琉球蟛蜞菊

Leaves ovate, 6-12×3-8 cm, thick, petiole 1.5-3.6 cm long, base somewhat truncate. Heads 2.5-3 cm across; peduncle thick, 4-8 cm long; ray florets 14 or 15; disc florets 45-70 per head.

TAIPEI: Pitouchaio, Leu 914.

Japan, Kyushu and the Ryukyus. Taiwan, seaside in the north.

Wedelia biflora var. ryukyuensis differs from the typical variety in having larger heads with more ray and disc florets and larger leaf blade with a longer petiole. While W. biflora var. biflora is a diploid with 2n = 30, Koyama (1995) reported that W. biflora var. ryukyuensis is a triploid with 2n = 45 in Japan.