Freesia is a genus of herbaceous perennial flowering plants in the family Iridaceae, first described as a genus in 1866 by Chr. Fr. Echlon (1795-1868) and called after German botanist and doctor Friedrich Freese (1794-1878). It is indigenous to the eastern area of southern Africa, from Kenya south to South Africa, most types being within Cape Provinces. Species of the former genus Anomatheca are now contained in Freesia. The crops often called "freesias", with fragrant funnel-shaped blossoms, are cultivated hybrids of lots of Freesia species. Some other species are also grown up as ornamental crops.
These are herbaceous plants which expand from a conical corm 1-2.5 cm diameter, which directs up a tuft of narrow leaves 10-30 cm long, and a sparsely branched stem 10-40 cm tall bearing a few leaves and a loose one-sided spike of plants with six tepals. Many species have fragrant narrowly funnel-shaped plants, although those formerly put in the genus Anomatheca, such as F. laxa, have flat flowers. Freesias are used as food plants by the larvae of some Lepidoptera kinds including Large Yellowish Underwing.
CULTIVATION AND USES
The crops usually called "freesias" are derived from crosses manufactured in the 19th hundred years between F. refracta and F. leichtlinii. Numerous cultivars have been bred from these types and the red- and yellow-flowered varieties of F. corymbosa. Modern tetraploid cultivars have flowers ranging from white to yellow, red, red and blue-mauve. They can be mostly cultivated properly in holland by about 80 growers.[3] Freesias can be quickly increased from seed. Because of the specific and pleasing scent, they are generally used in palm lotions, shampoos, candles, etc.[citation needed], however, the plants are mainly used in wedding bouquets. They can be planted in the fall in USDA Hardiness Areas 9-10 (i.e. where the temperature will not show up below about -7 ?C (20 ?F)), and in the spring in Areas 4-8.
Freesia laxa (previously called Lapeirousia laxa or Anomatheca cruenta) is one of the other types of the genus which is often cultivated. Smaller than the scented freesia cultivars, they have flat alternatively than cup-shaped blooms. Extensive 'forcing' of this bulb occurs in Half Moon Bay in California where several growers chill the lights in proprietary solutions to satisfy wintry dormancy which results in formation of buds inside a predicted volume of weeks - often 5 weeks at 55 ?F (13 ?C).
Herbaceous vegetation (in botanical use frequently simply herbal selections) are crops that contain no consistent woody stem above surface. Herbaceous vegetation may be annuals, biennials or perennials. Total annual herbaceous plants die completely at the end of the growing season or when they have flowered and fruited, and they then grow again from seed. Herbaceous perennial and biennial plants may have stems that pass away at the end of the growing season, but elements of the plant make it through under or near the ground from season to season (for biennials, until the next growing season, when they flower and perish). New expansion produces from living cells remaining on or under the ground, including root base, a caudex (a thickened part of the stem at ground level) or numerous kinds of underground stems, such as bulbs, corms, stolons, rhizomes and tubers. Types of herbaceous biennials include carrot, parsnip and common ragwort; herbaceous perennials include potato, peony, hosta, mint, most ferns and most grasses. In comparison, non-herbaceous perennial vegetation are woody plants which have stems above surface that continue to be alive during the dormant season and grow shoots the next calendar year from the above-ground parts - these include trees and shrubs, shrubs and vines.
hoa Phượng, hoa điệp vàng lại nở hoa rực cả một góc
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Hoa ưu đàm là hoa gì ?
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