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iNat·49822SpeciesPlantae13,134 field observations
  1. Plants
  2. ›Vascular Plants
  3. ›flowering plants
  4. ›Dicots
  5. ›Heathers, Balsams, Primroses, and Allies
  6. ›heath family
  7. ›typical heathers, azaleas, and allies
  8. ›Rhodoreae
  9. ›Rhododendron
  10. ›Hymenanthes
  11. ›Pentanthera
  12. ›Pentanthera
Pinxter Flower
Plate 1 of 4. (c) Ana Ka'ahanui, some rights reserved (CC BY), uploaded by Ana Ka'ahanui · via iNaturalist

Pinxter Flower

Rhododendron periclymenoides

Rhododendron periclymenoides, commonly called the pinxterbloom azalea, pinxter flower or pink azalea, is a species of shrub in the heath family Ericaceae. A North American azalea, It is native to the eastern United States, where it is widespread from Alabama to New Hampshire. It is often found in riparian areas, in wet to dry forests.

This species produces showy pink flowers in the spring. They have 2-inch (51 mm) long stamens; they carry a strong, sweet scent similar to petunias. The leaves are bright green and ovate. The trunk grows to be about 9 feet (2.7 m) tall. Like many members of the genus, the plant contains toxins in all parts of the flower.

Continue reading on Wikipedia

From the article Rhododendron periclymenoides on Wikipedia (CC BY-SA), quoted section by section

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Description

Rhododendron periclymenoides occurs throughout the Eastern United States, from southern New York south to Georgia, with isolated populations in Midwestern states. This plant prefers habitats in swamp margins, moist woods and open areas with full to partial sunlight or high, open shade. Soils in which Rhododendron periclymenoides grows best are typically acidic, rich in humus and retains moisture but should still have some drainage. Common ecosystems in which this plant can be found are oak-hickory, oak-pine- spruce-fir, maple-beech-birch and white- ed-jack pine. Common pollinators of R. periclymenoides are hummingbirds and butterflies.

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What it does

According to the United States Forest Service, wildfires typically “top kill” azaleas. After wildfires have come through an area, R. periclymeniodes can resprout from subsurface structures.

Wikipedia: “Fire ecology”

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Toxicity

Rhododendron periclymenoides has low levels of toxicity, and all parts of the plant may cause vomiting or diarrhoea if ingested in quantity. The poisons produced by rhododendrons are known as grayanotoxins, which are a class of neurotoxins. These neurotoxins work by blocking the inactivation of sodium channel receptors, causing cell dysfunction. The honey which is made by bees which collect pollen from genus Rhododendron species is referred to as “mad honey”. Humans who ingest this honey begin exhibiting many of the symptoms listed above as well as hypotension and other irregularities of cardiac rhythm. Outside of “mad honey” ingestion, human poisoning by rhododendrons is rare. However, pets and other livestock can still ingest the plant parts. While not common in the United States, “mad honey” is believed to have medicinal qualities in China.

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How it is grown

Rhododendron periclymenoides is used in horticulture as an ornamental plant. Common landscape uses for the plant are as a foundation plant? and in shrub borders. Both seeds and cuttings of the plant can be used for propagation. Since lack of proper drainage can lead to root rot, North Carolina State University advises the use of raised beds if the plant is going to be grown in soil that contains a lot of clay.

Wikipedia: “Horticulture”

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In human culture

One of the common names of R. periclymenoides is the pinxterbloom azalea. "Pinxter" is from the Dutch Pinksteren meaning Pentecost, a name used for the seventh Sunday after Easter. This is typically around the time when the flowers bloom.

Wikipedia: “Etymology”

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Where it lives

Recorded sightings

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geo-referenced records in GBIF, from museums, herbaria and field observers.

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In the stacks

Searching the stacks…

Every page naming Rhododendron periclymenoides in the Biodiversity Heritage Library →

This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 49822.