14. H. umbellatum; caule erecto simplici valde folioso, foliis lineari-lanceolatis glabri-
nsculis dentatis integerrimisque, floribus subumbellatis, pedunculis pubescentibus, involucris
glabris.—Linn. Sp. PI. p. 1131. Engl. Bot. t. 1771. Rich, in Frankl. ls£. Journ. ed, 2.
App. p . 29.
Hab. From Lake Huron, Dr. Todd, to Fort Franklin, on the Mackenzie River, in lat. 66° north
abundant. Dr. Richardson. Drummond.
11. TROXIMON. Nuttall, an Gcert.v
Involucrum duplex: ext. e foliolis laxe imbricatis ovato-lanceolatis; int. efoliolis 10-12
aequalibus uniformibus, infra medium coadunatis. Receptaculum planum, nudum. Achenia
oblonga, compressa, in rostrum attenuate. Pappus pilosus seu scaber, pluriserialis.—Habitus
Scorzonerse sed folia omnino radicalia.
1. T. glaucum; foliis lineari-ensiformibus acutis acuminatisve integefrimis dentatisque
glaucis, flore maximo flavo, corollae fauce valde piloso.—Nutt, in Frazer’s Cat. 1813.
Pursh, FI. Am. v. 2. p . 505. Rich, in Frankl. Is* Journ. ed. 2. App. p. 29.—a. involucro
lanato.—/3. involucro glabro.
Hab. From the Saskatchewan to the Prairies of the Rocky Mountains, and to the shores of the Arctic
Sea. Dr. Richardson. Drummond.—I suspect the T. cuspidatum of Pursh, (the marginatum of Nuttall,)
is merely a variety of T. glaucum.
2. T. aurantiacum; foliis oblongo-lanceolatis obtusis in petiolum longe attenuates' in-
tegerrimis sinuato-dentatisque, flore aurantiaco, corollas fauce vix piloso. (T ab. CIV.)
Radix fusiformis, perennis. Folia plurima, omnino radicalia, erecta, glabra vel sublanata, membranacea
oblongo-lanceolata, obtusa, in petiolum longum plerumque purpurascentem attenuate. Scopus spithamseus
ad pedalem, erectus, teres, glaber, superne solummodo puhescens. Flos terminalis, “ aurantiacus ” (Drummond),
siccitate fere purpureus, erectus. Involucrum basi lanosum, duplex: int. e squamis 10-12 erectis
lineari-oblongis, aequalibus, obtusis, e basi ad medium coadunatis; ext. e foliolis vel squamis 5-6, lato-
lanceolatis, laxe imbricatis, erectis. Receptaculum nudum. Corolla numerosse, ligulatae, calycis foliola
excedentes, apice 5-dentatse: tubus glabriusculus, ad faucem vix pilosus. Achenium oblongum, compressum,
leviter striatum, in rostrum attenuatum. Pappus e pilis numerosis, aequalibus, alhissimi^ sub iente scabris.
Tab. CIV. Troximon aurantiacum. Fig. 1, Floret; fig. 2, Involucre; fig.'8, Inner involucre; fig. 4,
Achenium and pappus; fig. 5, Section of the achenium:—more or less magnified.
Hab. Alpine Prairies of the Rocky Mountains. Drummond.—Whether this Genus be the same as
Troximon of Gaertner, I am unable to say, having no means of determining. It is, I think, identical with
Nuttall’s Troximon; but that author describes the pappus as plumose, which is not the case in my plants, it is
only very minutely scabrous. The beak of the achenium, in either species, is not evident till the fruit is ripe.
12. HYMENONEMA. Cass.
Involucrum cylindraceum, foliolis imbricatis, appressis, ovalibus, acutis, coriaceis, mar-
ginibus mem'branaceis. Receptaculum nudum. Achenium cylindraceum. Pappus e pilis
paucis scabris aequalibus, basi membranaceo-dilatatis.
1. H. ? glaucum; foliis lineari-acuminatis canaliculatis glaucis.
Hab. About Fort Vancouver on the Columbia. N. Garry, Esq.—Of this there is only a single
specimen, and it appears to be unbranched.
2. H. ? laciniatum; caule ramoso, foliis profunde pinnatifido-Iaciniatis, laciniis angusto-
linearibus subfiliformibus.
Hab. Dry plains of the Columbia, from the Rocky Mountains to the ocean. Douglas.—This and the
preceding plant evidently belong to one and the same genus, and have entirely the habit of Scorzonera ; but
in both, the hairs of the pappus are few in number (about 10), rather harsh and rigid, of a brownish or
tawny hue, singularly dilated at the very base, with the upper part very minutely scabrous. Hence it will
be seen to accord in a very important particular with Hymenonema of Cassini, (a genus supposed to be
peculiar to the eastern parts of the Mediterranean region :) but that author describes the hairs of the pappus
as bearded (barbés) above, and Lessing calls it feathery. Both our plants appear to be annual.
13. KRIGIA.. Willd.
Involucrum polyphyllum, simplex. Receptaculum nudum. Achenium turbinatum.
Pappus biserialis ; serie ext. coroniformi, e squamis 5-8 membranaceis brevibus ; int. e setis
paucis (5-24), scabris.
1. K. Virginica; glauca, foliis primariis rotundatis integris reliquis lyratis glabris, scapo
unifloro glabro demum foliis longiore, calyce. glabro. Nutt.—Willd. Sp. PI. p. 1618.
Pursh, FI. Am. v. 2. p. 504. Bigel. FI. Bost. ed. 2. p . 289.—Hyoseris Virginica. Linn. Sp.
PI. p. 1138. Mich. Am. v. 2. p . 88.
Hab. Canada. Michaux. Pursh.
Trib. II. C y n a r eæ. Lessing.*
Subtrib. I. Ce n t a u r ieæ . Less.
14. CENTAUREA. Linn.
Involucrum imbricatum. Receptaculum setosum. Pappus simplex aut nullus. Cor.
radii sell floris neutri, si adest, 5-partita.
1. C. nigra; involucri squamis ovatis pectinato-fimbriatis patulis, foliis radicalibus
angulato-lyratis, caulinis oblongis, radio nullo.—Linn. Sp. PI. p. 1288. Engl. Bot. t. 278.
Hab. Newfoundland. Miss Brenton.—Introduced.
Subtrib. II. Ca r d u in eæ . Less.
15. ARCTIUM. Linn.
Involucrum globosum, foliolis squarrosis lanatis. Receptaculum paleaceum. Pappus
simplex, multiserialis, brevis, pilis singulis valde caducis.—Herbæ dichotomoe, ïo\ï\s petiolatis
ovatis sublus pallidioribus.
1. A. Lappa. Linn. Sp. PI. p. 1149. Engl. Bot. t. 38. (and t. 2478, A. JBardana.)
Hab. Canada. Mrs. Percival. Mrs. Sheppard. Lake Huron. Dr. Todd.
16. CARDUUS. Linn.
Involucrum tumidum, imbricatum, squamis spinosis. Receptaculum setosum. Pappus
* Whilst this portion of the Compositee is in the press, I have the great satisfaction of receiving the valuable
“ Synopsis Generum Compositarum earumque Dispositionis novce Tentamen” Sfc. of C. F. L essing; and
have no hesitation in adopting, as far as possible, the arrangement of so able an observer, and one who has studied
this difficult tribe of plants with the greatest ardour, and under very favourable circumstances. I have only to
regret, that I could not derive the advantage such a work is capable of affording for the whole of the Order.