of the corolla campanulate, 5-toothed), staminate. Scales of the involucre
oblong, obtuse, somewhat in a single series. Receptacle naked. Anthers
scarcely caudate. Style abortive in the flowers of the disk; in those of the
ray 2-cleft, the branches somewhat terete. Achenia of the ray somewhat
cylindrical-oblong, glabrous; in the disk abortive. Pappus of the ray-
flowers in many series, of the disk in a single series, capillary.—A perennial
herb, common throughout Europe and Asia, and sparingly naturalized in the
northern portions of the United States. Rhizoma rather thick, horizontal.
Leaves radical, appearing later than the flowers, cordate, angled or toothed,
petioled. Scape clothed with scaly bracts, tomentose, bearing a single head.
Flowers yellow.—Colt's-foot.
T. Farfara (Linn.)—FI. Dan. t. 595 ; Engl. lot. t. 429 ,• W illd .! spec.
3. p. 1967 ; DC. ! prodr. 5. p . 208; Beck, lot. p. 200.
Wet places and low meadows in cultivated grounds; introduced from
Europe. March—April.—The Colt's-foot, a well known article of the popular
materia medica, although not enumerated by any American writer, except
Prof. Beck, is perfectly naturalized in many parts of the Northern States,
in moist grounds; where it sometimes becomes a troublesome weed.
21. ADENOCAULON. Hook. lot. misc. 1 . p. 19, t. 15, 8p fl. Bor.-Am.
1. p. 308 ; DC. prodr. 5. p . 207.
Heads 5-10-flowered, heterogamous; the flowers all tubular and equal:
those of the ray 5, in a single series, pistillate; of the disk 4—5, staminate.
Corolla 4-5-lobed. Scales of the involucre several, in a single series, reflexed
in fruit. Receptacle naked. Achenia obovate-oblong or clavate,
bearing towards the summit numerous large stipitate glands. Pappus none.
—Perennial (N. American & Chilian) herbs. Stem leafy towards the base,
naked and paniculate above, clothed with a somewhat deciduous tomentose
pubescence, glandular towards the summit. Leaves alternate, pinnately or
palmately veined, membranaceous, petioled, glabrous above, tomentose and
canescent beneath. Heads few, small, loosely paniculate. Flowers apparently
white.
1 . A . licolor (Hook.! 1. c .) : leaves deltoid, mostly cordate, angularly
toothed or sinuate, somewhat decurrent on the petiole__DC. prodr. 5. p. 207.
/?. integrifolium: leaves smaller, deltoid-ovate or slightly cordate, obscurely
angulate-toothed or entire.—A. integrifolium, Nutt. ! in trans. Amer.
phil. soc. (n. ser.) 7. p. 289.
Dense woods, Oregon, from Fort Vancouver, &c. Dr. Scouler ! Nuttall!
to the Rocky Mountains in lat. 52°, Drummond! Near the outlet of Lake
Superior, Dr. Pitcher ! June.—Stem 10-30 inches high, slender. Leaves
2-4 inches long, and usually about the same breadth at the base, densely
tomentose beneath with a close white arachnoid pubescence. Anthers sagittate,
acuminate, sterile and nearly unconnected in the fertile flowers. Style
entire in the sterile flowers, in the fertile with two short obtuse lobes.—The
var. /?. appears to pass insensibly into the ordinary larger form; the toothing
of the leaves is very inconstant.
T r ib e III. ASTEROIDEÆ. Less.
Heads heterogamous or sometimes homogamous, rarely dioecious.
Style (in the perfect flowers) cylindraceous above ; the branches flat
or flattish, mostly linear or lanceolate, above equally pubescent externally
; the conspicuous stigmatic lines terminating where the exterior
pubescence commences, not confluent.—Leaves alternate, or rarely
opposite.
CONSPECTUS OF TH E SUBTRIBES.
Subtribe 1. A sterine®. Heads heterogamous and radiate, or homogamous. Receptacle
seldom chaffy. Anthers not caudate. Leaves alternate.
Div. 1. A stere®. Heads radiate, heterochromous (rays never yellow).
Div. 2. Chrysocome®. Heads radiate, or homogamous, homochromous
(both the ray and disk yellow).
Subtribe 2. S accharide.®. Heads dioecious or heterogamous, but never radiate;
the pistillate flowers tubular, slender or filiform, in several series. Receptacle
not chaffy. Anthers not caudate.
Subtribe 3. T archonanthe®. Heads dioecious or heterogamous, but never radiate
; the pistillate flowers tubular and very slender, mostly in several series.
Anthers caudate.
Subtribe 4. Inule®. Heads heterogamous and radiate, or homogamous and discoid,
never dioecious. Receptacle not chaffy. Anthers caudate. Leaves
alternate.
Subtribe 5. E clypte®. Heads heterogamous, radiate. Receptacle chaffy. Anthers
not caudate. Pappus toothed or awned, or none. Leaves opposite.
Subtribe L A s t e r in e ® , DC.—Heads heterogamous and radiate, or homogamous,
never dioecious. Receptacle seldom chaffy. Anthers not caudate.
Leaves almost always alternate.
Div. 1 . A s t e r e ®, DC.—Heads heterogamous, radiate; the rays of
the cyanic series (viz : white, purple, or blue, &c.); the disk-flowers yellow,
but frequently changing to purple in fading. Receptacle not chaffy, except
in a species of Corethrogyne.
CONSPECTUS OF TH E GENERA.
Sub div. 1. E dastere®.—Pappus of capillary or rarely subulate bristles.
* Rays neutral or sterile. Pappus simple, capillary.
22. G alatella. Appendages of the style triangular or deltoid-spatulate. Pappus
of the ray and disk similar.
23. C orethrogyne. Appendages of the style densely penieillate. Pappus of
the ray nearly or entirely wanting.
* * Rays fertile. Pappus of the ray and disk similar (except in Erigeron § Phalacro-
loma), simple or double; the inner capillary.
24. D ieteria. Pappus simple, very unequal. Rays several or numerous, in a
single series. Involucre obovate, much imbricated. Root mostly biennial.
Leaves usually pinnately toothed or pinnatifid.