H.obtusifolia is founded in the southern of Thailand. It is looked like H.imperalis when it is not blooming except the leaf has light green color, more ovate oblong in shape and obtuse tip. The stem is very stout. The leaf is 15 cm long by 5-6 cm wide. The flower is about 1/2 - 3/4 inch in diameter, cupped shape, 1-20 flowers per umbel and open about 3-4 days. The flower color of this plant can vary from pale yellow to orange with red spot color up to the light intensity. It blooms in July - October in the rainy season.