Mitrephora glabra
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==Description== |
==Description== |
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It is a tree reaching |
It is a tree reaching {{Convert|15-20|m|sp=us}} in height. Its [[twig]]s are hairless when mature. Its papery to leathery, elliptical to lance-shaped leaves are {{Convert|6.5-25 by 1.5-6.5|cm|sp=us|sigfig=2}} with wedge shaped bases and tips that taper to a point. Both sides of the leaves are hairless except for short hairs on the upper surface of the midrib. The leaves have 5-15 pairs of secondary veins emanating from their midribs that arch to form loops near the leaf margins. Its [[petiole (botany)|petioles]] are 2.5–9 by 1–2.5 millimeters and covered in sparse fine hairs. Its flowers are born opposite the leaves on [[inflorescence]]s in groups of 3 or fewer. The flowers are on fleshy, densely hairy [[pedicel (botany)|pedicels]] that are 5.5–13 by 0.5–3.5 millimeters. The pedicels have an oval, basal bract that is 1 by 1 millimeters, and another bract at their midpoint that is 1–1.5 by 1–2.5 millimeters. Its flowers have 3 triangular to oval [[sepal]]s that are 1.5–3 by 2–3.5 millimeters. The sepals are covered in dense, brown hairs on their outer surface and sparse hairs on their inner surface. Its 6 petals are arranged in two rows of 3. The yellow, elliptical to oval, outer petals are 1–2.4 by 0.6–1.2 centimeters and come to a point at their tips. The outer petals are covered in light brown hairs on both surfaces, with fewer inside. The inner petals are yellow with pink to purple highlights at their tips. The inner petals are 9–13 by 2.5–5.5 millimeters with a narrow, basal [[petal|claw]] and a rhomboidal blade. The inner petals have sparse hairs on their outer surface and dense, brown, woolly hairs on their inner surface. Its flowers have [[stamen]] that are 0.8–1.1 by 0.3–0.6 millimeters. The carpels have 10–12 [[ovule]]s. Its flowers have 15-17 [[gynoecium|carpels]] that are 1–1.5 by 0.3–0.5 millimeters. Its fruit occur in clusters of 10–15 on pedicels that are 7–23 by 1.5–4.5 millimeters and covered in sparse hairs. The smooth, oval fruit are 1.8–3.4 by 1.1–2.1 centimeters with flat tips. The fruit are attached to the pedicel by [[stipe (botany)|stipe]]s that are 1.5–4 by 1–2.4 millimeters. Each fruit has 6-8 seeds that are 6.5–23.5 by 7–20 millimeters.{{cite book |last=Scheffer |first=R.H.C.C. |date=1885 |title=Sur Quelques Plantes Nouvelles ou peu Connues de L’Archipel Indien |trans-title=On Some New or Little Known Plants of the Indian Archipelago |url= https://www.biodiversitylibrary.org/item/24941 |language=French, Latin |location=Leiden |publisher=E.J. Brill}} |
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===Reproductive biology=== |
===Reproductive biology=== |
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The pollen of ''M. |
The pollen of ''M. glabra'' is shed as permanent tetrads.{{cite journal |last=Walker |first=James W. |date=1971 |title=Pollen Morphology, Phytogeography, and Phylogeny of the Annonaceae |journal=Contributions from the Gray Herbarium of Harvard University |volume=202 |issue=202 |pages=1–130|jstor=41764703 }} It flowers and sets fruits throughout the year. |
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==Habitat and distribution== |
==Habitat and distribution== |
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It has been observed growing in lowland forests, often near rivers and streams, at elevations of 0 to 450 |
It has been observed growing in lowland forests, often near rivers and streams, at elevations of 0 to {{Convert|450|m|sp=us}}.{{cite journal |last1=Weerasooriya |first1=Aruna D. |last2=Saunders |first2=Richard M. K. |date=2010 |title=Monograph of Mitrephora (Annonaceae) |journal=Systematic Botany Monographs |volume=90 |pages=1–197 |jstor=41059228}} |
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==Uses== |
==Uses== |
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