Rocky Mountains! to the coast of Oregon! and Nootka, &c. July—
5o i 2orDflheS h’| h- L ?aves an lnfih or more in length; the upper linear.
Heads 25 35-flowered, as large as in the preceding; the scales about 12,
oval-oblong. Pappus of mostly 4 oblong or lanceolate acutish scales, and as
many alternate smaller scales, the latter often denticulate at the apex. The
leaves vary greatly. ^
, 7' B-gracilis (Hook. & Arn.): lanuginous-tomentose throughout; stems
branched from the base, naked above; leaves alternate, attenuate, linear, obtuse,
entire; the lower somewhat spatulate ; heads terminating the long
simple peduncles; rays large; achenia glandular-pubescent— Hook. ^ A m !
bot. Beechey, suppl. p . 353, 1
Interior of Oregon, Snake Fort, Mr. Tolmie /-S tem s slender, 8-10 inches
high. Leaves nearly 2 inches long, about a line wide. Scales of the involucre
yeJ,ow m d™d «f w
t Species unknown to us.
h r t £ ; ? PP0Sitif0li<\ {NT ’ under Trichophyllum): decumbent and much
branched, canescently pubescent; leaves opposite, all palmately 3-cleft; the
segments ligulate, simple, or divaricately subdivided ; peduncle filiform,
dtchotomah scarcely longer than the leaves. N u t t— D C . p r o d r . 5. p .
057. 1 nchophyllum oppositifolium, N u tt, g e n . 2. p . 167. r
Tn^enA.mted 9Srte?nleQhillS^-ffar ^ andari on the Missouri, abundant.
1 S dlf[use’ 6-12 lnches hiSh-cent, the pubescence very short: segments about anL ienacvhe sl opnegti, otlhaitcek, hcahn elsi-
near, somewhat obtuse. Peduncle slender, 1-2 inches long. Involucre ’oblong
cylindrical ; the scales 6- 8, oblong-ovate: rays about the same number,
very short. Pappus minute, of 5-8 partly obtuse and somewhat lacerate
aroma. NuttaU. Y * Plant SeDsibly biUer’ and destitute of
120. ACTINOLEPIS. DC. prodr. 5. p. 655; Hook. ic. pi. t. 325.
Heads several-flowered ; the ray-flowers 3-5, ligulate, pistillate ; those of
the disk tubular, perfect and fertile ! Involucre oblong-campanulate, bracte-
ate at the base, tomentose ; the scales about 5, eblong-obovate, obtuse, con-
nivent after flowering, and involute so as to include the achenia of the ray.
Receptacle small, convex, naked. Rays slightly exserted, oval, mostly
2- toothed, raised on a slender tube. Corolla of the disk with a slender tube
(pubescent with jointed hairs), and a spreading deeply 5-lobed limb.
Branches of the style in the disk-flowers short, rather flat, terminated by a
very obtuse puberulent cone, or almost truncate. Achenia slender, terete
striate, tapering to the base ; those of the ray minutely hairy, crowned with
a (somewhat deciduous ?) pappus of 10-15 narrow and almost aristiform
acute unequal scales, slightly united at the base ; those of the disk similar
but glabrous and destitute of pappus—A low (2-6 inches) and slender diffusely
branched annual herb, clothed with loose somewhat deciduous wool-
the stems corymbosely branched. Leaves alternate '(opposite, DC.), very
small (2-3 lines long), sessile, cuneate-obovate, deeply and very obtusely
3- toothed at the apex. Heads small, solitary and sessile in the forks of the
stem, and somewhat glomerate at the extremity of the branches ; the bracts
(1-2) similar to the leaves. Flowers of the disk and ray yellow. Anthers
nearly white. Achenia black.
A . multicaulis (D C .! 1. c.)—Hook. SpArn.! bot. Beechey, suppl. p . 353.
California, Douglas!—Our description differs considerably from that of
De Candolle, who perhaps examined an imperfect specimen. He describes
the disk-flowers as probably sterile with the style undivided, and does not
notice the involution of the involucral scales so as nearly to enclose the ray-
achenia, as in the Madiese; but we find the disk-flowers (perhaps every
one) fertile.
121. LASTHENIA. Cass.; DC. in Lindl. bot. reg. t. 1780, 8f prodr. 1. c.
Heads many-flowered ; the ray-flowers 5-15, pistillate, ligulate, obliquely
truncate and included, or oblong and exserted ; those of the disk tubular,
perfect. Involucre as long as the disk, campanulate, composed of 5-15 scales
united nearly to the summit; the teeth triangular, acute, ciliate. Receptacle
conical, papillose. Corolla of the disk with a slender glandular-pubescent
tube, and a campanulate 5-toothed limb. Branches of the style in the disk-
flowers terminated by a short cone. Achenia linear-oblong, compressed,
appressed-pubescent or glabrous. Pappus of about 10 unequal acute lace-
rate-toothed chaffy scales, or none!—Annual diffusely branched (Chilian and
Californian) herbs, growing in wet places ; with opposite linear or lanceolate
mostly entire leaves, somewhat connate at the base. Heads solitary, terminating
the branches ; the elongated peduncles more or.less dilated and obconi-
cal at the base of the involucre. Flowers yellow: the anthers yellowish.
§ 1. Pappus of 9 or 10 (rarely 5?) unequal chaffy scales: rays very short, included.—
L asth enia, Cass. (Rancagua, Pcepp. Endl.)
1. L. glaberrima (DC.): involucre about 15-toothed; pappus as long as
the disk-corolla, and nearly equalling the obliquely truncate included rays ;
the scales lanceolate or oblong, the larger ones cuspidate; plant glabrous
throughout.—DC. ! prodr. 5. p. 664 ; Hook. Arn. bot. Beechey, l. c.
L. Californica, DC. ined., not of Lindl.
California, Douglas!—Plant slender, 6-12 inches high. Leaves 2-3
inches long, 1-2 lines wide. Corolla much shorter than the achenia.
(Scales of the pappus 5, according to De Candolle.)
§ 2. Pappus none: rays exserted, conspicuous.—H ologtmne, Bartl. (Lasthenia,
Lindl., Endl.)
2. L. glabrata (Lindl.): involucre 10—15-toothed; peduncles and young
leaves slightly and minutely pubescent.—Lindl. ! bot. reg. t. 1780 ;
DC.! 1. c .; Nutt.! in trans. Amer. phil. soc. 1. c. L. Californica, Lindl. bot.
reg. 1. c. (note) 1. 1823 ; but not the plant to which this name was originally
applied by De Candolle. Hologymne glabrata, Bartl. ind. sem. 'Gcett.
1837 $f 1839, If in Linniea, 12. suppl. p. 8 1 ; Hook. 8f Arn. bot. Beechey,
v o l . i i .— 48