Platanthera chlorantha

The greenish Platantera (scientific name Platanthera chlorantha (Custer) Rchb., 1829) is a perennial herbaceous plant with delicate flowers greenish, in the family Orchidaceae.

Description

This plant is glabrous with a height variation between 15 to 70 cm. The organic form is bulbous geophytes (G bulb), which are herbaceous perennials that bring the buds in place underground. During the season, no adverse air bodies and gems are in organs called underground bulbs, storage organs that annually produce new stems, leaves and flowers.

Terrestrial orchids are as opposed to other more exotic species, are "epiphytes", ie not living at the expense of other plants of the greater proportion.

Roots

The roots are secondary to the bulb, are sorted and fleshy and are in higher position than the bulbs.

Leaves

The leaves are completely parallel to the ribs, the shape of the lower leaves is different from Caulino (foliar dimorphism).

* Basal Leaves: The leaves are two sub-opposite, the shape is oblanceolate-elliptic or elliptic-spatula, and rounded apex. Size of leaf: width 3-8 cm, length 10 to 20 cm.
* Caulino Leaves: The leaves are closely Caulino lanceolate, acute, gradually reduced toward the inflorescence. Maximum length: 3 cm.

Inflorescence


The inflorescence is a spike with several long simple and flowers (from 9 to 32) relatively spaced. The flowers are placed under the armpits of lanceolate bracts (the lower ones are longer than the ovary) and pedicel (the pedicel is arched).

The flowers are also resupinati, turned upside down by twisting the ovary, in which case the lip is face down. Inflorescence Size: 5 to 25 cm. Bract length: 10 to 22 mm. Length of pedicel: 12 to 18 mm.

The flower

The flowers are hermaphrodite and zygomorphic irregularly, pentacyclic (perigonium to 2 whorls of tepals, two whorls of stamens (one only fertile - the other being atrophied), a w



Source: http://it.wikipedia.org/wiki/Platanthera_chlorantha


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