TUSSILAGO PETASITES (Fcem.). BUTTERBUR (Fern.).
TUSSILAGO Pelantes ( ja m ) ; thyrso ovato-oblougo elongate, fôliis cordatis inæqualiter dentatis, lobis
approxmatis, subtus pubescentibus.
TUSSILAGO Petasites foem. thyrso elongato, flosculis fere omnino foemineis.
TUSSILAGO Petasites î foem. W illi. Sp. PI. vol. S. p .1971. D e ca n i.F l F ,-c i. S .m l i . p . 159.
y,y. Gall. Syn. p. 282. P a s . Syn. PI. ml. 2. p . 455. A it. Hort. K m . c i. 2. ml. 5.
». 36. Hook. Fl. Scot. P. I. p. 242.
TUSSILAGO hybrida. Linn. Sp. PI.H S H S a i s . A ag i.p . B | W S M BÈM SK Ê IÈ Ê Ê K
Bot. J r r . ci. 4. ml. 3. p. 70S. Hoffm. Germ. ei. 2. ml. 1. P . I I. p . 141. S m m Jti.
B r it. ». 879- Engl. Bot. t. 430.
PETASITES floribus spicatis pendulis, petiolis multifloris, calycibus æqualibus, flosculis paucissimis
androgynis. ■ Hall. Uelv. n. 140.
PETASITES major, floribus pediculis longis insidentibus. Dill, in R a n Syn. p. 179-
Class a n d Ord e r . SYNGENE S IA POLYGAMIA SUPERFLUA.
[N atural Order. C OM PO S IT E , Div. I I I . CORYMBIFERIE, Juss., H o o k ty ^ ^
GEN. Char. Im o lm rum simplex, asquale, submembranaceum, ventricosum. Receptaculum nudum. Pappus
simplex.
Ge n . Char. Involucre simple, equal, submembranaceous, swelling. Receptacle naked. simple.
Radix, Folia, Scapus, T hyrsus, Bracte2e et In-
volucrum omnino ut in T. Petasite masc, sed
' thyrso magis elongato.
Flosculi fere omnino foeminei, pauci masculini: Fos-
minei graciles, tubulosi, purpureo rosei, superne
vix incrassati, limbo quinquefido, erecto-patente.
Flosculi masculini perpauci, foemineis paulo brevi-
ores atquelatiores, sursum incrassati, limbo quin- |
quefido, patente.
Stamina supra medium coroll® inserta. ■
Filamenta alba, brevia: Anther® oblong®, apice ap-
pendiculat®, purpure®.
Pollen albidum.
Germen ovatum, l®ve, abortivum.
Stylus filiformis, albus, corolla paulo longior: Stigma
insigniterintressatum,minute tuberculatum,apice
acutum, bifidum.
ANTHERiE null®.
Germen ovatum, striatum.
Stylus corolla paulo longior, filiformis, albus.
Stigma vix incrassatum, bifidum.
P ericarpium (Achenium) ovatum, striatum, fuscum,
pappo sessili, albo, simplice, scabro terminatum.
Root, Leaves, Flower-stalk, T hyrsus, Bracte
as and Involucre precisely similar to Those
of the male state of T. Petasites, except in the
thyrsus being more elongated.
Flowers nearly all female, very few male: Female florets
slender, tubular, of a purplish rose-colour,
slightly incrassated above, the limb quinquefid,
erecto-patent.
Male florets very few, rather shorter and broader
than the female ones, thickened upwards, limb
quinquefid, patent.
Stamens inserted above the middle of the corolla.
Filaments white,' short: Anthers oblong, furnished
with an appendage at the extremity, purplish.
Pollen white.
Germen ovate, smooth, abortive.
Style filiform, white, a little longer than the corolla:
Stigma remarkably incrassated, minutely tuber-
culated, acute and bifid at the extremity.
An th ers none.
Germen ovate, striated. ...
Style somewhat longer than the corolla, filiform, white.
Stigma slightly incrassated, bifid. _
Pericarp (Achenium) ovate, striated, brown, terminated
by a white, sessile, simple, scabrous pappus.
. Fig. 1. Pistilliferous flower. Fig. 2. The same cut open to sum“ ih e ^ d b o p em
theriferous flower! Pig. 4. The same cut open. Fig. 5. Single:anthe,J i g . 6. ih e same wim m F
Fi<r. 7. Pollen. Fig. 8. Filament of the pappus:— all more or less magnified.
I t is surprising that so many botanists should have published this plant without suggesting
« M M is, the fertile s « e of TussUago Petasites.
and the observations published by Curtis on the sterile state <jf ’ V .. °
equally applicable to Ibis'. Ray says of it “ extnnsecus ad bubones et ulcere maligna.