or glutinous; stem shrubby, branched; heads crowded or spicate at the sum- 

 mit of the branches and in the upper axils; leaves crowded, obovate-oval, 

 rigid, 1-nerved, obscurely veined, closely serrate with mucronate spreading 

 teeth, very obtuse, partly clasping ; appendages of the style ovate-lanceolate, 

 as long as the stigmatic portion; achenia nearly glabrous. — Hook. S^' Am. ! 

 lot. Beechey, p. 146 ; DC. prodr. 7. p. 280. Pyrrocoma grindelioides, DC. ! 

 procl.r. 5. p. 350 ; Hook. S^' Am.! I. c. svpjd. p. 351. 



California, Capt. Beechey, Douglas! iyc. Plant with the habit of some 

 species of Baccharis. Leaves of the branches an inch long. Heads two- 

 thirds of an inch in length. Receptacle narrow. 



* * * Involucre heniispherical, as long as the disk ; the scales lanceolate, vmiricated in 

 about 3 series, oppressed : corolki longer than the very unequal pappus, not dilated at 

 the summit, i-5-toothcd. (Eriocarpum, Nutt.) 



9. A. NuttaUii : ciuereous-tomentose, dwarf; stems numerous from a 

 woody base or caudex, leafy, bearing several somewhat corymbose (small) 

 heads ; leaves cuneiform-oblong, sessile, serrate-toothed, the teeth ending in 

 bristles, when old somewhat glabrous; appendages of the style oblong-lan- 

 ceolate ; achenia silky-villous. — Eriocarpum grindelioides, Nutt. ! in trans. 

 Amer. phil. soc. I. c. ]). 321. 



On shelving rocks in the Rocky Mountain range, Oregon, Nuttall! — Plant 

 about 6 inches high, with the habit, pappus, &c. of a genuine Aplopappus. 

 Alveoli of the receptacle strongly toothed. 



