ated; in our gardens with a shrubby
stalk, its leaves however are deciduous, so that in the winter it loses
its verdure, it flowers in July and August, and is readily increased by
cuttings.

As most of this tribe grow readily, and many of them naturally on rocks
and walls, they may be in general regarded as proper rock plants, some
of them however are apt by the quickness of their growth to extend over
and destroy plants of more value; this fault, if such it may be deemed,
is not imputable to the _populifolius_.

Some not knowing its native place of growth, keep it in the
green-house.

[Illustration]

[212]

TANACETUM FLABELLIFORME. FAN-LEAVED TANSY.

_Class and Order._

SYNGENESIA POLYGAMIA SUPERFLUA.

_Generic Character._

_Recept._ nudum. _Pappus_ submarginatus. _Cal._ imbricatus,
hemisphaericus. _Cor._ radii obsoletae, trifidae. _Linn. (interdum
nullae omnesque flosculi hermaphroditi.) Murr._

_Specific Character and Synonyms._

TANACETUM _flabelliforme_ corymbis simplicibus, foliis deltoidibus
apice serratis. _L'Herit. Sert. Angl. t. 27._ _Ait. Hort. Kew. V.
3. p. 169._

There is a neatness in the appearance of this plant, which joined to the
singular form of its foliage, varying also from the general hue,
entitles it to a place in the green-house.

Mr. MASSON discovered it at the Cape, and introduced it here in 1774.
_Ait. Kew._

It flowers from May to August, grows freely, and is usually propagated
by cuttings.

[Illustration]

[Illustration]

[213]

POLYGONUM ORIENTALE. TALL PERSICARIA.

_Class and Order._

OCTANDRIA TRIGYNIA.

_Generic Character._

_Cal._ 0. _Cor._ 5-partita, calycina. _Sem._ 1. angulatum.

_Specific Character and Synonyms._

POLYGONUM _orientale_ floribus heptandris digynis, foliis ovatis,
caule erecto, stipulis hirtis hypocrateriformibus. _Linn. Syst.
Vegetab. ed. 14. Murr. p. 377._ _Ait. Hort. Kew. V. 2. p. 32._

PERSICARIA _orientalis_ nicotianae folio calyce florum purpureo.
_Tournef. cor. 38._ Schovanna-modelamuccu. _Rheed. Mal. 12. p. 147.
t. 76._

Of the genus Polygonum, the present well-known native of the East, as
well as of India, is the principal one cultivated in our gardens for
ornament, and is distinguished not less for its superior stature than
the brilliancy of its flowers; it will frequently grow to the height of
eight or ten feet, and become a formidable riv