On Mount Ranier, Oregon ! eollected 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. uniflorus, 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-pubescent, the hairs deciduous. Appendages
of the style elongated-subulate, much longer than the stigmatic portion.
§ 3. Rays wanting.—Aplodiscus, DC.
* Involucre obconical, as long as the disk; the scales regularly imbricated in 4-5 series,
oblong, with narrow scarious margins, and slightly herbaceous and spreading tips:
corolla dilated at the summit, the teeth spreading. (Aplodiscus, D C. Isocoma, Nutt!)
7. A. Menziesii; stem suffruticose ; the branches elongated, simple, somewhat
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, Hook. Am . hot. Beechey, suppl. p. 351, Isocoma
vernonioides, N u tt.! in trans. Amer. phil. soc. 1. c. p. 320.
California, Menzies. Common in marshes near the sea, at St. Barbara,
Nuttall! April-May.—Plant 1-2 feet high.
* * Involucre elongated obconical; the oblong-linear scales regularly imbricated in numerous
series on the slender cylindrical raclvis, with herbaceous squarrose tips, the innermost
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 summit
of the branches and in the upper axils; leaves crowded, obovate-oval,
rirnd, 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. Sf Arn. !
lot. Beechey, p. 146 , DC. prodr. 7. p. 280. Pyrrocoma grindelioides, DC. !
prodr. 5. p . 350 ; Hook. SfArn.J l. c. suppl. p. 351.
California, Capt. Beechey, Douglas! Sfc. 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 hemispherical, as long as the disk; the scales lanceolate, imbricated in
about 3 series, oppressed: corolla longer than the very unequal pappus, not dilated at
the summit, 4,-5-ioolhed. (Eriocarpum, Nutt!)
9. A. Nuttallii: cinereous-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-lanceolate
; achenia silky-villous.—Eriocarpum grindelioides, Nutt. ! in trans.
Amer. phil. soc. 1. c. p. 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.
48. PYRROCOMA. Hook. Jl. Bor.-Am. 1. p . 306, t. 107.
Sect. Eupyrrocoma § Bracteosse, DC:—Homopappus (partly) & Pyrrocoma, Nutt.
Heads many-flowered; the ray-flowers numerous, pistillate, but sometimes
infertile or inconspicuous; the disk-flowers tubular, perfect. Scales of the
hemispherical or campanulate involucre rigid, somewhat foliaceous, nerveless,
oblong, with more or less squarrose or herbaceous tips. Receptacle flat,
alveolate-toothed. Corolla of the disk cylindrical, slightly dilated upwards,
with short erect teeth. Branches of the style in the disk-flowers subulate-
linear, elongated, the hispid appendages much longer than the stigmatic portion
; those of the ray often unequal or one of them abortive, glabrous.
Achenia linear, elongated, somewhat 3-angled and striate, glabrous, rarely
hairy. Pappus (reddish-brown or fulvous) of copious and uniform slender
rigid bristles, usually longer than the corolla of the disk, expanding.—Perennial
rigid herbs (natives of Oregon), with simple stems; the showy heads
terminal or in the axils of the upper leaves, often sessile. Leaves coriaceous,
alternate, lanceolate or oblong, sessile, 1-nerved, reticulate-veined, obscurely
pellucid-punctate, sharply serrate or entire. Flowers yellow.
§ 1. Heads very large and Iroad, with foliaceous bracts; the rays slender,
concealed in the pappus or exserted (the margins involute in dried specimens),
infertile.—E upyrrocoma.
1. P . carthamoides (Hook.! 1. c .) : stem (and young leaves) pubescent,
terminated by a single bracteate head ; leaves oblong-lanceolate, mucro-
nate-acurninate, sparingly spinulose-serrulate ; the lowest tapering into
slender petioles; bracts similar to the uppermost leaves, as long as the proper
involucre; corolla of the ray and disk shorter than the pappus.—D C .! prodr.
5. p. 350.
Oregon, (in the interior ?) Douglas!—Stem rather stout, a foot or more
high. Head more than an inch in diameter ; the proper scales of the involucre
oblong, imbricated in 3 to 4 series, shorter than the disk.—The close resemblance
of this plant to the following radiate species induced us to examine
it more attentively ; and we find that the head is not truly discoid, as has
been supposed ; but there is an outer series of rays, which are so concealed
in the pappus as readily to escape observation. One of the branches of the
style in these flowers is suppressed or abortive ; the other is stigmatose, but
the ovary is apparently infertile.—It is not improbable that the rays will be
found to be sometimes a little exserted.
2. P. radiata (Nutt.) : very glabrous; leaves shining, reticulated, clasping;
the radical (petioled) and lower cauline obovate-oblong, entire; the
upper ovate-lanceolate or oblong, sparingly spinulose-serrate or entire; heads
usually several and somewhat corymbose; bracts fewer, passing into the
scales of the involucre; rays (about 25) exserted; the corolla of the disk as
long as the pappus.—Nutt.! in trans. Amer. phil. soc. (re. ser.) 7. p. 333.
Plains of Oregon near Walla-wallah, Nuttall !—Stem stout, 12-18 inches
high. Leaves very thick, 3-6 inches long, the lower 2 inches broad. Heads
nearly as large as in Inula Helenium! Involucre much like that of Liatris
scariosa ; but the scales not dilated above, and acutish, imbricated in 5 or 6