We studied the epiphytic species Tillandsia capillaris and T. virescens that grow as neotenic forms with autogamous and cleistogamous flowers. They have expanded in Andean mountain environments, where they grow sympatrically across most of their ranges in arid regions of Peru, central-western Bolivia and north-central Argentina and Chile. We studied the relationships between the two species and populations within each of them, the morphological boundaries and the climatic characterization of distinct genetic entities. We analysed 125 and 102 individuals from 25 and 27 populations of T. virescens and T. capillaris, respectively, by means of haplotype networks, phylogenetic and genetic structure analyses, using the plastid gene ycf1 (c. 4500 bp) to define genetic groups. Morphological studies by discriminant analyses and correlation with climatic variables extracted from WorldClim were used to test differentiations among the genetic groups within each species. We confirm that T. capillaris is a distinct entity and that T. virescens consists of three groups that diverged by vicariance from widespread ancestors. The high genetic diversity found in both species is consistent with the complex geography of the Andes and the Pleistocene glaciation cycles that have driven ecological speciation in both species reflected in the timing of divergence of the clusters.

中文翻译：

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来自安第斯山脉南部的两种同胞广泛分布的凤梨科的比较植物学，形态边界和气候覆盖

我们研究了附生种凤梨茵陈和T.夜蛾是成长为具有自花受精和闭花受精的花neotenic形式。它们在安第斯山区环境中扩展，在秘鲁，中西部玻利维亚，阿根廷中北部和智利等干旱地区的大部分范围内同伴生长。我们研究了两个物种与每个物种中的种群之间的关系，形态边界和不同遗传实体的气候特征。我们通过质体基因，通过单倍型网络，系统发育和遗传结构分析，分别分析了来自25个和27个T. virescens和T. capillaris种群的125个和102个个体ycf1（Ç。4500碱基对），以限定基因组。通过判别分析进行形态学研究，并与从WorldClim提取的气候变量相关联，以测试每个物种内遗传群体之间的差异。我们确认，T.茵陈是一个独立的实体和T.夜蛾由该分歧的隔离分化从普遍的祖先三组。在这两个物种中发现的高度遗传多样性与安第斯山脉复杂的地理环境和更新世的冰川形成周期相一致，这驱动了两个物种的生态物种形成，这反映在集群的发散时间上。