quest: others again should be sown
early in the spring, and the sowings repeated every month; they grow
readily in almost any soil or situation, and by this means may be had to
flower most of the year through.

If sown in pots, care must be taken to water them frequently.

[61]

~Iris ochroleuca. Tall Iris.~

_Class and Order._

~Triandria Monogynia.~

_Generic Character._

_Corolla_ 6-petala, inaequalis, petalis alternis geniculato-patentibus.
_Stigmata_ petaliformia, cucullato-bilabiata. _Thunb. Diss. de Iride._

_Specific Character and Synonyms._

IRIS _ochroleuca_ imberbis foliis ensiformibus, scapo subtereti
germinibus hexagonis. _Lin. Syst. Vegetab. p. 90._

[Illustration: 61]

Of the several species of Iris cultivated in our gardens, this excels in
point of height; we have taken our English name therefore from this
character, and not from the term _ochroleuca_, which, if translated,
would be too expressive of the colour of the blossoms of the _Iris
Pseudacorus_, with which the _ochroleuca_ has some affinity in point of
size as well as colour.

Notwithstanding Mr. MILLER's description of his _orientalis_
accords very badly with that of LINNAEUS's _ochroleuca_, they
have been generally considered in this country as one and the same
plant, distinguished by the name of POCOCKE's Iris, Dr.
POCOCKE being the person who, according to MILLER, in
his time first introduced it from _Carniola_ (by inadvertence spelt
_Carolina_, in the 6th 4to edition of the Dictionary). There are
grounds, however, for suspecting some error in the habitat of this
plant, for had it grown spontaneously in Carniola, it is not probable
that SCOPOLI would have omitted it in his _Flora Carniolica_.

Leaving its place of growth to be more accurately ascertained hereafter,
we shall observe, that it appears perfectly naturalized to this country,
growing luxuriantly in a moist rich soil, and increasing, like most of
the genus, very fast by its roots. It flowers later than most of the
others.

[62]

~Centaurea glastifolia. Woad-Leaved Centaurea.~

_Class and Order._

~SyngenesiA Polygamia Superflua.~

_Generic Character._

_Receptaculum_ setosum. _Pappus_ simplex. _Corollae_ radii
infundibuliformes, longiores, irregulares.

_Specific Character and Synonyms._

CENTAUREA _glastifolia_ calycibus scariosis, foliis indivisis
integerrimis decurrentibus. _Lin. Syst. Veg. p. 787._ _Gmelin Sib. 2.
p. 83._

CENTAUR