Pollen morphology of six native and two sub-spontaneous species of Cucurbitaceae found in the state of Goiás, Midwest Region of Brazil were analyzed to understand the palynology and taxonomy of the selected species. Pollen grains were acetolyzed, measured, described, photographed and electromicrographed. SEM was used to analyze exine ornamentation. Pollen grains are monads in Cayaponia podantha Cogn., Ceratosanthes tomentosa Cogn., Luffa operculata (L.) Cogn., Melothria campestris (Naudin) H. Schaefer and S. S. Renner, Momordica charantia L., Wilbrandia hibiscoides Silva Manso or tetrads in Gurania lobata (L.) Pruski and Psiguria umbrosa (Kunth) C. Jeffrey; average size, large or very large in monads and tetrads. The openings ranged from pores in Cayaponia podantha, colpores in other monads and pores in tetrads. Regarding ornamentation, Cayaponia podantha has spiny sexine, Melothria campestris perforated sexine, Gurania lobata and Psiguria umbrosa micro-reticulated sexine, and other taxa have reticulated sexine. Cayaponia podantha and Psiguria umbrosa were first described in this study. Results allowed the distinction between genera, indicating that the pollen morphology contributes to the taxonomic studies and the family is considered eurypalynous. This study provides information that, with other previously published studies, will allow a better understanding of the phylogenetic relationships between these species.

分析了在巴西中西部地区Goiás州发现的6个原生葫芦科和2个自发亚种的花粉形态，以了解所选物种的孢粉学和分类学。花粉粒被乙酰化，测量，描述，照相和电子显微照相。SEM被用于分析外在的装饰。花粉粒是Cayaponia podantha Cogn。，Ceratosanthes tomentosa Cogn 。，Luffa operculata（L.）Cogn 。，Melothria campestris（Naudin）H.Schaefer和SS Renner ，Morordica charantia L.，Wilbrandia hibiscoides Silva Manso或Monadata中的四生种。（L.）Pruski和Psiguria umbrosa（昆斯）C。杰弗里；平均大小，以单子或四联体为大或非常大。开口的范围从Cayaponia podantha的毛孔，其他单子的孢子和tetrads的毛孔不等。在装饰方面，Cayaponia podantha具有多刺的丝氨酸，Melothria campestris穿孔的丝氨酸，Gurania lobata和Psiguria umbrosa微网状的丝氨酸，而其他类群具有网状的丝氨酸。Cayaponia podantha和Psiguria umbrosa首先在这项研究中描述。结果可以区分属，表明花粉形态有助于分类学研究，并且该科被认为是雌性。这项研究提供的信息可以与其他先前发表的研究一起，使人们更好地了解这些物种之间的系统发育关系。