euchera Micrantha.

SMALL-FLOWERED HEUCHERA; _Nat. Ord._ SAXIFRAGACEAE.

From Columbia. Flowers a yellowish-green; leaves nearly round, bluntly
lobed, crenate or round toothed, the teeth horned or pointed; the colour
is inclined to auburn during autumn, but it varies, and for a botanical
description it would be hard to state a particular colour. The gardener,
however, will find in this a most useful plant, where different forms
and tints of foliage are desirable. Into the sub-tropical garden it may
be introduced with good effect. I may add that the leaf stalks are 9in.
to 12in. long, also of a rich brown colour, and the leaves are 3in. to
5in. across.

Cultivation and flowering period, as described under _Heuchera_.

Heuchera Purpurea.

_Nat. Ord._ SAXIFRAGACEAE.

This seems to be a less known or newer variety. If the name has
reference to the colour of the foliage, it is not inappropriate. The
bold leaves are a dark green, shading to a bronze, then a purple, the
whole having a soft downy effect. It is a charming kind.

Cultivation and flowering period, the same as for the _Heuchera_.

Heuchera Ribifolia.

CURRANT-LEAVED HEUCHERA; _Nat. Ord._ SAXIFRAGACEAE.

This is another dwarf kind, producing such leaves as the name denotes.
Of this species the only useful feature for a garden seems to be its
habit of neatly carpeting the ground under deciduous trees. It has also
a remarkably fresh appearance during winter.

Cultivation and flowering period, as for other _Heucheras_.

Heuchera Richardsoni.

RICHARDSON'S HEUCHERA; _Nat. Ord._ SAXIFRAGACEAE.

A taller variety than _H. Drummondi_. The most striking distinctions are
the pale green colour of the young leaves contrasting with the bronzed
appearance of the older ones, and the larger size of its flowers, which,
however, are green.

Cultivation and flowering period, as for other species.

Houstonia Coerulea.

BLUETS; _Nat. Ord._ GENTIANACEAE.

[Illustration: FIG. 52. HOUSTONIA COERULEA.

(Natural size.)]

Hardy and evergreen. This pretty little shining plant never exceeds a
height of 3in. Like most species of this order, both flowers and foliage
have much substance and endure for a long time in perfection, but its
neat form and bright parts most commend it--it almost sparkles in both
leaf and flower. This species, as implied by the specific name, bears a
blue flower, but there is a variety (_H. c. alba_ or _H. albiflo