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首页> 外文期刊>Journal of the Botanical Research Institute of Texas >FASCICULATE MORPHOLOGY, SEED VARIATION, AND DISTRIBUTIONAL NOTES IN ARCYTOPHYLLUM (RUBIACEAE)
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FASCICULATE MORPHOLOGY, SEED VARIATION, AND DISTRIBUTIONAL NOTES IN ARCYTOPHYLLUM (RUBIACEAE)

机译：菊科植物的微观形态，种子变化和分布说明

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摘要

Fasciculate morphology involving leaves and stems occurs in Arcytophyllum fasciculatum A. ericoides, A. rivetii, A. thymifolium, and Stenotis mucronota. These characters are discussed and the rarity of this kind of morphology in the Rubiaceae is emphasized and compared with non-fasciculate kinds of morphology. The most noteworthy fasciculate character in four species of Arcytophyllum is the arrangement of the leaves in tight nodal clusters. Morphological variation in several non-fasciculate and fasciculate species is described, and a possible channel of their development is suggested. A different kind of variation hosing to do with the morphology of the seed hilum occurs in certain Arcytophyllum species The seeds of Arcytophyllum fasciculatum and A. thymifolium were found to have lengthwise- raised extensions or ridges from a punctiform center hence a new term, ridged punctiform hila. Extensions in the geographic ranges of the species A fasciculatum and A. serpyllaceum are noted; the distribution of the genus Arcytophyllum is extended from South and Central America to Mexico and southwestern United States.
机译：包括叶和茎的细小形态发生在棉铃虫A. ericoides，A。rivetii，A。thymifolium和Stenotis mucronota中。讨论了这些特征，并强调了茜草科中这种形态的稀有性，并将其与非细小形态的形态进行了比较。在四种茶树中最明显的细小特征是叶片排列在紧密的节簇中。描述了几种非细小和细小物种的形态变化，并提出了它们发展的可能途径。在某些茶树属物种中发生了与种子门扇形态有关的另一种变异嗨。注意到物种A fasciculatum和A. serpyllaceum的地理范围的扩展。 Arphylphyllum属的分布从南美和中美洲扩展到墨西哥和美国西南部。

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