HIERACIUM HALLEM. H ALLEM AN HAWKWEEDHIERACIUM
Halteri; caule uni-trifloro uni-bifolio, foliis radicalibus ovato-oblongis acutis pilosis
sinuato-dentatis, basi in petiolum valde pilosum attenuate, cauhnis sessilibus, mvolucro
piloso, pilis plurimis nigro-glandulosis.
«. caule unifloro. Hieracium Halleri. | Fill. Dauph vol. 3 p. 104.” DeCatidolleFl. F r vol. 4.
p. 19. FI. Gall. Syn. p. 258. Hook. FI. Scot, {excl. Syn. H. pumili et H. villosi; P . I.
p. 229. Sturm, Deutsch. FI. cum Ic.
HIERACIUM hybrid™. “ Vill. Dauph. ml. 3. p. 26. Bell. Act. Taur. m l. 6. p. 242.
ß caule subbifloro. Hieracium Halleri. Sprengel. Syst. Veg. ml. 3. p. 641.
Class a n d Or d e r . SYNGENESIA POLYGAMIA-AJQUALIS.
[N a tu r a l O r d e r . COMPOSITE, Decani., Hook.— CICHORACEjE, Juss.]
G e n . Ch a r . Inmlucrum imbricatum, polyphyllum, laciniisanguslis. Rcceptaculum nudum. Pappus sess\\\s.— Spr.
G e n . Ch a r . Involucre imbricated, o f many leaves, the leaflets narrow. Receptacle naked. Pn/jpiw.sessile. Spr.
Ra d ix subhorizontalis, oblonga, lignosa, hie illic fibrosa.
Ca d l is erectus, spilhamseus fere ad pedalem, teres, sub-
striatus, pilosus, simplex vel subramosus, su-
perne nigro-glandulosus, subbifolius.
Folia : radicalia pauca, tres ad quinque uncias longa,
patentia, oblonga vel ovato-oblonga, acuta, pilo-
sa, margine sinuato-dentata, basi in petiolum ple-
rumque brevem, longe densissimeque albo-pilo-
sum, glaueeScenti-viridia, attenuata: caulina, in-
ferum radicalibus subsimile, superiora lanceolata,
iritegerrima, nunc bracteiformia.'
F lores in u solitarii, in (3 duo vel tres ex eodem caule,
magni, sulphurei.
I nvolüCrum e squamis subulatis, erectis, inferioribus
imbricatis, pilosis, pilis vel nudis basi nigris, api-
cibus albis, vel apice glandula ovali, nigra termi-
natis.
F losculi ligulati, exteriores löngiores, patentes, in-
teriores breviores e recti; ornnes apice quinque-
■ dentati.
St am in a quinque, arete antheris cohserentia.
G e rm e n oblongum: Stylus extra antheras protrusus.
Stigma bifidum, segmentis linearibus, recurvis.
Ac h e n ia oblonga, striata, pappo subteque longo coro-
nata.
Recepta culum florum planiusculum, punctatum.
Root subhorizontal, oblong, woody, here and there
fibrous.
St em erect, a span to a foot high, rounded, substriated,
hairy, simple, or somewhat branched, above
with many black glands, bearing about two
leaves. 4
L eaves : radical ones few, three to five inches long,
patent, oblong or ovato-oblong, acute, hairy,
with the margin sinuato-dentate, at the base attenuated
into a generally short petiole} clothed
with long dense white hairs o f a glaucous green :
those o f the stem having the lowest one nearly
resembling the radical ones, the superior lanceolate,
entire, sometimes bracteiform.
Flowers in a solitary, in |3 two or three from the same
stem, large, sulphur-coloured.
Involucre composed o f subulate, erect scales, the
lower ones imbricated, hairy, the hairs either
naked with the base black and the.apices white,
or having at the apex an oval black gland.
Florets ligulate, the exterior ones longer, patent, the
interior shorter, e re ct; all o f them five-toothed
, a t the apex.
Stam en s five, closely cohering at the anthers.
Ge rm e n oblong': Style protruded beyond the anthers.
Stigma bifid, having the segments linear, recurved.
Ac i ie n ia oblong, striated, crowned with a pappus about
equal to it in length.
Recepta cle o f the flowers nearly plane, dotted.
Figs. 1.2. and 3. Florets from different parts of the compound flowers. Fig. 4. Stigma. Fig. 5. Involucre with
perfect fruit. Fig. 6. Hairs and glands from the involucre. Fig. 7. Involucre cut open to show the receptacle.
Fig. 8. Achenium.
Did the present publication meet with that encouragement and patronage which its conductors have so zealously
endeavoured to merit, I should gladly have undertaken, by means of figures of the natural size (which this work is
well capable of admitting), an illustration of the genus Hieracium, than which scarcely any require a more thorough
reformation. The individual now figured is a striking proof of the truth of this assertion; for it is a plant that has
been either entirely overlooked by British botanists, or confounded with other species. I had myself believed the
single-flowered variety to have belonged to the H. villosum of Smith Engl. Bot. t. 2379; and as such I have described
it in the Flora Scotica: but Sir James Smith has corrected me on that point; and I now offer it as a
species undescribed by any other British botanist, and as, certainly, the H. Halleri of Villars and of Sturm, the
latter of whom has given a very characteristic figure in his little Deutschland Flora.
This, however, like all the other species of the genus, is liable to much variety in the size of the plant, ^ especially
in the breadth and toothing of the leaves. From villosum it may be known by its less leafy stem, and the
more compact scales of the involucre, and their being far less woolly. Our single-flowered variety may be known
from H. alpinum (which has the appearance of H. villosum in all but the leafless stems) by the same characters
and the presence of a few leaves: and lastly, the more common state of the plant which is here figured, requires
to be distinguished from H. murorum, than which it is a softer and more villose plant, especially about the base
or petioles of the leaves: these leaves are narrower, tapering gradually into the footstalk, with the toothing not so
much confined to the base of the leaf, and by the larger and paler flowers. I am sometimes of opinion that if .
Lawsoni may eventually come to be united with i t ; and if all the three (for I can find no limits to any of the characters)
were to be considered as varieties of one and the same species, it might serve to simplify and to render
more correct, too, our knowledge of this most difficult genus.
I dare scarcely venture to compare with ours, many of the foreign species: but certainly the H. saxatile of
Jacquin is closely allied to this, and really seems almost to unite the characters of H. murorum and Halleri in
itself.