Sinadoxa
Sinadoxa corydalifolia is the only species of the plant genus Sinadoxa within the family of musk herb plants ( Adoxaceae ). It occurs only in the southern part of China's Qinghai Province and was not described until 1981.
- 3.1 Literature
- 3.2 Notes and references
Description
Appearance and foliage leaf
Sinadoxa corydalifolia grows as a perennial herbaceous plant, reaching stature heights of 10 to 25 cm. All plant parts are bare. Are formed as outlasting and fiber roots upright rhizomes. There are two to four tufted erect to ascending, green, bare stems together, which have a diameter of 3 to 5 mm.
There are about ten basal leaves and two against constantly arranged stem leaves. The basal leaves are about 10 cm long and the stem leaves are petiolate 1 to 2 cm long. The leaf blade of basal leaves is pinnate once or twice ternate and the end section is ovate or ovate oblong or pinnately irregularly or pinnately lobed with a length of 3 to 10 cm, the end portions of three to be multi-lobal or split and the side sections with a length of 1.5 to 2 cm are egg-shaped or three-lobed. The leaf blade of cauline ovate - triangular and simply pinnate ternate with a length of 2.5 to 5 cm in outline, the end portion being lobed ovoid and irregular, with a length of 1.5 to 3.5 cm and the side portions at a length from 0.8 to 1.8 cm ovate -elliptic or ovate, and three -, five - or zehnlappig. Stipules are absent.
Inflorescence, flower and fruit
The flowering period extends the home area from June to July. In a terminal, to 8 cm long, interrupted aged men total inflorescence stand together zymöse partial inflorescences, each containing three to five flowers. The lowest part of inflorescence are overlong Blütenstandsschäften in the axils of the stem leaves and their flowers are small.
The hermaphrodite flowers are radial symmetry and three - or fourfold with a double perianth. The yellowish- green, fleshy sepals are fused cup-shaped, usually with three, rarely two or four calyx lobes. The sepals are saccular and closed and narrow winged on the back. The three or four yellowish brown petals form wheel- corollas short corolla tube and three or four Kronlappen with a diameter of 2 to 3 mm. The oblong- ovate Kronlappen are dotted with glandular on the inner sides near the top end and have nectaries at their base.
Only the outer circle contains three or four fertile stamens. The inner stamen circle contains three or four staminodes. The mouth of the corolla tube inserted in, 1.5 mm long stamens are two columns to their base. The yellow, outwardly bent dust bag having only a theca and are spherical with a diameter of about 0.5 mm. The two carpels are fused to an ovate - spherical, semi- permanent under, unilocular ovary. The ovary contains only one hanging ovule. There is no recognizable style and the seated scars is punctured.
Fruits, the authors of the Flora of China have not been described.
Chromosome number
The basic chromosome number is x = 9; it is present tetraploid, ie 2n = 36
Systematics and distribution
The genus Sinadoxa in 1981 by Cheng -yi Wu, Zhen Lan Wu and Rong Fu Huang in Acta Phytotaxonomica Sinica, Volume 19, Issue 2, pp. 207, with the first description of single species Sinadoxa corydalifolia CYWu, ZLWu & RFHuang on S. 208, situated panel 2. The Holotypusexemplar was collected on July 9, 1965 by YC Yang in the Chinese province of Qinghai in Nangqen, at an altitude of 4100 meters.
The type Sinadoxa corydalifolia occurs in Nangqên and Yushu only in the southern part of China's Qinghai province. It grows on rocky outcrops, moist gorges and alpine scree slopes at altitudes 3900-4800 meters.