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Revision of Passiflora Subgenus Decaloba ... - Passion Flowers

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369<br />

2.1 mm thick, acute at both ends, reticulate-foveate with each face marked with<br />

ca. 22-26 foveae. Fig. 8.29-8.30.<br />

Distribution and Ecology<br />

México, in the state <strong>of</strong> Chiapas. Bosque mesófilo de moñtana, 1700-2700 m<br />

altitude. Flowering and fruiting May.<br />

Additional Specimen Examined<br />

Known only from type specimen.<br />

Notes<br />

<strong>Passiflora</strong> tacana is known only from the locality and though Martínez<br />

(Martínez 20782) states that the flowers are purple, the specimen does not<br />

possess flowers and I have not been able to locate any duplicates. It was found<br />

in montane mesophytic forests on Volcán Tacaná in southwestern México and<br />

was collected in May during the rainy season.<br />

<strong>Passiflora</strong> tacana is very similar to P. eglandulosa, which grows on the<br />

adjacent Volcán Santa María <strong>of</strong> Guatemala. The mature leaves <strong>of</strong> P. tacana<br />

greatly resemble the juvenile leaves <strong>of</strong> P. eglandulosa and are trilobed, with the<br />

middle lobe greatly reduced and widely obtuse to truncate. The laminas are also<br />

cordate and eglandular, and both <strong>of</strong> these species possess wide foliose stipules.<br />

However, P. tacana possesses petiolar glands positioned near the middle <strong>of</strong> the<br />

petiole, whereas P. eglandulosa does not possess petiolar glands. In addition,

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