Arctostaphylos catalinae

Arctostaphylos catalinae
	Arctostaphylos catalinae
Systematics
Class :	Bedecktsamer (Magnoliopsida)
	Asterids
Order :	Heather-like (Ericales)
Family :	Heather family (Ericaceae)
Genre :	Bearberry ( Arctostaphylos )
Type :	Arctostaphylos catalinae
Scientific name
	Arctostaphylos catalinae
	PVWells

Arctostaphylos catalinae is a species of bearberry ( Arctostaphylos ) within the heather family(Ericaceae). This rare endemic only comes on to California belonging island Santa Catalina Iceland before and is there english Santa Catalina Iceland manzanita called.

description

Branch with leaves and inflorescences

fruit

Vegetative characteristics

Arctostaphylos catalinae grows as an evergreen shrub or tree , with heights of 2 to 5 meters. The branches are prostrate or independently upright. The bark of the branches is densely hairy with long white glandular hairs ( indument ).

The overlapping leaves , arranged alternately on the branches, are divided into a petiole and a leaf blade. The petiole is 2 to 6 millimeters long. The simple, leathery leaf blade is 2 to 5 centimeters long and 1.5 to 3 centimeters wide and lanceolate-egg-shaped to elliptical with a truncated to slightly lobed base. The flat edge of the leaf is completely sawn up to ±. The blue-green, dull leaf surface is rough, papilose and hairy with stiff glands.

Generative characteristics

The flowering time in the home area extends from winter to early spring, from December to February. In terminal, branched, paniculate inflorescences , nodding from the anthesis , the nodding flowers stand together at four to ten spread out branches. The inflorescence axis, densely haired with long white glandular hairs, has a diameter of a little more than 1 millimeter and is 2 to 3 centimeters long. The green, sparsely hairy, durable, overlapping bracts are 6 to 10, rarely up to 15 millimeters in length, leaf-like and lanceolate to narrowly ovate with a pointed upper end. The bracts are much shorter than the sepals. There are no cover sheets . The densely white hairy pedicel is 2 to 5 millimeters long.

The hermaphroditic flowers are radial symmetry and five-fold with a double flower envelope . The five free sepals are durable. The five white petals are fused almost over their entire length to form a conical to urn-shaped, early-dropping corolla that ends in five short corolla lobes. An intrastaminal nectar disc is present. There are two circles, each with five free, fertile stamens that do not protrude above the corolla. The free stamens are widened. Each dark red dust bag has two thread-like appendages in the upper area and opens with a pore at the upper end. The upper ovary is dense white and sparsely hairy glandular. The straight stylus ends in a cephalic scar .

The sparsely hairy drupes are spherical with a length of 8 to 15 millimeters. The exocarp is leathery or rarely thin and smooth. The endocarp contains several seeds. The stone cores of this species do not hang together at maturity.

The number of chromosomes is 2n = 26.

Occurrence and endangerment

Arctostaphylos catalinae is a rare endemic and only comes on to California belonging island Santa Catalina Iceland before. It thrives in the chaparral and open woodlands at altitudes from 0 to 500 meters.

In the IUCN's Red List of Endangered Species , Arctostaphylos catalinae was rated as “Vulnerable” in 1998. Further monitoring is required and precise information is missing.

Taxonomy

The first description of Arctostaphylos catalinae was in 1968 by Philip Vincent Wells in Madroño , Volume 19, Issue 6, pages 193-195. The type material was deposited with the number PV Wells 6867 in the UC University Berkeley Herbarium = UC.

swell

literature

V. Thomas Parker, Michael C. Vasey, Jon E. Keeley: Arctostaphylos. : Arctostaphylos catalinae PV Wells , p. 427 - the same text online as the printed work , 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 .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o V. Thomas Parker, Michael C. Vasey, Jon E. Keeley: Arctostaphylos. : Arctostaphylos catalinae PV Wells , p. 414 - the same text online as the printed work , 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 .
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j V. Thomas Parker, Michael C. Vasey, Jon E. Keeley: Arctostaphylos catalinae PV Wells at Jepson eFlora .
↑ Arctostaphylos catalinae in the Red List of Threatened Species of the IUCN 2019.1. Listed by: World Conservation Monitoring Center, 1998. Retrieved June 26, 2019.
↑ ^a ^b Arctostaphylos catalinae at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved June 25, 2019.

Web links

Commons : Arctostaphylos catalinae - Collection of images, videos and audio files

Vascular Plants of the Americas: Arctostaphylos catalinae at Tropicos.org. In: 83 . Missouri Botanical Garden, St. Louis

[FoNA-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o V. Thomas Parker, Michael C. Vasey, Jon E. Keeley: Arctostaphylos. : Arctostaphylos catalinae PV Wells , p. 414 - the same text online as the printed work , 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 .

[JepsonEflora-2] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j V. Thomas Parker, Michael C. Vasey, Jon E. Keeley: Arctostaphylos catalinae PV Wells at Jepson eFlora .

[IUCN-3] Arctostaphylos catalinae in the Red List of Threatened Species of the IUCN 2019.1. Listed by: World Conservation Monitoring Center, 1998. Retrieved June 26, 2019.

[Tropicos-4] Arctostaphylos catalinae at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved June 25, 2019.