Wood Anatomy of Argophyllaceae (Asterales): Adaptation in a Small Clade

نویسندگان

چکیده

Argophyllaceae (Argophyllum, 14 spp.; Corokia, 6 Lautea, 1 sp.), are shrubs that occur in the southwestern Pacific and eastern Australia. They habitats where moisture is relatively common but dry days mild frost may occur. The woods of these genera show enough distinctive features to justify their grouping a single family: perforation plates with 10–20 bars, vessel elements narrow numerous per mm2, imperforate tracheary about 50% longer than elements, axial parenchyma scarce, diffuse, multiseriate rays heterocellular (upright cells uniseriate rays), crystals absent, gum deposits common. These group more closely each other nearest families Asterales (Alseuosmiaceae, Phellinaceae). Probable apomorphies include helical thickenings vessels tracheids, together abundant tracheids rare septate fiber-tracheids (Corokia); almost total absence combined maximal abundance no Lautea). formerly included within has floral foliar distinctions endemic island, Rapa Iti. Woods alike ecological adaptations (perforation plates, diameter density) presence Corokia suggest drought. As expected, prominently tracheid-free species Lautea) very little tracheid-rich genus Corokia.

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ژورنال

عنوان ژورنال: Aliso

سال: 2021

ISSN: ['2327-2929', '0065-6275']

DOI: https://doi.org/10.5642/aliso.20213801.04