【摘要】 描述了天南星科Araceae南星族Areae犁头尖属Typhonium Schott一新种——保山犁头尖Typhonium baoshanense Z. L. Dao & H. Li, 它的叶形和佛焰苞形态与犁头尖T. blumei Nicolson & Sivadasan相似, 但附属器下部, 雄花序之上, 有1–2轮不育雄花(退化雄蕊), 雌花序圆锥形, 附属器基部截形和佛焰苞檐部狭窄而易于区别。同域分布的犁头尖染色体数目为2n=52, 本种染色体数目为2n=10, 为天南星科的最低染色体基数。更多还原

【Abstract】 Typhonium baoshanense Z. L. Dao & H. Li (Araceae: Areae), a new species from western Yunnan, China, is described and illustrated. This species differs mainly from other species of Typhonium by the presence of one to two rings of sterile male flowers above the fertile male flowers, and from T. blumei Nicolson & Sivadasan by a conic female part of the spadix, the appendix not being truncate at its base, and by the angustate limb of the spathe. The chromosome number of Typhonium blumei, which occurs in same area, is 2n=52, while the chromosome number of the new species is 2n=10. The chromosome number of the new species is the lowest in the family Araceae.更多还原