HARDY PLANTS. 
107 
yellow-flowered. These plants are suitable for large gardens 
only, where they should be planted in masses of half-a-dozen 
or more plants in the wild garden or in partly shaded shrubbery 
borders. Ordinary soil. Plant in autumn or spring, increased 
by division in October or March. 
Calandrinia. (Rock Purslane). — Pretty dwarf hardy or 
half-hardy annuals and biennials, belonging to the Purslane 
order (Portulacaceae), hence open their flowers during sunshine 
only. C. discolor is a Chilian species, growing 12 to i8in. 
high, and bearing rosy flowers with yellow stamens in summer. 
Treat as an annual, sowing seeds in a warm border early in 
May. C. grandiflora is also a native of Chili, grows ift. high, 
has shrubby stems, and bears rose-coloured blossoms through- 
out the summer. Height 12 to i8in. Sow in the open border 
in April or May. C. oppositifolia is a Californian species 
with succulent leaves and white or blush flowers, borne in 
summer. C. umbellata comes from Peru, grows 6in. high, and 
bears magenta-crimson flowers in late summer. Both the latter 
require to be treated as half-hardy annuals, sow'ing the seeds 
thinly in pots of fine, sandy soil or peat in heat in February, 
hardening off the seedlings in a frame in May, and planting 
out in the rockery or border early in June. Each potful should 
be planted out whole, not divided. In mild districts the seeds 
of both species may be sown outdoors in May to flower the 
following season. C. umbellata sometimes assumes a peren- 
nial habit and flourishes for several seasons. 
Calendula. (Pot Marigold).— An old garden annual so 
common as to be almost classed as a weed in many gardens. 
E. officinalis, the species, belongs to the Daisy order (Com- 
positae), bears orange-yellow flowers with a dark centra freely 
throughout the summer and autumn, and often in winter. It 
grows about a foot high. Once sown it will reproduce itself 
freely from seed. The varieties, Meteor, apricot-orange, 
striped with primrose ; Orange King, orange, double-flowered ; 
Superba, a double form of the common kind ; and Prince of 
Orange, deep orange, striped with primrose, are preferable to 
the species for choice garden culture. These are desirable 
annuals for small gardens, as they are so easily grown. Sow 
the seeds where required to grow in April, and thin the seed- 
lings out to a foot apart when 6in. high. 
Callirhoe (Poppy Mallow). — Hardy herbaceous peren- 
nials, natives of N. America, and belonging to the Mallow 
order (Malvaceae). The principal species is C. involucrata, a pros- 
trate growing plant bearing large violet-crimson flow’ers with 
yellow stamens and purple stigmas in summer. It makes a most 
desirable rockery plant, but must be given plenty of ground, as 
