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Anthurium bromelicola and A. sterilispadix (Araceae): two distinct bromeliad commensals with highly unusual inflorescence morphology endemic to Northeast Brazil
Plant Systematics and Evolution ( IF 1.5 ) Pub Date : 2021-01-11 , DOI: 10.1007/s00606-020-01722-3
Karena M. Pimenta , Simon Mayo , Lívia G. Temponi , André Mantovani , André M. Amorim

Anthurium sterilispadix (previously A. bromelicola subsp. bahiense ) is recognized as a new species, closely related to A. bromelicola and representing a third species of Araceae exhibiting commensalism with Bromeliaceae. The two species share the same highly unusual slender twining habit but differ markedly in inflorescence morphology, each exhibiting characteristics unique in the genus and suggesting divergent pollination biology. In A. sterilispadix , the spathe spreads widely without differentiation into tube and lamina, the lamina is smooth and pink adaxially showing colour changes according to the stage of anthesis and the greater part of the narrowly tapering pale yellow spadix consists of modified sterile flowers which appear to be osmophoric. In A. bromelicola the spathe has tube-blade dimorphism, is adaxially deep purple and conspicuously ribbed, the spadix is relatively stout and the flowers have black-purple tepals and are all fertile. Anatomical study of leaves and inflorescences of both species revealed unusual features for the genus, such as the presence of vascularized ribs in the A. bromelicola spathe, and sterile osmophoric regions in the A. sterilispadix spadix; these novel characters are documented and discussed for the first time here. Nomenclature, taxonomic descriptions, images, geographical and ecological notes and an identification key are presented. Both species are endemic to the Brazilian Atlantic Forest region and are estimated to be endangered.

中文翻译:

Anthurium bromelicola 和 A. sterilispadix(天南星科):两种不同的凤梨科共生植物,具有巴西东北部特有的非常不寻常的花序形态

Anthurium sterilispadix(原 A. bromelicola subsp. bahiense)被认为是一个新物种,与 A. bromelicola 密切相关,代表了与凤梨科共生的天南星科第三种。这两个物种具有相同的极不寻常的细长缠绕习性,但在花序形态上有显着差异,每个物种都表现出该属中独特的特征并表明不同的授粉生物学。在 A. sterilispadix 中,佛焰苞广泛蔓延而没有分化为筒管和叶片,叶片光滑且正面呈粉红色,根据花期的不同呈现颜色变化,窄渐细的淡黄色花苞的大部分由出现的改良不育花组成。渗透压。在 A. bromelicola 中,佛焰苞具有管状叶片二形性,正面深紫色,有明显的棱纹,穗轴比较粗壮,花有黑紫色的花被片,都可以生育。对这两个物种的叶子和花序的解剖学研究揭示了该属的不同寻常的特征,例如在 A. bromelicola 佛焰苞中存在带血管的肋骨,以及在 A. sterilispadix spadix 中存在无菌渗透区;这些新颖的角色在这里首次被记录和讨论。提供了命名法、分类学描述、图像、地理和生态注释以及识别码。这两种物种都是巴西大西洋森林地区的特有物种,估计已濒临灭绝。对这两个物种的叶子和花序的解剖学研究揭示了该属的不同寻常的特征,例如在 A. bromelicola 佛焰苞中存在带血管的肋骨,以及在 A. sterilispadix spadix 中存在无菌渗透区;这些新颖的角色在这里首次被记录和讨论。提供了命名法、分类学描述、图像、地理和生态注释以及识别码。这两种物种都是巴西大西洋森林地区的特有物种,估计已濒临灭绝。对这两个物种的叶子和花序的解剖学研究揭示了该属的不同寻常的特征,例如在 A. bromelicola 佛焰苞中存在带血管的肋骨,以及在 A. sterilispadix spadix 中存在无菌渗透区;这些新颖的角色在这里首次被记录和讨论。提供了命名法、分类学描述、图像、地理和生态注释以及识别码。这两种物种都是巴西大西洋森林地区的特有物种,估计已濒临灭绝。提供了地理和生态注释以及识别密钥。这两种物种都是巴西大西洋森林地区的特有物种,估计已濒临灭绝。提供了地理和生态注释以及识别密钥。这两种物种都是巴西大西洋森林地区的特有物种,估计已濒临灭绝。
更新日期:2021-01-11
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