in spring. H. Multijugum bears rich purple flowers. Height, 6
in. to 3 ft.

Heleniums.--The Pumilum is a very pretty hardy perennial that may be
grown in any soil, and increased by dividing the roots. It produces
its golden flowers in August. Height, 1-1/2 ft. H. Autumnale is also
easy to grow, but flowers a month later than the Pumilum, and attains
a height of 3 ft. H. Bigelowi is the best of the late autumn-flowering
species, producing an abundance of rich yellow flowers with purple
discs. Flowers in August. Height, 3-1/2 ft.

Helianthemum Alpinum (_Rock Roses_).--These hardy perennials are best
grown in sandy loam and peat, and may be increased by cuttings placed
under glass in a sheltered situation. Bloom in June or July. Height, 1
ft.

Helianthus (_Sunflowers_).--The tall variety is a very stately plant,
suitable for the background or a corner of the border. Well-grown
flowers have measured 16 in. in diameter. The miniature kinds make
fine vase ornaments. They grow in any garden soil, and are easily
increased by seed raised on a hotbed in spring and afterwards
transplanted. The perennials may be propagated by division of the
root. They produce their flowers in August. Height, 3 ft. to 6 ft.

Helichrysum.--Fine everlasting hardy annuals, that grow best in a
mixture of three parts peat and one part sandy loam. May be readily
raised from seed sown in a cold frame in March, or cuttings taken off
at a joint will strike in peat and sand. Bloom during July and August.
For winter decoration the flowers should be gathered in a young state,
as they continue to develop after being gathered. Height, 1 ft. to 6
ft, but most of them are 2 ft. high.

Heliophila.--Pretty little hardy annuals, thriving best in sandy loam
and peat. Sow the seed early in spring in pots placed in a gentle
hotbed, and plant out in May. They flower in June. Height, 9 in.

Heliopsis.--This hardy perennial is useful for cutting purposes, the
flowers being borne on long stalks, and lasting for two or three weeks
in water. It is not particular as to soil, and may be increased by
dividing the roots. Height, 5 ft.

Heliotrope.--Commonly called Cherry Pie. Sow the seed early in spring
in light, rich soil in a little heat, and plant out in May. The best
plants, however, are obtained from cuttings taken off when young,
in the same way as Verbenas and bedding Calceolarias. They are very
sensitive to frost. Flower in June. Height, 1 ft.

Helipterium.--A