Sinadoxa corydalifolia
| Sinadoxa corydalifolia | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Sinadoxa | ||||||||||||
| CYWu , ZLWu & RFHuang | ||||||||||||
| Scientific name of the species | ||||||||||||
| Sinadoxa corydalifolia | ||||||||||||
| CYWu , ZLWu & RFHuang |
Sinadoxa corydalifolia is the only species of the plant genus Sinadoxa withinthe musk herb family (Adoxaceae). It occurs only in the southern part of the Chinese province of Qinghai and was only described in 1981.
description
Appearance and foliage leaf
Sinadoxa corydalifolia grows as a perennial herbaceous plant and reaches heights of 10 to 25 cm. All parts of the plant are bare. Upright rhizomes are formed as persistence organs and fiber roots. There are two to four upright to ascending, green, bare stems in tufts together, which have a diameter of 3 to 5 mm.
There are about ten basal leaves and two opposite stem leaves. The basal leaves are about 10 cm long and the stem leaves are 1 to 2 cm long stalked. The leaf blade of the basal leaves is one to two triple pinnate and the end section is ovate or ovate elongated or irregularly pinnate or pinnate at a length of 3 to 10 cm, the end sections being three to multiple lobes or split and the side sections with a length of 1.5 to 2 cm egg-shaped or three-lobed. The leaf blade of the stem leaves is 2.5 to 5 cm long in outline ovate-triangular and simply triple pinnate, with the end section being ovate and irregularly lobed at a length of 1.5 to 3.5 cm and the side sections at one Length from 0.8 to 1.8 cm ovoid-elliptical or ovoid and three-, five- or ten-lobed. Stipules are absent.
Inflorescence, flower and fruit
The flowering time in the home area extends from June to July. In a terminal, up to 8 cm long, interrupted, annual total inflorescence , zymous partial inflorescences each contain three to five flowers. The lowest partial inflorescence are above long inflorescence shafts in the axils of the stem leaves and their flowers are small.
The hermaphrodite flowers are radial symmetry and three or four-fold with a double flower envelope . The yellowish-green, fleshy sepals are cup-shaped fused with mostly three, rarely two or four calyx tips. The calyx tips are sack-shaped and closed and winged narrowly on the back. The three or four yellowish-brown petals form with a diameter of 2 to 3 mm wheel-shaped corolla with a short corolla tube and three or four corolla lobes. The elongated egg-shaped corolla lobes are dotted with glands on the inner sides near the upper end and have nectaries at their base.
Only the outer circle contains three or four fertile stamens . The inner circle of stamen contains three or four staminodes . The 1.5 mm long stamens inserted in the throat of the corolla tube have two columns up to their base. The yellow, outwardly curved anthers have only one theka and are spherical with a diameter of about 0.5 mm. The two carpels have become an ovoid-spherical, half under constant, single-chamber ovary grown. The ovary contains only one hanging ovule . There is no stylus recognizable and the sessile scar is punctured.
The authors of the Flora of China did not describe fruits .
Chromosome number
The basic chromosome number is x = 9; there is tetraploidy , i.e. 2n = 36.
Systematics and distribution
The genus Sinadoxa was founded in 1981 by Cheng-yi Wu, Zhen Lan Wu and Rong Fu Huang in Acta Phytotaxonomica Sinica , Volume 19, Issue 2, p. 207 with the first description of the only species Sinadoxa corydalifolia C.Y.Wu, ZLWu & RFHuang on p. 208 , Table 2 set up. The holotype specimen was collected on July 9, 1965 by YC Yang in the Chinese province of Qinghai in Nangqen, at an altitude of 4100 meters.
The species Sinadoxa corydalifolia occurs only in the southern part of the Chinese province of Qinghai in Nangqên and Yushu. It thrives on rocky outcrops, wet gorges and alpine rubble slopes at altitudes between 3900 and 4800 meters.
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literature
- Deyuan Hong & David E. Boufford: Sinadoxa and Sinadoxa corydalifolia , p. 613 - online with the same text as the printed work , In: Wu Zheng-yi, Peter H. Raven & Deyuan Hong (eds.): Flora of China , Volume 19 - Cucurbitaceae through Valerianaceae, with Annonaceae and Berberidaceae , Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, February 28, 2011. ISBN 978-1-935641-04-9 (section description, distribution and systematics)
Individual evidence
Web links
- Sinadoxa corydalifolia inthe IUCN Red List of Threatened Species 2013.1. Listed by: China Plant Specialist Group, 2004. Retrieved September 28, 2013.