Musėkautas

Vabzdžiaėdžiai augalai ir jų aplinka – Carnivorous plants and their habitats

LT.

Growing on Sibuyan Island at the heart of the Philippine archipelago, two of the most spectacular and interesting of all pitcher plants can be found – Nepenthes sibuyanensis and N. argentii. N. sibuyanensis is a large pitchered species that is closely related to the widely cultivated Nepenethes ventricosa whereas N. argentii is one of the smallest species of the entire genus. Formally described in 1998, Nepenthes sibuyanensis was named after the island where it endemically occurs and it represents one of the least documented and least studied of all species of pitcher plants.

Nepenthes sibuyanensis growing on the summit of Mount Guiting-Guiting on Sibiuyan Island, Philippines

Nepenthes sibuyanensis growing on the summit of Mount Guiting-Guiting on Sibiuyan Island, Philippines

Nepenthes sibuyanensis has only been observed and studied a few times in its natural habitat owing to the remoteness and inaccessibility of mountains on which it grows. It is found only on the summits of Mount Guiting-Guiting and Mount Mayo on Sibuyan Island. Mount Mayo can be reached only by ascending a narrow and precipitous knife edge ridge which, in places, is just a few meters wide. On both sides of the ridge, there is a vertical drop of several hundred meters, so relatively few tourists and botanists have visited the habitat where this plant grows. Skaityti toliau…

LT.

In 1658, the first pitcher plant of the genus Nepenthes was described on the island of Madagascar by the French naturalist and explorer Etienne de Flacourt. Over the 350 years since that discovery, a further 120 species of pitcher plants have been discovered across South East Asia, and today, it is clear that the Nepenthes are largest and most diverse genus of all carnivorous pitcher plants of the world. Recently two spectacular new species of Nepenthes were discovered in Sumatra, Indonesia and in March, 2007 I traveled to this spectacular island in the company of two friends Alfindra Primaldhi and Apriza Suska in an attempt to find and study these two newly discovered plants in their natural habitats.

The spectacular pitchers of Nepenthes jacquilineae

The spectacular pitchers of Nepenthes jacquilineae

Two renowned Australian botanists and field research Dr. Charles Clarke and Troy Davis climbed a remote peak in Sumatra and found there, two pitcher plants which were distinct in all respects from all species known at that time. Dr. Charles Clarke named one of the new species Nepenthes jacquilinea after his wife Jackie Clarke while Troy David named the second new species Nepenthes izumieae after his wife Izumi Davis. Both new species were formally described and published in 2001 and still today they remain among the most spectacular of all pitcher plants. Skaityti toliau…

LT.

In 1956 Professor Willem Meijer, a dutch botanist studying the flora of Sumatra, collected a herbarium specimen of a strange pitcher plant which he found on Mount Tujuh located in what is now the Mount Kerinci National Park. At the time, it was acknowledged that the plant was somewhat unusual in shape, however evidently soon the specimen was forgotten and overlooked. 41 years later, Dr. Matthew Jebb and Dr. Martin Cheek of the Kew Royal Botanic Gardens, England, studied the same specimen once more and concluded that the plant which Willem Meijer found was certainly a new species of pitcher plant (Nepenthes) and one of the most distinct of the entire genus. Dr. Matthew Jebb and Dr. Martin Cheek named the new plant Nepenthes arisolochioides in reference to the similarity of the pitchers of this plant with the shrub genus Aristolochia and so a new species was borne into science.

Nepenthes aristolochioides

Nepenthes aristolochioides

Since it was described Nepenthes aristolochioides has been studied several times by field botanists in its natural habitat. However it still remains a relatively little known species, and so in 2007, I traveled to Sumatra in the company of two friends Alfindra Primaldhi and Apriza Suska in order to study this plant in its natural habitat. Skaityti toliau…

LT.

In general terms, the flora and fauna of Australia displays clear differences to that of South East Asia, especially the major islands of the Sunda Shelf. This distinction in plant and animal life led the 19th century naturalist Alfred Russell Wallace to propose a theoretical boundary line to distinguish the wildlife of the two regions (the so-called Wallace Line). Yet despite the differences in plant and animal life, pitcher plants (Nepenthes) which are widespread and diverse in South East Asia, occur in the north of Australia. Three species have been discovered so far, all of which occur only in Queensland on the Australian continent. One is N. mirabilis, a widespread species which occurs north across most major islands of the South East Asian archipelago to southern China. The remaining two species are endemic to Australia, and occur nowhere else in the world.

The spectacular pitchers of Nepenthes mirabilis

The spectacular pitchers of Nepenthes mirabilis

The Nepenthes of Australia have a prominent role in the history of the exploration of Queensland. All three Nepenthes species were first observed and collected by Frank Jardine who was among the earliest European pioneers to settle the Cape York peninsula. During the late 19th and early 20th century, eleven species of Nepenthes were described from the Cape York region, although most are no regarded as synonyms of N. mirabilis or merely ecophenes of that species. Skaityti toliau…

LT.

Of the 2,400 species of bromeliads distributed across the world, at least 400 species are tank bromeliads.

Brocchinia hechtioides – a spectacular tank bromeliad from Venezuela

Brocchinia hechtioides – a spectacular tank bromeliad from Venezuela

The tank bromeliads are distinguished in that they produce foliage that is arranged as a watertight leaf rosette adapted to collecting and storing rain and organic debris to provide a source of water and nutrients. In most cases, the foliage of tank bromeliads has hollow leaf axils in which water can collect however in a few species, the foliage is tightly arranged to form a tube and water collects only in the center of the leaf rosette. Skaityti toliau…

LT.

On the summits of the spectacular Tepuis of the Guiana Highlands, South America, fifteen species of pitcher plants of the genus Heliamphora have been discovered. One of the least documented and least studied of all is Heliamphora exappendiculata which occurs at the heart of the Guiana Highlands on the Chimanta Massif – a massive complex of gigantic plateaus standing up to 2,600 meters in altitude. Heliamphora exappendiculata was first discovered by famed botanist, naturalists and explored Bassat Maguire who formally described it in 1978. Maguire originally thought that it was a subspecies of a different species of pitcher plant and named in Heliamphora heterodoxa var. exappendiculata, referring to the Latin word ‘ex’ meaning ‘lacking’ and ‘appendicula’ meaning ‘appendage’ in reference to diminutive nectar secreting structure at the back of the pitchers of this species. Recently it had become clear that it is not closely related to Heliamphora heterodoxa as Maguire had originally assumed and in 2006, after previously re-finding the little known plant, German botanists Joachim Nerz and Andreas Wistuba formally renamed the plant as Heliamphora exappendiculata as an independent species.

The uniquely shaped leaves of Heliamphora exappendiculata

The uniquely shaped leaves of Heliamphora exappendiculata

Skaityti toliau…

LT.

Sarracenia is a genus of eight species of pitcher plants that naturally occurs across North America, mainly in the southern gulf coast of the United States of America. Sarracenia are noteworthy in that all species of this group produce spectacular tubular foliage which is often bright coloured and very beautiful. The hollow, tubular leaves (like those of all pitcher plants) are adapted to trapping and digesting arthropods (mainly flying insects) which enables these plants to survive in wetland habitats that are otherwise deficient in essential nutrients and minerals. In this way Sarracenia plants augment nutrients and minerals which they cannot acquire from the substrate of their habitats and are able to survive in barren, inhospitable areas where regular (non-carnivorous) plants cannot grow.

Sarracenia flava and Sarracenia leucophylla growing naturally in Alabama, USA

Sarracenia flava and Sarracenia leucophylla growing naturally in Alabama, USA

The genus was named in honour of the Canadian physician Dr. Michel Sarrazin who, at the start of the 18th Century, secured twenty-five specimens and sent them to the French botanist Joseph Pitton de Tournefort for classification. In gratitude, Tournefort later named the genus Sarracenia in honour of Sarrazin and so the group was named.

Skaityti toliau…