Tunicated With concentric layers, often of fleshy scales.
Turgid A plant part that is swollen and full of water.
Twiggy Having many divergent twigs.
Other bulbs such as Lilium longiflorum (Easter lily) are called non-tunicate or scaly because their outer scales are succulent and separate.
Tulips are known as tunicate bulbs. This means they have a 'coat' - that's the brown covering like the skin of an onion. Tulips require a cold treatment with a temperature below 40 degrees F for six to eight weeks in order to produce a flower.
The tunica is the outermost layer with the innermost layers being the corpus. In monocots, the tunica regulate the physical characteristics of the leaf edge and margin.
When storing flower bulbs like these, especially tunic varieties such as daffodils and tulips, be sure to place them in ventilated bags (brown paper bag, mesh bag, etc.) with wood shavings and store the bulbs in the refrigerator, away from any fruit.
All tulip bulbs also wear "tunics," brown papery jackets. Species tulip bulbs from cold areas usually have a woollike insulating layer within the tunic, and some, such as T. sylvestris, sport a tufted tip.
It is usually covered by a type of tunic, somewhat like that which covers the bulb and there is a basil plate from which new roots grow. During the growth cycle, the crom's food reserve is completely depleted.
Before planting remove the tunic or dry skin that covers the corm. It is a perfect harbour for one of the worst pests of the gladiolus, thrips.
An underground storage organ - strictly a thickened portion of stem with a protective skin, the 'tunic'. Corms are planted like bulbs, but the original corm dries and shrivels up during the growing season and another new one forms above it.
Bulbs can typically be separated into two separate categories - tunicate bulbs have a papery skin while scaly bulbs, as the name suggests, have a scaly outer layer. There are also hardy and tender flower bulbs.
Look for bulbs without blemishes, scars, or signs of mold. Generally, they should have their skins or tunics intact, but some flaking or splitting is normal. A bare bulb that appears otherwise healthy will likely grow and bloom just fine.
These bulbs are covered by a dark brown, or almost black papery outer covering or tunic. In their natural state the bulbs grow on the surface of the soil, or with approximately half of the bulb buried in the soil.
Plant lilies as soon as you get them, either in the fall or the spring. Because the bulbs lack the papery covering (known as a "tunic") that is common to other hardy bulbs, they can dry out quickly in storage.
When selecting any bulbs for forcing, look not only for tried and true cultivars but also for the largest, healthiest bulbs, and make sure they are firm, clean and unbruised. Tulips and hyacinths have a tunic, ...
This matters because, unlike tulips and most other true bulbs, lily bulbs have no protective outer papery skin ("tunic"). Their fleshy scales are exposed and can dry out if subjected to prolonged drying conditions.
Whether it's for Halloween, a trip to the Renaissance festival, or just for kicking around Sherwood Forest, your Robin Hood costume should consist of three main elements: tunic, tights and a feathered cap. ... Read More ...
 See also: Plant, Flower, Growing, Bulb, Planting
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