Heisteria silvianii
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| Heisteria silvianii | ||||||||||||
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Heisteria silvianii is a tree in the family Olacaceae from southeastern Brazil in the Mata Atlântica .
description
Heisteria silvianii grows as an evergreen tree up to about 8-15 meters high. The trunk diameter reaches 40–50 centimeters. The brownish bark is thick and longitudinally fissured with age.
The alternate and simple, slightly leathery and short-stalked, bare leaves have entire margins. The leaf margin is partly bent and they are up to 8-15 centimeters long and 3-5 centimeters wide. The thick, short petiole is 1–1.5 inches long. The leaves, which are lighter on the underside, are obovate or lanceolate to oblong. At the tip they are sometimes outlined to heart-shaped or usually pointed to pointed. The nerve is finely pinnate with a lighter central vein that is raised underneath. Stipules are missing.
The small, five-fold and stalked flowers with a double flower envelope are in axillary clusters with about 6-14 flowers. The small, about 1.5 millimeters long, overgrown calyx has small triangular tips. The fleshy, green-white, white-haired, bearded crown in the center consists of egg-shaped, up to 3 millimeters long, thick and keeled petals. There are 10 short stamens attached to the bottom of the petals with compressed and slightly twisted stamens. After fertilization, the calyx enlarges and turns red, as do the flower stalks. The above constant, half-ellipsoidal, grooved, draft tube ovary with a short, tapered and grooved stylus with a small three-part scar , sitting on a grooved disc .
Bald and whitish to yellowish, about 1.2-1.5 centimeters in size, egg-shaped to ellipsoid drupes are formed. They are persistent, large and fleshy, red and spreading to laid back, five-lobed, star-shaped calyx, about 2.5-3 centimeters in diameter. The meso- and exocarp are thin and the large, brownish, solitary stone cores are acorn-shaped.
Systematics
It was first described as Heisteria silviani ( silvani with an “i” at the end) in 1900 by Carl August Wilhelm Schwacke in Plantas Novas Mineiras 2: 3, t. 1. A synonym is Heisteria stereoneura Pierre ex Glaz.
The epithet honors Silviano Brandão (1848–1902), the then President of Minas Gerais .
Web links
- Heisteria silvianii at Useful Tropical Plants.
- Heisteria silvianii at UFRGS | Universidade Federal do Rio Grande do Sul (With some pictures).
- Heisteria silvianii at Steere Herbarium - New York Botanical Garden (description).
Individual evidence
- ↑ Heisteria silvianii at KEW Science.
- ↑ online at biodiversitylibrary.org.