The term orris root is used to denote the roots of a number of species, including Iris germanica, Iris pallida and Iris florentina. They have a very sweet fragrance, which is more distinct in some bearded irises compared to others. The aroma of the flowers of a particular species known as Iris pallida is considered to be the best. In fact, it is difficult for one to miss the characteristic fragrance of this flower, which blooms during spring. Just take a sniff of the aroma and you will surely admit that its smell is akin to that of grape soda.
The flowers of Iris pallida measure about four inches in diameter and appear in the later part of spring. Every branched stem of this plant bears anything between two and six attractive pale bluish-purple blooms.
Native to Croatia, this plant is not only popular for the typical fragrance of its flowers. Gardeners look for this plant as well as grow it for its wonderful multi-colored foliage, which is equally attractive as its flowers. The plant normally grows up to a height of two feet and bears clusters of broad and stiff leaves. Clusters of these green and creamy yellow plants may be used to enhance the look of any woodland garden. A white-and-green variety of this plant is also available.
Like in the case of other iris species, there are numerous different ways in which you can use the Iris pallida plants in your garden. You can plant them with different bulbs with a view to creating a vibrant, multicolored spring show. In fact, these plants accentuate the beauty of any perennial bed. The foliage alone of these plants is so attractive that it enhances the eminence of the plants in your garden. The plants grow up to a moderate height and this makes it possible to grow them in pots and place them in appropriate locations to attract attention as well as augment the beauty of the place.
As it is not difficult to grow Iris pallida, it is possible to plant this species anywhere you wish to and enjoy their beauty perpetually. You only need to provide these plants with some nourishment during the flowering season and shade during the midday to ensure that they readily multiply their clumps. Among all varieties of bearded irises, this species is considered to be the hardiest plant. In fact, when grown in places having mild climatic conditions, the foliage of the plant will remain almost throughout the year. Moreover, deer do not browse on this species, even if they do, the plants have the aptitude to resist the invasion. The plants also provide us aromatic cut flowers making them one of the most favored bearded iris varieties.
This iris species is also called Dalmatian iris for the reason that it is indigenous to Croatia’s Dalmatia province, where it has been cultivated for several centuries. In fact, Iris pallida is a forerunner of the present-day bearded irises. Occasionally, people cultivate this species as an orris source, which is obtained from the plant’s rhizomes and used in the manufacture of perfumes and also breath fresheners.
Pallida is a Latin term that denotes pale while the word Dalmatica implies ‘from Dalmatia’. Often, this species is also called “The Sweet Iris”. However, it is also referred to as Iris Odo Rati sima and Iris glauca. This species is indigenous to Dalmatia, the European Alps and Crimea.
Many botanists are of the view that although people cultivated Iris pallida since much before 1600, the species was named officially only in 1789. This plant is a favorite of several gardeners owing to its endurance power and aroma. The plant has broad bluish-green foliage that resembles a sword. Although the firm spikes of the plant are poorly branched, each of them bears as many as eight lavender-blue aromatic blooms. It is easy to distinguish Iris pallida, as its flowers are papery and its large and colorful bracts (spathes) often cover the buds having yellowish beards. This species keeps growing in beautiful clumps, which do not divide for several months together.
The blooms of Iris pallida have more of lilac blue and are widely used by gardeners hybridizing plants for the vital underpinning of the present-day hybrid species known as the Tall Bearded Iris. Provided the plants of this species are grown in a well-drained soil and sunlit position, they grow vigorously and are very hardy. This iris variety is most widely used for producing orris root. The aromatic dehydrated rhizomes of these plants are used for making perfumes. Iris pallida are cultivated in large fields in the region around Florence and the magnificent blue carpet formed by their flowers during May every year will leave you awe-struck.
Iris pallida root has numerous uses and supplies Orris powder, which has a high demand in the perfumery industry. The dried up roots of the plant are pulverized to obtain Orris, whose aroma is akin to that of violets. In addition to being used in the form of a fixative in perfumes as well as potpourri, Orris root is also used in the manufacture of breath fresheners, toothpaste, and similar products. It is also widely used in the form of a food essence.
It may take several years for Iris pallida roots to dry properly so as to develop the right fragrance. The flavor of the fresh root of this plant is acrid and it is almost fragrance-free. The fresh roots yield an essential oil and it can be used for the same purposes for which the dried roots are used. The root also yields a black dye, while the flowers yield a blue dye. Besides growing the plants for its attractive, aromatic flowers and its roots, you may also cultivate Iris pallida for ground cover. The roots of this plant are so densely matted that they do not allow any weed to grow.
Occasionally, the juice extracted from Iris pallid roots is employed in the form of a cosmetic and it also helps to get rid of freckles on the skin. The juice obtained from the fresh roots is a potent cleanser and can be used effectively for treating dropsy (a condition that was earlier known as edema).
The dried roots can be pounded into a powder and used to flavor foods. In fact, the fresh root is almost neutral and does not have any fragrance. It generally takes many years for the dried roots to develop their characteristic fragrance. The dried roots of Iris pallida yield an essential oil called the “Orris oil”, which is used to add essence to sweets, soft drinks, chewing gums and other food products.
Iris pallida need a well-drained limey soil and sunlit position to achieve optimum growth. When grown in sunlit position, it is very easy to cultivate this plant in any common garden soil. Its preferred pH level ranges between 6.0 and 7.5. However, it can grow well in soils having a higher pH. Plants that have established themselves well possess the aptitude to tolerate drought conditions.
Iris pallida are mainly cultivated for the essential oil contained in its roots, particularly in Italy. The flowers of this plant have a sweet aroma that will possibly remind you of orange blossoms. Some people also compare the aroma of Iris pallida flowers to that of vanilla, grape or civet. This is a very vigorously growing species. The rhizome of this plant should be placed slightly above the level of the soil. Plants belonging to this genus are seldom if ever, disturbed by rabbits or browsing deer.
Propagation: Iris pallida is mainly propagated by its seeds, which should be ideally sown in a cold frame immediately after they ripen. When the seedlings have grown large enough to be handled, you should prick them out individually and plant them in separate containers or pots and continue growing them in a cold frame or a greenhouse at least for the first year of their existence. The grown up young plants can be planted outdoors into their permanent positions either during the end of spring or the early part of summer.
It is also possible to cultivate Iris pallida by means of root division. Although it is best to undertake root division of this plant soon after its flowering season, you can also do it throughout the year. Growing this plant from its root divisions is very easy and you can directly plant the larger root clumps outdoors in their permanent position. However, if the clumps are small you should plant them in pots and continue growing them in a cold frame till they root properly. Ideally, you should plant them outdoors during the spring.
The soft young shoots may be victims of snail and slug invasions. In addition, bacterial infections may result in extensive discoloration (blighting) of the leaves. Other problems may include crown disintegration or decay.
Chemical analysis of orris root has revealed that it primarily contains the oil of orris in measures of anything between 0.1 percent and 0.2 percent. Oil of orris is a pale yellowish to yellow mass that encloses approximately 85 percent of neutral or fragrance-free myristic acid, which is apparently released from a type of fat found in the plant’s rhizome when it is processed or steam distilled. Commercially, the oil of orris is known as Orris butter.
In addition to the oil of orris, the plant also contains resin, fat, large amounts of starch, a bitter-tasting extract, mucilage and a glucoside called iridin. It is important that you don’t mistake iridin for the powdered extract called irisin or iridin. In fact, the extract iridin or irisin is made from the rhizome of another Iris species known as the Iris versicolor, which is basically an American plant.
As several plants belonging to this genus are believed to be poisonous when taken orally, it is advised that you exercise caution while using these plants. In fact, the roots of these plants are more likely to be noxious. In some people, these plants may cause allergies and skin irritations.