New forms of Doritis pulcherrima var . apiculata
Olaf Gruss
Y ok Don National Park is located in Buôn Đôn District , Dak Lak Province , Tây Nguyên of Vietnam . The park was established in 1991 to protect a biological area of dipterocarp lowland forest . The vegetation at Yok Don National Park is dominated by a mosaic of deciduous forest and semi-evergreen ( mixed deciduous ) forest , with smaller areas of evergreen forest , particularly on hills and along watercourses . The canopy of this forest type is open and most trees have thick , fire-resistant bark . The topography of the site is flat , at an elevation of 200 m ( 650 ft ) with the lowland landscape dominated by dry forest studded with seasonal pools . However , there are several ranges of low hills within the national park : the highest is Mount Yok Don at 482 m ( 1580 ft ) in the southeastern range . Yok Don Park is bisected by the Srepok River — a major tributary of the Mekong River . More than one year ago , Leonid Averyanov described a new variety of Doritis pulcherrima from southern Vietnam near the border to Cambodia in Lindleyana 22 ( 2 ): 9-16 ( 2009 ). The variety differed from the typical species by the apiculated tip of the midlobe of the lip . So Averyanov named it as var . apiculata . This new variety is highly variable in the coloration . In addition to the typical form , Leonid
Averyanov described also the dark purple form as forma purpurea and the white form as forma nivea . Furthermore , Leonid Averyanov and Olaf Gruss accept the genus Doritis as a distinct and clearly defined genus . In this point they agree with Tomohisa Yukawa from Japan : if they would follow the taxonomy of Eric Christenson , the plants should be described as Phalaenopsis pulcherrima var . apiculata .
Phalaenopsis - First Quarter , Vol . 21 ( 3 ) 2012
forma typica • Doritis pulcherrima var . apiculata • forma purpurea
forma typica forma nivea forma purpurea
forma typica forma nivea forma purpurea
Olaf Gruss In der Au 48 D-83224 Grassau , Germany
15