FLOWERING PHENOLOGY AND REPRODUCTIVE CHARACTERISTICS OF CYPRIPEDIUM MACRANTHOS (ORCHIDACEAE) IN CHINA AND THEIR IMPLICATION IN CONSERVATION

摘要

The anatomical and ecological characteristics of 7 Centaurea L. s. l. taxa (C. urvillei DC. ssp. stepposa Wagenitz, C.pseudoreflexa Hayek, C. simplicicaulis Boiss. & Huet, C. pecho Albow, C. hypoleuca DC., C. cheiranthifolia Willd.var.purpurascens (DC.) Wagenitz, C. woronowii Bornm.), which three of them are endemic (C. pseudoreflexa, C. pecho, C.woronowii) to Turkey has been carried out. Cross sections of stem, leaf blade and midrib and peripheral sections of theleaves, and pH, total N, P, K and organic matter contents of soil samples have been investigated. Variance analysis andTukey’s Honest Significant Difference test were performed on ecological and anatomical data. Ecological characteristicsobtained in this investigation were found mostly similar. On the other hand, anatomically important differences weredetermined in diversity of anticlinal cell walls, length and width of abaxial epidermis, number of bundles in the midrib andnumber of stomata per mm2both on the epidermis of the leaf, and the shape of transverse section of stem. According toTukey’s Honest Significant Difference test, especially length and width of abaxial epidermis, number of stomata both on theadaxial and abaxial epidermises have displayed three distinct groups. These results are in accordance with sectionaldelimitation in the Flora of Turkey and also support upgrading the sum of species of the genus Centaurea.