pappus 5-7, broadly ovate, tipped with slender awns.—Nutt.! gen. 2. p.
173,■ dj- in trans. Amer. phil. soc. 1. c. Actinea acaulis, Spreng. syst. 3. p.
574; Torr.! in arm. lyc. New YorTc, 2. p. 213. Galardia acaulis, Pursh!
fl. 2. p. 743. Cephalophora (Actinella) acaulis, DC. prodr. 5. p. 663.
Dry chalky soil, along the upper part of the Missouri & Platte Rivers,
Bradbury, Nuttall! Dr. James!—Plant growing in very dense tufts. Leaves
1-2 inches long, the silky pubescence dense and appressed. Scapes 3-6
inches long. Heads three-fourths of an inch in diameter, including the 10-12
cuneate-oblong yellow rays. Proper tube of the disk-corolla almost none.
Receptacle hemispherical. Achenia very villous. Pappus nearly equalling
the corolla of the disk.
3. A . Torreyana (Nutt.): densely csespitose ; scapes, involucre, and axils
of the leaves very tomentose; leaves clustered, narrowly linear, obtuse,
sparsely hairy, strongly punctate with blackish dots, usually as long as the
scape; scales of the involucre oblong-ovate, with scarious margins, in about
2 series ; scales of the pappus 5-7, ovate, nearly awnless.—Nutt. ! in trans.
Amer. phil. soc. 1. c., excl. syn.
Shelving rocks on the lofty hills or mountains of the Upper Platte called
the “ Three Butes,” Nuttall! June.—Plant 2-3 inches high. Leaves a
line wide, rigid. Heads rather smaller than in the preceding. Rays rather
large, 8-10. Receptacle conical.
4. A. lanata (Nutt.! 1. c .) : densely csespitose, very woolly throughout;
leaves clustered, linear-oblanceolate, the primary oblong-spatulate and somewhat
glabrous when old, nearly impunctate ; scales of the involucre oblong-.,
lanceolaterin about 3 series ; the inner with scarious margins ; scales of the
pappus 5-6, ovate, tipped with short awns.—Actinea integrifolia, Torr. in
ann. lyc. New York, l. c. ? not of Kunth !
With the preceding, which it closely resembles, Nuttall! (Rocky Mountains
in about lat. 41°-, Dr. James!) June.—The specimen of A. integrifolia
? Torr. 1. c. is so imperfect that we cannot very confidently refer it to
the present species ; but it certainly is not the same with the foregoing.
5. A. glabra (Nutt.! 1. c .): densely csespitose ; leaves narrowly linear or
linear-spatulate, nearly glabrous when old, impressed punctate ; the dilated
scarious bases imbricated on the slender branches of the caudex; scape
naked or with a single leaf; scales of the involucre ovate, obtuse, woolly, in
about 2 series ; scales of the pappus 5, oblong-ovate, lacerate-toothed, nearly
awnless, scarcely more than half the length of the corolla.
Near the Shawnee villages on the Missouri, Nuttall! On the Platte?
Dr. James!—Plant 3-5 inches high. Heads smaller than in A. acaulis.
Pappus shorter than in any of the preceding species.
6. A . scaposa (Nutt.! 1. c .): villous; stems leafless, strict, simple, bearing
a single head; leaves radical, linear-lanceolate, attenuate at the base,
entire, or some of them pinriatifid with a few acute lobes; exterior scales of
the involucre obtuse, appressed, shorter than the disk ; scales of the pappus
oval, abruptly awned, a little shorter than the corolla. DC.—Cephalophora
(Actinella) scaposa, DC. prodr. 5. p. 663.
/?. linearis (Nutt.! I c .) : cinereous-pubescent, scarcely villous; scapes
several from a slender branching caudex, on which the narrowly linear entire
and punctate leaves are closely imbricated ; scales of the involucre linear
oblong, in about 2 series, silky-villous; achenia sparsely villous.
Texas, in the eastern districts, Berlandier. (3. Texas, Dr. Riddell!—
The scapes, in the plant described by De Candolle, are 8-12 inches long;
the leaves 2-3 inches in length and 2-3 lines in breadth, acute; the rays
4-nerved and 3-toothed. Our plant agrees with this description, except that
the leaves are narrower, less hairy, &c.; and the involucre is nearly as long
as the disk. The heads are rather larger than in the following species ; the
rays 12 or more, bright yellow, elliptical-oblong. The membranaceous
scales of the pappus, 5 in number, are roundish-oval, obscurely 1-nerved,
and very abruptly awned, the awns short; in the ray similar but awnless.
* * * Annual: stems branching, diffuse: leaves entire.
7. A. linearifolia: somewhat pubescent with slender spreading hairs; peduncles
slender, terminating the spreading branches; leaves narrowly linear,
the lowermost oblanceolate, attenuate at base; scales of the involucre oblong,
obtuse, pubescent, in 1-2 series; scales of the pappus 5-6, ovate, entire,
tipped with slender awns.—Hymenoxys ? linearifolia, Hook. ic. pi. t. 146;
DC. prodr. 7. p. 243.
Texas, Drummond ! Western Louisiana or Arkansas, Dr. Leavenworth!
—Plant slender, 6-12 inches high. Heads one-half to two-thirds of an inch
in diameter, including the 8-9 rather large obovate-oblong rays, which are
apparently pale yellow. Receptacle conical. Achenia villous. The heads
exhale the odor of Chamomile when bruised, as in Hymenoxys. Although
an annual, it is doubtless a congener of the preceding species.
126. AMBLYOLEPIS. DC. prodr. 5. p. 667.
Heads many-flowered, radiate; the ray-flowers ligulate, pistillate, in a
single series, 3-cleft at the apex ; those of the disk tubular, perfect. Scales
of the involucre in two series; the exterior 6 or 7, ovate,- acute, foliaceous, appressed,
as long as the disk ; the inner roundish-obovate, very obtuse, hyaline,
nerveless. Receptacle flatfish, alveolate. Corolla of the disk with a short
tube and an inflated throat, 5-lobed ; the lobes lanceolate, callous-apiculate.
Anthers with long acute appendages. Branches of the style not appendicu-
late. Achenia turbinate, very villous with appressed,hairs. Pappus of 5
very obtuse nerveless scales in a single series, as long as the tube of the corolla.—
An annual erect and simple herb, sparingly hairy along the stem, the
margins of the leaves, and the scales of the involucre. Leaves alternate,
partly clasping, not decurrent, oval-lanceolate, nearly entire. Heads terminal,
solitary, of the size and aspect of Pyrethrum Myconis. Flowers
yellow. DC.
A . setigera (DC. 1. c.)
Texas, between Bexar and Austin, Berlandier.—A' foot high. Leaves
few; the lower obtuse, the upper acuminate, DC.-—We have seen this plant
only in the herbarium of De Candolle.
127. HELENIUM. L in n .; Lam. ill. t. 688; DC. prodr. 5. p . 665.
Heads many-flowered, radiate; the ray-flowers in a single series; pistillate,
ligulate, cuneiform, 3-5-cleft at the summit, nearly or quite destitute of a
tube. Scales of the involucre in 2 series; the exterior linear or subulate,
foliaceous, spreading or reflexed ; the interior fewer and much shorter, chafly.
Receptacle convex, globose, or oblong, naked. Corolla-of the disk with an
extremely short proper tube, and a cylindraceous inflated 4-5-toothed throat;