Rafflesia verrucosa

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Rafflesia verrucosa
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Rafflesiaceae
Genus: Rafflesia
Species:
R. verrucosa
Binomial name
Rafflesia verrucosa
Rafflesia verrucosa map.png
Rafflesia verrucosa distribution

Rafflesia verrucosa was first identified and characterized during a small mammal survey of Mt. Kampalili in eastern Mindanao in 2010. [2] R. verrucosa is the tenth species of Rafflesia found in the Philippines. [2] Rafflesia species have rare and unusual flowers known for their large size and pungent smell. Some plant enthusiasts like Frits W. Went have gone to extreme measures to see these plants in bloom. Went detailed his search for Rafflesia saying,

Contents

"I had heard, when I was in Java many years ago, that Rafflesia were to be found on an offshore island named Nusah Kembangan. This was in 1929, when it was a penal colony for major criminals. My driver on this occasion was a convicted murderer, and my guide was serving time for cannibalism." [3]

The small size and interesting morphology of Rafflesia verrucosa make it one of the most unusual Rafflesia species. It is the smallest flowered Rafflesia species described from Mindanao. [2] The other two, R. mira and R. schadenbergiana , are some of the largest in the genus. [2]

Etymology

The epithet verrucosa comes from the Latin word verruca, which means wart. [2] This name was given due to the unique, raised warts on the lobes and diaphragm of the plant.

Description

Rafflesia verrucosa has very distinctive raised warts on its perigone lobes and diaphragm. [2] The warts are non-uniform in shape or size. [2] The warts extend to the diaphragm rim of the plant; this characteristic is unique to R. verrucosa, while all other Rafflesia species lack warts on their diaphragms. [2] Another unique characteristic of R. verrucosa is the anastomosing plate-like processes on the plants disk. [2] The hair like ramenta are longer (7 mm) when compared to other small Rafflesia. [2] Compared to other smaller-sized Rafflesia, the anther number of R. verrucosa is much greater (20-21). [2] The anthers size and disk size are also both small. [2]

One unique morphological feature of R. verrucosa is its monoecious or bisexual nature. [2] The only other reported bisexual species in this genus is Rafflesia baletei . [2] R. baletei has male and female flowers that contain vestigial structures of the opposite sex. [4] Further studies will be needed to conclude if the species is a functional bisexual. [2]

Distribution and habitat

Rafflesia verrucosa has been found only growing on the southeastern slope of Mt. Kampalili in the Davao Oriental Province of Mindanao. [2] The plant can be found between 1350 and 1550 m. in elevation even though the Tetrastigma vines that the plant grow on can be found at a greater range of elevations. [2]

The R. verrucosa specimens were found in a montane forest, which had a relatively rocky, sloping terrain. [2] Leaf litter depth at the site was ca. 2–5 cm. deep, and canopy height was about 15 m tall. [2] Mosses were common on tree trunks and branches around the flowers. [2] Understory vegetation in montane forests is dense, and is composed of ferns, lycophytes, ground orchids, gingers and grasses. [2] Canopy vines are very common in these sorts of areas. [2]

Ecology

Rafflesia verrucosa was found growing on only the roots of the Tetrastigma vines. Some buds were found growing from roots that were 7 cm. under soil. [2] In the area it was found, the spatial density of R. verrucosa was around 7-8 flower clusters per hectare. [2] The peak flowering season is likely through October to December, but flowering might persist intermittently year round. [2] The reproductive style of R. verrucosa is probably similar to other Rafflesia species.

The impact of various mammals on the herbivory and dispersal is unknown. [2] Trapping around verrucosa flower clusters revealed several small mammal species including gymnures, shrews, tree shrews, shrew-mice, moss mice, tree mice, forest mice, the large Mindanao forest rat and a Philippine forest rat. [2] Larger mammals have also been seen in the surrounding area. [2] The Philippine warty pig was seen trampling some of the R. verrucosa flowers, but they were not seen eating the fruits. In Borneo smaller mammals such as squirrels and the tree shrew eat Rafflesia fruits. [2]

Conservation

The montane forest in which R. verrucosa is found, has become increasingly disturbed and fragmented by the abaca textile industry. [2] Another threat to R. verrucosa habitat is the practice of cutting down rattan palms for their heart of palm. This processes destroys vast areas of forest. [2] Up until now, Mt. Kampalili has been relatively undisturbed by these impacts. [2] R. verrucosa populations can continue to be stable if portions of Mt. Kampalili remain unchanged. [2]

Related Research Articles

<i>Rafflesia</i> Genus of flowering plants

Rafflesia, or stinking corpse lily, is a genus of parasitic flowering plants in the family Rafflesiaceae. The species have enormous flowers, the buds rising from the ground or directly from the lower stems of their host plants; one species has the largest flower in the world. Plants of the World Online lists up to 41 species from this genus, all of them are found throughout Southeast Asia.

<i>Rafflesia arnoldii</i> Species of flowering plant

Rafflesia arnoldii, the corpse flower, or giant padma, is a species of flowering plant in the parasitic genus Rafflesia. It is noted for producing the largest individual flower on Earth. It has a strong and unpleasant odor of decaying flesh. It is native to the rainforests of Sumatra and Borneo. Although there are some plants with larger flowering organs like the titan arum and talipot palm, those are technically clusters of many flowers.

<span class="mw-page-title-main">Rafflesiaceae</span> Family of flowering plants

The Rafflesiaceae are a family of rare parasitic plants comprising 36 species in 3 genera found in the tropical forests of east and southeast Asia, including Rafflesia arnoldii, which has the largest flowers of all plants. The plants are endoparasites of vines in the genus Tetrastigma (Vitaceae) and lack stems, leaves, roots, and any photosynthetic tissue. They rely entirely on their host plants for both water and nutrients, and only then emerge as flowers from the roots or lower stems of the host plants.

<i>Sapria</i> Genus of flowering plants

Sapria is a genus of parasitic flowering plants in the family Rafflesiaceae. It grows within roots of Vitis and Tetrastigma. The genus is limited to the tropical forests of South and Southeast Asia.

<span class="mw-page-title-main">Pieter B. Pelser</span> New Zealand botanist

Pieter B. Pelser is a lecturer in Plant Systematics and the curator of the herbarium at the University of Canterbury in Christchurch, New Zealand. One research interest is the evolutionary history of the tribe Senecioneae, one of the largest tribes in the largest family of flowering plants. He wrote the most recent attempt to define and delimit this tribe and its problematic founding species Senecio. He also studies insects that eat these plants (Longitarsus) which contain pyrrolizidine alkaloids and what makes them choose which plants they eat.

<i>Rafflesia tuan-mudae</i> Species of flowering plant

Rafflesia tuan-mudae is a member of the Rafflesiaceae family. It lives as a parasite within the Tetrastigma vines. The enormous flowers may reach over 1 m in diameter. The buds normally emerge where the vine is growing along the ground, unlike some of the other Rafflesia species whose buds can emerge from vines hanging in the air.

Rafflesia philippensis is a parasitic plant species of the Rafflesiaceae family that was named by Francisco Manuel Blanco in his Flora de Filipinas in 1845. The species is known only from a mountain located between the provinces of Laguna and Quezon, Luzon where it was first discovered. Its plant host is Tetrastigma pisicarpum. This species went unnoticed since its first description by Blanco but was rediscovered in 2003 by members of the Tanggol Kalikasan, a local environment conservation group in Quezon province who first saw and photographed the open flower of this species. It was brought to the attention of Manuel S. Enverga University (MSEUF), who formed a team composed of students and faculty to document the newly discovered Rafflesia species.

<i>Rafflesia schadenbergiana</i> Species of flowering plant

Rafflesia schadenbergiana is a parasitic plant species of the genus Rafflesia. Known as "bó-o" to the Bagobo tribe and "kolon busaw" to the Higaonon tribe of Bukidnon, it has the largest flower among the Rafflesia species found in the Philippines with a diameter ranging from 52 to 80 centimeters. It has also the second largest flower in the genus after R. arnoldii.

Rafflesia patma is a parasitic plant species of the genus Rafflesia. It is only known to grow on the Indonesian island of Java, although it may have occurred on Sumatra in the past. Like other species in its genus, this plant has no leaves, stems, roots or chlorophyll, instead stealing all its nutrition from Tetrastigma lanceolaurium, a rainforest liana.

<i>Rafflesia zollingeriana</i> Species of flowering plant

Rafflesia zollingeriana is a species of flowering plant in the family Rafflesiaceae, native to Java. Of three species of Rafflesia known from Java this species has always been the most rare and restricted, it is only known from collection locales in Banyuwangi Regency, Jember Regency and Lumajang Regency, southern East Java. It was first scientifically collected in 1902 by Sijfert Hendrik Koorders on the eastern flanks of Mount Puger Watangan, a forested hill near the beach, who described it as a new species in 1918. Many decades later a flowering plant was discovered in Meru Betiri National Park, also in the Jember Regency somewhat further down the coast to the east.

<i>Rhizanthes</i> Genus of flowering plants

Rhizanthes is a genus of four species of parasitic flowering plants in the family Rafflesiaceae. They are without leaves, stems, roots, or photosynthetic tissue, and grow within the roots of a few species of Tetrastigma vines. The genus is limited to the tropical forests of Southeast Asia. The flowers of Rhizanthes are very large, they vary from 14 to 43 cm in diameter. At least one species of Rhizanthes, Rh. lowii, is endothermic.

Rhizanthes zippelii is a species of parasitic flowering plant without leaves, stems, roots, or photosynthetic tissue. Its flowers bud out of the roots of the Tetrastigma vine. It is found in the tropical rainforests of Java. The flowers are reddish-brown, with long hanging tips, and are from 12 to 29 cm across.

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<i>Rafflesia consueloae</i> Species of flowering plant

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<i>Tetrastigma leucostaphylum</i> Species of vine

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<span class="mw-page-title-main">Daniel Lee Nickrent</span> American botanist

Daniel Lee Nickrent is an American botanist, working in plant evolutionary biology, including the subdisciplines of genomics, phylogenetics, systematics, population genetics, and taxonomy. A major focus has been parasitic flowering plants, particularly of the sandalwood order (Santalales). His interest in photographic documentation and photographic databases has led to several photographic databases including Parasitic Plant Connection, Phytoimages, Plant Checklist for the Rocky Mountain National Park, and Plant Checklist for the Crab Orchard National Wildlife Refuge.

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Rafflesia meijeri is a species of parasitic flowering plant in the genus Rafflesia. It was first described by Harry Wiriadinata and Rismita Sari in 2010. It is known from a single location, Sicikeh-Cikeh, a nature park in North Sumatra.

Rafflesia lawangensis is a species of parasitic plant in the genus Rafflesia. It is exclusively found in Bukit Lawang, a small tourist village in Mount Leuser National Park, North Sumatra, Indonesia. Previously misidentified as Rafflesia arnoldii, photographs taken in 2005 led to the eventual separation of Rafflesia lawangensis as a distinct species in 2010.

References

  1. Govaerts, R. et al. (2019) Plants of the world online: Rafflesia verrucosa. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved July 2019.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Balete, Danilo; Pelser, Pieter; Nickrent, Daniel; Barcelona, Julie (2010). "Rafflesia verrucosa (Rafflesiaceae), a new species of small-flowered Rafflesia from eastern Mindanao, Philippines" (PDF). Phytotaxa. 10: 49–57. doi:10.11646/phytotaxa.10.1.8 . Retrieved November 10, 2014.
  3. Went, Frits (1963). The Plants. New York: Stonehenge Book. p. 144.
  4. Barcelona, Julie; Cajano, Mary Ann; Hadsall, Annalee (November 30, 2014). "Rafflesia baletei, another new Rafflesia (Rafflesiaceae) from the Philippines". Royal Botanic Gardens. 61 (2).