珍稀油料树种琴叶风吹楠果实和种子形态变异

以云南野生琴叶风吹楠(Horsfieldia pandurifolia)为材料，对39株树的果实和种子的形态进行变异分析。结果表明，果实和种子形态指标株间变异大，株内变异小。单株间果实表现出从卵圆形至长椭圆形的变异，果长4~7 cm，先端圆钝至锐尖，基部不同程度偏斜，与文献记录差异较大；单株间种子形态表现出从卵形、长卵形至细长形或近锥形的变异。单株平均种长变幅为25.05~35.66 mm，种宽为13.30~19.62 mm，长宽比为1.47~2.32，单因素方差分析表明此3个性状单株间差异极显著(p<0.01)。灰白色种皮具褐色斑块，种脐和胚位于种子基部，种子先端突尖或具短喙是稳定的性状，有重要的分类学价值。

Morphological Variations of Fruits and Seeds in Rare Oil Tree Horsfieldia pandurifolia Hu

Horsfieldia pandurifolia Hu is native to tropical rain forest in Yunnan, China. The morphological variations of fruits and seeds among 39 wild individuals were investigated. The results showed that differences of fruits and seeds between individuals were larger than within individual. The ripe fruits were ovoid to long-elliptical in shape, 4-7 cm in length, apex obtuse to acute, pedicel deflective, which were obviously different from the record in the original literature. The ripe seeds varied from ovoid to long-ovoid, sometimes slim or subulate in shape. The seed length, diameter and ratio of length to diameter were significantly different among 39 individuals (p<0.01), variation ranges were 25.05-35.66 mm, 13.30-19.62 mm, 1.47-2.32, respectively. The seed characteristics, including gray testa with brown speckles, hilum and embryo at base, apex acute or shortly beaked, were stable, which were important characteristics differing from other endemic species within genus Horsfieldia.