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121 Chayan Picheansoonthon and Pornpimol Wongsuwan «“√ “√ √“™∫— ≥±‘ µ¬ ∂“π ªï ∑’Ë ÛÛ ©∫— ∫∑’Ë Û °.§.-°.¬. ÚııÒ Figures. 1 & 2 H. aureum , 3 H. biflorum , 4 & 5 H. coccineum , 6 H. coronarium var. coronarium , 7 H. coronarium var. chrysoleucum , 8 H. ellipticum , and 9 H. flavescens [photographed by Chayan Picheansoonthon (Figs. 1-5, 7-9) and Pornpimon Wongsuwan (Fig. 6)] 1 2 3 4 5 6 7 8 9