Wedelia biflora var. ryukyuensis

琉球蟛蜞菊

Wedelia biflora (L.) DC. var. ryukyuensis H. Koyama

名彙資訊

特徵描述

典藏標本

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分布位置

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H. Koyama, Acta phytotaxonomica et geobotanica eng 33: 245. 1982. (Acta Phytotax. Geobot., 植物分類,地理)

無

無

shrub

Subshrubs.
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.
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.