Part 14

Ordinary well-drained garden soil of a more or less sandy nature will suit the Ornithogalums. They are easily increased by offsets.

=PANCRATIUM.=--Most of the plants in this genus require to be grown in heat and moisture under glass. Two species, however--both with clusters of white sweet-scented flowers on stout stalks 1 to 2 feet high--can be grown in the open air in the milder parts of the British Islands. They are P. illyricum and P. maritimum, both natives of Southern Europe. They have large pear-shaped bulbs with a tapering neck 9 to 12 inches long, and consequently require to be planted pretty deeply, say about a foot in September. A well-drained sandy loam and leaf-soil suits them best, and they may be increased by offsets.

=POLIANTHES tuberosa= (Tuberose).--Although what are known as African, American, Italian, and Pearl Tuberoses, are usually grown in warm greenhouses, nevertheless the plants may be grown with a fair degree of success in the open air in the milder parts of the kingdom. The thickish bulbs, about 2 inches through, may be planted out about the end of May, only just covering the tops with an inch or two of soil. The thin and narrow leaves will soon appear, and about August the pure waxy-white heavily-scented blossoms will be thrown up on stalks 2 to 3 feet high, that may require a thin stake to keep them erect. There are single and double-flowered varieties, the latter being most popular for cultivation under glass. For this purpose the bulbs may be treated as advised at p. 46.

=PUSCHKINIA scilloides.=--A charming little plant, with ovoid bulbs about an inch through, and narrow leaves about 6 inches long. About March and April the white or very pale blue blossoms appear, and are decorated with a conspicuous deep-blue line down the centre of each segment. Warm sheltered spots in the rock-garden or flower border, and a compost of rich sandy loam and leaf-soil suit this plant best. The bulbs should be planted, 3 or 4 inches deep, in September or October (but not later), and may, if convenient, remain in the same spot for three or four seasons without being lifted. This is best done when the foliage has withered, and will give an opportunity for detaching the offsets to increase the stock.

=SCHIZOSTYLIS coccinea.=--A charming South African plant, 2 to 3 feet high, with the appearance of a Gladiolus in the sword-like leaves. The brilliant crimson blossoms, each about 2 inches across, appear from September to November, and consequently often get spoiled by the weather unless protected. They are excellent for cutting and valuable so late in the season. The plants flourish in rich sandy loam, peat and leaf-soil, and are more satisfactory in the open air in the mildest parts of the kingdom. In other parts they should be planted on a sheltered south border where they can be protected in winter if necessary. Grown in pots, the plants are popular for greenhouse decoration. Increase is effected by dividing the thickish rootstocks in spring.

PLATE 28. GLADIOLUS NANCEIANUS (103) GLADIOLUS LEMOINEI (104) GLADIOLUS CHILDSI (105)

=SCILLA= (Squill; Bluebell).--The Squills and Bluebells are amongst the most charming of our spring-flowering bulbous plants, and it is astonishing that they are not more extensively utilised for naturalising in the grass, with Snowdrops, Crocuses, Narcissi, Chionodoxas, &c., with which they harmonise so well. Preferring partially shaded spots, they are particularly valuable for planting in woodland walks, and beneath our native trees in parks and pleasure grounds. The hardier kinds require practically no cultivation, and will flourish in any of the places indicated or in ordinary garden soil in the rock-garden or flower border. The best time to plant is about September and October, and as the bulbs are 1-1/2 to 2 inches in diameter, they should be buried about 3 or 4 inches deep, and in hundreds and thousands if possible instead of in twos and threes.

The best-known member of the genus is undoubtedly our Common British Bluebell or Wood Hyacinth (S. festalis). It is to be found in abundance in woods and copses, and from April to June sends up its tall stalks of drooping bell-shaped flowers, the colour of which varies from bluish-purple to white or pink, according to the several varieties, such as alba, rosea, and rubra, &c.

Another fine species is the Spanish Bluebell (S. hispanica or S. campanulata), perhaps the finest-looking Bluebell in the open air. The ordinary variety has porcelain-blue flowers on stalks a foot or more high. It is surpassed in beauty, however, by its white variety alba, which flowers freely and grows vigorously. There are also forms with pink or rosy flowers, such as rosea or carnea, rubra, &c., all of which appear in April and May.

The species, however, that finds so much favour for autumn planting is S. sibirica, a charming species, with purple-coated bulbs, and bright porcelain-blue blossoms with more or less spreading segments. They appear in February and March on stalks 3 to 6 inches high, but are more numerous in the variety called multiflora (see Plate 2, fig. 7). Owing to its early blooming, it is of course a great favourite with other early flowering plants.

Other kinds of Scilla that may be grown in the open air in the same way as those already mentioned are:--The Star Hyacinth (S. amoena), which requires rather warm sheltered spots. It has bright indigo blue flowers with spreading segments from March to May. S. bifolia grows 6 to 9 inches high, and produces its bright-blue, bell-shaped flowers in March. There are several forms of it, such as alba, white, rosea, pale rose, &c. S. hyacinthoides, bluish-lilac; S. italica, blue; S. verna, porcelain-blue; S. patula, deep blue with white edges; and S. monophylla, with blue or violet flowers, all appearing in April and May.

Quite distinct in appearance from all these is S. peruviana, which, by the way, is not a native of Peru, but of the Mediterranean region. It has large, pear-shaped bulbs, and rosettes of leaves 6 to 12 inches long, with bristly margins. The bright blue starry blossoms appear in May and June, and are borne in broadly conical clusters, which elongate during the flowering period. There are white (alba) and yellow (lutea) varieties, the first-named of which is shown on Plate 17, fig. 69.

This species may be grown in warm sheltered spots in the border or rock-garden, in dryish, well-drained soil. The bulbs should be planted 4 to 6 inches deep, and in cold localities should be protected from severe frosts in winter.

Scillas may be increased by offsets taken from the old bulbs when the foliage has withered.

=SISYRINCHIUM grandiflorum.=--This is the best garden plant out of about fifty species. Like Schizostylis coccinea, it can scarcely be called a "bulbous" plant, as it has only short thickened rootstocks. It grows about a foot high, having striated leaves, and deep purple blossoms (as shown in Plate 20, fig. 79), which, however, are white in the variety album. It is an excellent plant for the rock-garden, where it should be planted in bold clumps, in light sandy loam and peat. Increased by division of the rootstocks about September.

=SPARAXIS.=--The plant best known under this name has been already described as Dierama pulcherrima at p. 71. The Sparaxis proper are little known plants, the best known being (i) grandiflora, which grows 1 to 2 feet high, and has bell-shaped flowers of deep violet-purple in April and May. There are many colour variations of this species (including a white one), several of them having a deeper coloured blotch at the base of the petals. (ii) Tricolor, resembles grandiflora in appearance, but has rich orange-red blossoms with purple-brown blotches on the yellow base of the petals. There are also several forms of this species with white, rose, or purple flowers, all having a yellow centre with distinct blotches at the base of the petals.

These South African plants require the same treatment as Dierama pulcherrima or the Ixias (see p. 89). They like warm sheltered spots in the mildest parts of the kingdom, and when well-grown are very showy and useful for cutting.

PLATE 29. ZEPHYRANTHES ATAMASCO (106) ORNITHOGALUM ARABICUM (107) ORNITHOGALUM NUTANS (108)

=SPREKELIA formosissima= (Jacobaea Lily).--A fine Mexican plant, with roundish bulbs 2 to 3 inches in diameter, and narrow strap-shaped leaves 12 to 18 inches long. In the open air the irregular bright crimson blossoms, each about 6 inches across, appear about August, and never fail to attract attention.

Unfortunately, the Jacobaea Lily, of which there are a few colour variations, can scarcely be considered as perfectly hardy in the mildest parts of the British Islands. It often flowers, however, when the bulbs are planted out about the end of May or early in June, when danger from frost is practically over. The flowers often appear before the foliage, but the bulbs should not be lifted in autumn for storing until the leaves show signs of withering. New plants are secured from offsets.

=STERNBERGIA.=--Charming plants, with roundish bulbs about 2 inches in diameter, and strap-shaped leaves, which are in their prime sometimes with the blossoms, as in S. lutea, and sometimes long before the latter appear, as in S. macrantha. The bulbs should be planted in spring, 5 or 6 inches deep, in rich and well-drained sandy loam and leaf-soil. When in bold clumps the flowers present a charming sight, either in the grass, rock-garden, flower border, or margins of thin shrubberies. All kinds have beautiful crocus-like yellow flowers as shown in Plate 33. S. lutea (fig. 119), variously known as the "Winter Daffodil" and "Yellow Star Flower," is considered to be the "Lily of the Field" mentioned in the Scriptures. It blooms in September and October, the yellow flowers nestling amongst the leaves. There are several forms of it, differing chiefly in the size of the blossoms and width of the leaves. S. macrantha (fig. 120) is a still finer species, with flowers much larger than those of S. lutea, with which they appear in autumn. Other species are colchiciflora, the bulbs of which are only about an inch in diameter, and the pale-yellow sweet-scented flowers appear in autumn. S. Fischeriana also has bright golden-yellow blossoms, but differs from its relatives in producing them during the spring months--February onwards--instead of in the autumn.

=TECOPHILAEA cyanocrocus.=--This distinct and charming Chilian plant, popularly known as the "Chilian Crocus," has fibrous-coated corms and narrow wavy leaves. The beautiful Violet-scented, funnel-shaped flowers of a brilliant blue, with a white centre, appear in March and April, borne in loose trusses. (See Plate 12, fig. 50.) The variety Leichtlini differs in having deeper blue flowers than the type, and without the white centre.

In the milder parts of the kingdom the Chilian Crocus may be grown in the open air in warm sheltered spots, such as on a south border at the base of a wall or fence. Rich sandy loam and leaf-soil is a good compost into which the corms may be planted, 6 to 9 inches deep, about September. In winter it may be necessary to give protection with litter, bracken, &c., in the event of severe frosts or continuous cold rains. The plants are most readily increased by offsets.

=TIGRIDIA Pavonia= (Peacock Tiger Flower).--There are several species of Tiger Flowers, but the one here mentioned, and its several varieties, are the most useful for the out-door garden. They have bulbs 1-1/2 to 2 inches in diameter, and plaited Gladiolus-like leaves. The blossoms, however, one of which is shown on Plate 30, fig. 110, are of exceptional beauty and brilliance amongst bulbous plants, and although they do not last a long time individually, they nevertheless follow each other so rapidly that the plants are scarcely ever without flowers during the summer months. The coloured picture will convey a far better idea as to the colouring and blotching of the flowers than any printed description. There are other varieties of T. Pavonia besides the one shown on the Plate. Perhaps the best are grandiflora, very large and brilliant; conchiflora, yellow blotched with purple; Wheeleri, deep red; and alba, pure white spotted with purple.

The Tiger Flowers are natives of Mexico, and therefore cannot be grown successfully in the open air in all parts of the kingdom. In the mildest parts, however, the bulbs may be left in the ground during the winter months, care being taken to protect them with leaves, litter, &c., during severe weather, or from heavy cold rains. In less favoured spots, where they nevertheless blossom out of doors in summer, the bulbs may be taken up about the end of October when the foliage has withered, and they may then be stored in frost-proof places in sand until the following April or May. Whenever the bulbs are lifted the offsets should be detached to increase the stock. The warmest, most sheltered, and sunniest spot in the garden is obviously the best place for Tigridias. In addition to this the soil should be a well-drained sandy loam enriched with old cow-manure and leaf-soil. During active growth, and especially in the hot dry seasons, it is necessary to keep the plants well-supplied with water, otherwise the results are likely to be the reverse of satisfactory.

=TRITONIA.=--This genus contains a handsome group of plants with fibrous-coated corms, like those of a Gladiolus, but much smaller. The plants formerly known as Montbretia are now also included in this genus, but the corms in some cases (e.g., M. crocosmiaeflora) have slender creeping rhizomes, from which new corms are developed by the end of the season. The leaves are more or less like those of a Gladiolus, but somewhat narrower, and often curved, while the showy blossoms are borne in slender graceful spikes, that are very useful for cutting.

Only a few species and their numerous varieties are cultivated in the open air, being either massed in bold clumps in the ordinary flower border or rockery, or as beds by themselves in the grass. Being natives of South Africa, warm, sheltered, and sunny situations, and a light loamy soil, enriched with leaf-soil or well-decayed manure, naturally suit them best. Although perfectly hardy in all except the bleakest parts of the kingdom, the kinds mentioned below are best taken up and replanted each year or two in the spring time. It is not, however, essential to lift the corms in the autumn and store them in sand except in very cold parts where protection would be troublesome perhaps. A glance at the drawings on p. 26 will show the reader that offsets are freely produced, and in this way the kinds are most easily propagated.

The kinds most suitable for open air culture are: T. crocata (formerly known under the names of Ixia and Gladiolus) grows about 2 feet or more high, having broadly sword-shaped and curved leaves, and spikes of yellow or orange-coloured blossoms in June and July. There is a good deal of variation in the colour, some varieties being much paler or darker than others, and spotted with red, yellow, or brown.