The Zafferano di Sardegna, iridácea geophyte, perennial, herbaceous plant, about 15 cm high, formed by a subterranean apparatus (bulb-tuber), from leaves and flowers with the following characteristics:
- corms - tunicates of subovoidale form, compressed at the base, tapered-rotondati and flattened apex, fleshy, internally white, covered with thin tunics crosslinked fibers, brown and stretch it to wrap the floral scapes in forms of membranous sheaths .
The weight ranges from the 0,5 25 gr; the ride height to 1 5 cm and width between 0,5 and 4 cm.
- leaves narrow, linear, elongated, deep green, surrounded by a spathe consists of whitish-3 4 layers of tunics.
The margin is entire and just papillose with a development of 60 70-cm. in length and an average width of between-2 3 mm.
There are number of 3-7.
- perianth campanulate, purplish with darker streaks, tubular in shape fauce dilated at the top from which emerge six tepals (three internal and three external) of purplish red color and length between 4 5,6 cm and are mostly solitary or in number of two or three, rarely five, each wrapped or 1 2 spate.
- stigmas whole, the Triffids red scarlet, occur in many 3, with a length between and 1,4 4,8 cm and weighs between 0,02 0,055 and gr, protruding from lacinias perigoniali.
It must also be free from any form of adulteration or adulteration.
The production area of Zafferano di Sardegna PDO includes the municipalities of San Gavino Monreale, Turri and Villanovafranca, located in the province of Medio Campidano.
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