Zenobia pulverulenta
| Zenobia pulverulenta | ||||||||||||
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Zenobia pulverulenta |
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Zenobia | ||||||||||||
| D. Don | ||||||||||||
| Scientific name of the species | ||||||||||||
| Zenobia pulverulenta | ||||||||||||
| ( Bartram ex Willd. ) Pollard |
Zenobia pulverulenta is the only species of the Zenobia plant genuswithin the heather family(Ericaceae). It occurs in the coastal plains in the southeastern United States in the states of North Carolina , South Carolina and Virginia and is called there in English honeycup .
description
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Vegetative characteristics
Zenobia pulverulenta is a deciduous or semi- evergreen shrub that reaches heights of 1 to 2 meters. Many rhizomes are formed. The above-ground parts of the plant are bare and often blue-green. The trunks are upright. The bark of the branches is bare.
The alternate and spirally arranged leaves on the branch are divided into a petiole and a leaf blade. The petiole is 3 to 6 millimeters long. The leathery, simple leaf blade is elliptical to elliptical-ovoid or ovate with a wedge-shaped to rounded base with a length of 2 to 8, rarely up to 10 centimeters and a width of rarely 0.5 to, usually 1.2 to 4.5 centimeters and pointed, pointed, rounded or edged upper end. The even leaf margin is irregular and weakly serrated-notched or smooth. The leaf surfaces are finely hairy and balding. The leaf nerve is reticulated or looped.
Generative characteristics
The flowering time in the USA is in spring. The flowers stand individually on an unleaved branch or in pairs to usually five to twelve in a lateral, racemose inflorescence, which consists of umbrella-racemous partial inflorescences each with two to usually five to twelve flowers. There are no cover sheets .
The sweet-smelling and hermaphrodite flowers are radial symmetry and five-fold with a double flower envelope . The five free sepals are ovate to ovate-triangular. The five white petals are broadly bell-shaped up to about 3/4 of their length. The corolla has a length of 6.5 to 10 millimeters and a diameter of about 10 millimeters. The corolla lobes are much shorter than the corolla tube. The nectar disc is ten-lobed. There are two circles with five stamens each that do not protrude above the corolla. The bare stamens are straight and flattened and have no spur. The anthers have four appendages and open with elongated pores. Five carpels have grown together to form a five- chamber ovary that is clearly five-lobed. The stamp ends in a trimmed scar .
The upright, dry, five-chambered capsule fruit is 3.2 to 5 millimeters in length and 4.8 to 6.5 millimeters in diameter, flattened, spherical and opens with five fruit valves and contains 40 to 200 seeds. The wingless seeds are about 1 millimeter long and about 0.5 millimeters in diameter. The egg-shaped seeds have a smooth seed coat (testa).
The basic chromosome number is x = 11 and chromosome numbers of 2n = about 66 were detected.
Occurrence
Zenobia pulverulenta occurs in the southeastern US states of eastern North Carolina , South Carolina and eastern Virginia and Georgia .
Zenobia pulverulenta thrives in moist, sandy or peaty pine savannas , shrubby swamps, natural ponds and on the edges of swamps at altitudes of 0 to 100 meters.
Systematics
It was first published in 1799 under the name ( Basionym ) Andromeda pulverulenta W.Bartram ex Willd. by John Bartram in Carl Ludwig von Willdenow : Species Plantarum. Editio quarta , 2, 1, page 610. The new combination to Zenobia pulverulenta (W.Bartram ex Willd.) Pollard was published in 1895 by Charles Louis Pollard in Bulletin of the Torrey Botanical Club. Published New York , Volume 22, page 232. Other synonyms for Zenobia pulverulenta (W. Bartram ex Willd.) Pollard are: Andromeda cassinefolia Vent. , Andromeda speciosa Michx. , Zenobia cassinefolia (Vent.) Pollard , Zenobia speciosa (Michx.) D. Don , Zenobia pulverulenta var. Nuda (Vent.) Rehder .
Zenobia pulverulenta is the only species of the genus Zenobia D. Don from the tribe Andromedeae in the subfamily Vaccinioideae within the family Ericaceae .
The genus Zenobia was published by David Don in A New Arrangement of the Ericaceae in 1834 ; In this publication, Don has separated some species from the species-rich genus Andromeda L. into some new genera. Thereafter, Zenobia was considered a subgenus of Andromeda . In 1895 it was regained genus status by Charles Louis Pollard in Bulletin of the Torrey Botanical Club , Volume 22, Issue 5, page 232.
Individual evidence
- ↑ a b c d e f g h i j k l Laurence J. Dorr: Zenobia D. Don : In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico , Volume 8 - Paeoniaceae to Ericaceae , Oxford University Press, New York and Oxford, 2009, ISBN 978-0-19-534026-6 . Zenobia pulverulenta (Bartram ex Willdenow) Pollard , p. 506 - the same text online as the printed work .
- ↑ Zenobia pulverulenta - Honeycup . In: Discover Life . Retrieved June 26, 2016.
- ↑ Gaylussacia baccata, 2014 county distribution map . Biota of North America Program. Retrieved June 26, 2019.
- ^ A b c Charles Louis Pollard: Zenobia pulverulenta (Willd.) . In: Bulletin of the Torrey Botanical Club . 22, No. 5, 1895, p. 232.
- ↑ a b c d Zenobia pulverulenta in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved December 22, 2019.
- ↑ a b Zenobia pulverulenta at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved December 22, 2019.
