Tubers are enlarged structures used as storage organs for nutrients in some plants. They are used for the plant's perennation, to provide energy and nutrients for regrowth during the next growing season, and as a means of asexual reproduction. Stem tubers form thickened rhizomes or stolons ; well known species with stem tubers include the potato and yam. Some writers also treat modified lateral roots under the definition; these are found in sweet potatoes, cassava, and dahlias.
Cyclamen is a genus of 23 species of perennial flowering plants in the family Primulaceae. Cyclamen species are native to Europe and the Mediterranean Basin east to the Caucasus and Iran, with one species in Somalia. They grow from tubers and are valued for their flowers with upswept petals and variably patterned leaves.
Crinum is a genus of about 180 species of perennial plants that have large showy flowers on leafless stems, and develop from bulbs. They are found in seasonally moist areas, including marshes, swamps, depressions and along the sides of streams and lakes in tropical and subtropical areas worldwide.
A storage organ is a part of a plant specifically modified for storage of energy (generally in the form of carbohydrates) or water. Storage organs often grow underground, where they are better protected from attack by herbivores. Plants that have an underground storage organ are called geophytes in the Raunkiær plant life-form classification system. Storage organs often, but not always, act as perennating organs which enable plants to survive adverse conditions.
Scilla section Chionodoxa, known as glory-of-the-snow, is a small group of bulbous perennial flowering plants in the family Asparagaceae, subfamily Scilloideae. Formerly treated as the separate genus Chionodoxa, they are now included in Scilla as a section. The section is endemic to the eastern Mediterranean, specifically Crete, Cyprus and Turkey. The blue, white or pink flowers appear early in the year making them valuable garden ornamentals. The common name of the group is based on the habit of flowering in high alpine zones when the snow melts in spring.
Cyclamen graecum, the Greek cyclamen, is a perennial plant in the flowering plant family Primulaceae that grows from a tuber. It is native to southern Greece, southern Turkey and neighboring islands and is prized for its variable leaf forms, which include some of the most striking of any cyclamen.
Ornamental bulbous plants, often called ornamental bulbs or just bulbs in gardening and horticulture, are herbaceous perennials grown for ornamental purposes, which have underground or near ground storage organs. Botanists distinguish between true bulbs, corms, rhizomes, tubers and tuberous roots, any of which may be termed "bulbs" in horticulture. Bulb species usually lose their upper parts during adverse conditions such as summer drought and heat or winter cold. The bulb's storage organs contain moisture and nutrients that are used to survive these adverse conditions in a dormant state. When conditions become favourable the reserves sustain a new growth cycle. In addition, bulbs permit vegetative or asexual multiplication in these species. Ornamental bulbs are used in parks and gardens and as cut flowers.
Cyclamen hederifolium, the ivy-leaved cyclamen or sowbread, is a species of flowering plant in the family Primulaceae. This widespread cyclamen species is widely cultivated and among the most hardy and vigorous in oceanic climates. It is native to woodland, shrubland, and rocky areas in the Mediterranean region from southern France to western Turkey and on Mediterranean islands, and naturalized farther north in Europe and in the Pacific Northwest.
Cyclamen purpurascens, the Alpine, European or purple cyclamen, is a species of flowering plant in the genus Cyclamen of the family Primulaceae, native to central Europe, northern Italy, and Slovenia. It is an evergreen tuberous perennial with (usually) variegated leaves, and deep pink flowers in summer.
Cyclamen coum, the eastern sowbread, is a species of flowering plant in the family Primulaceae. It is a tuberous herbaceous perennial, growing to 5–8 cm (2–3 in), with rounded heart-shaped leaves and pink shell-shaped flowers with darker coloration at the base. It is valued in horticulture as groundcover, and for the flowers which bloom in winter and early spring.
Cyclamen persicum, the Persian cyclamen, is a species of flowering herbaceous perennial plant growing from a tuber, native to rocky hillsides, shrubland, and woodland up to 1,200 m (3,900 ft) above sea level, from south-central Turkey to Lebanon-Syria and the Palestine region. It also grows in Algeria and Tunisia and on the Greek islands of Rhodes, Karpathos, and Crete, where it may have been introduced by monks. Cultivars of this species are the commonly seen florist's cyclamen.
Cyclamen cilicium is a species of flowering perennial plant in the family Primulaceae. It is native to coniferous woodland at 700–2,000 m (2,300–6,600 ft) elevation in the Taurus Mountains of southern Turkey.
Cyclamen parviflorum, the small-flowered cyclamen is a flowering perennial plant growing from a tuber, native to high elevations in the Pontic Mountains of northern Turkey. It is the smallest cyclamen species and the only one native to alpine tundra.
Cyclamen rohlfsianum is a species of perennial plant in the family Primulaceae. It is endemic to Libya. It grows from a tuber in shrubland, especially in limestone cracks, up to 450 m (1,500 ft) above sea level. It is one of the tenderest cyclamen species. The plant was discovered by Friedrich Gerhard Rohlfs in 1879, and was named after him in 1897 by Paul Friedrich August Ascherson.
Cyclamen balearicum, the Majorca or Balearic cyclamen, St. Peter's violet or sowbread, is a perennial plant growing from a tuber, native to shady areas in woodland of short evergreen trees and shrubs up to 1,443 m (4,734 ft) above sea level in the Balearic Islands and in isolated locations in France from the Pyrenees to the Rhone valley.
Cyclamen repandum, the spring sowbread, is a species of flowering plant in the family Primulaceae, native to southern Europe and some Mediterranean islands. It is the most widespread of a group of cyclamens with wide, heart-shaped leaves, often coarsely toothed or lobed, and late spring-blooming flowers with long, slender petals.
Cyclamen libanoticum is a species of flowering plant in the family Primulaceae. It is native to a small area in the mountains of Lebanon northeast of Beirut at 750–1,400 m (2,460–4,590 ft) elevation, in and around Jabal Moussa Biosphere Reserve. From winter to spring, it bears peppery-smelling flowers with 5 oval petals opening white, then turning pale pink, usually with an irregular crimson-magenta mark at the base. Leaves are heart-shaped, gray-green with a darker arrowhead pattern. The tuber only produces roots from one side of the bottom.
Cyclamen pseudibericum, the false Iberian cyclamen, is a species of flowering plant in the genus Cyclamen of the family Primulaceae, native to the Amanus or Nur and Anti-Taurus Mountains in southern Turkey. It is an herbaceous, tuberous perennial growing to 12 cm (5 in). It is similar to Cyclamen coum, but with longer petals.
Crocus graveolens is a species of flowering plant in the family Iridaceae. It is native to Lebanon, Palestine, Syria, and Turkey.
Iris heylandiana is a species in the genus Iris, it is also in the subgenus Iris, and in the section Oncocyclus. It is a rhizomatous perennial, from the marshlands or fields of Iraq. It has short, linear or sickle shaped grey-green leaves, slender stem, a single flower in spring, which has a dingy-white, whitish, or pale background, which is covered in many spots or dark veining, in black-purple, brown-purple, or brown violet, or brown shades. It has a dark brown or burgundy brown signal patch and white tinged with yellow or orange white sparse beard. It is rarely cultivated as an ornamental plant in temperate regions, as it needs very dry conditions during the summer.
