This section includes the selective papers about an aquatic Araceae plants in English.
Waiting is a very strange feeling. Even the waiting for happiness is sometimes extremely painful. Time stops, the hands of the clock slow down, and the soul is torn in an effort to speed up the oncoming of the happy moment. Some plants, like humans, are not immune to this feeling. Today, the hero of my story will be an inhabitant of the northern latitudes, the most frost-resistant representative of the Aroid family – the Water Arum (Calla palustris, Fig. 1). This plant has only one, but a very serious opponent – the low ambient temperature.
Figure 1. The inflorescence of the Water Arum (Calla palustris) has a white spatha, which resembles the sail of a ship.
Waiting. The Water Arum waits for spring. Waits to find its happiness. And nothing can prevent it from achieving this goal, neither May frosts, nor excessive floods. Warm days will inevitably come, the snow will melt, and the white sails of Calla will curl over the swamps of central Russia.
I would like to devote this short story to a very pleasant and kind person - the Indonesian Welly Yansen, who suffered a huge and irreparable loss last December - he lost his beloved wife and long-awaited son at the same day. It is impossible to realize and accept, but life goes on. I will always remember our first pleasant meeting, and at this difficult moment in his life I want to express words of support and gratitude to him.
The following events took place in November 2019. My wife and I continued our journey around the island of Sumatra. We took a local flight from Medan to Pekanbaru (the capital of the Riau province). This is a large metropolis and a center for oil refineries, so we did not stay there for a long time and went by car straight from the airport to the south to cross the Equator. Our goal was the small town of Rengat, located almost on the Equator, or to be more precise, at a point about 0 degrees 22 minutes and 30 seconds south, i.e. in the southern hemisphere of our planet. The symbol of the city is the rather flavorless, slightly sour fruit, the June Plum (Spondias dulcis). Indonesians call it kedondong. But for a naturalist, the Indragiri River (Fig.1), which flows through the city and is the habitat of the Sumatran barb (Puntigrus tetrazona), is more important.
Figure 1. The Indragiri River (near city of Rengat).
The Pacific blue-eye (Pseudomugil signifier) is a species of the subfamily Pseudomugilinae. It is one of the most underestimated species of this family among aquarists. For example popondetta attracts the attention of fans with bright yellow fins, and iriaterinas has unusual braids and body shape, meanwhile the pseudomugil signifer can only rely on the color of the eyes and the interesting colors of the fins in males, which appears after many months of home maintenance. It is clear that with such background data, even considering the low price of these fish, this blue-eye species is familiar to a very narrow circle of hobbyists. Nevertheless, the idea of an article about this wonderful species came to my mind, but the lack of decent photos in our archives, and the busyness did not allow the idea turn into a paper.
But after we have been lucky enough to observe this species in nature, take many photos and even videos of pseudomugils Australian biotopes, all doubts were in the past. The species was first described by Rudolf Kner, an Austrian zoologist, in 1866. The specific name of the fish can be translated from Latin as carrying lights! Very romantic.
- Good morning! I would like to have some fries, some cheese sauce, and a Big Mac with Cryptocoryne, please.
-- Your order is ready, sir! Pick it up, please.
- Sorry, there is not enough Cryptocoryne here ...
- Oh, sorry. Our Cryptocoryne grows in the yard, take it yourself!
Despite the fact that this dialogue is fictitious, the described situation could well have happened in the small town of Kota Tinggi in the Malaysian state of Johor. The fate that had led me to the Malay Peninsula gave me a rare chance - to watch Cryptocoryne plants in their natural habitat, located within the city limits.
Cryptocoryne ciliata grew just 100 meters away from McDonald's and the city's central square (Fig. 1). In the morning hours, the Sungai Bang River, armoured with granite banks, looked lifeless. Rare pedestrians and a lonely angler who was checking his nets disrupted the quiet life of the provincial town (Fig. 2). Nevertheless, the huge amount of litter, dumped both, on the sidewalks and in the river, made me suppose that every evening this place transformed into a recreation center for the townspeople.
It's no secret that a tourist can have different aims: to go on a beach holiday, to taste local food, to learn about culture or architecture. It depends on the individual preferences of the person. Today, I suggest using a new term - “aroid tourism”, which in fact I have been dealing with for several years, going on trips to tropical countries. As in the case with a restaurant menu, for each region I visit, I make my own “aroid card”. As a rule, it includes both endemics of the area and plants with a wider habitat. The latter can also have their own individuality due to the geological and climatic features of the region.
Today I’m trying to compile an "aroid card" of the Vietnamese island of Phu Quoc. It is very easy to do this for an area of just over five hundred square kilometers. It is enough to go to the tropical forest a couple times or to walk some kilometers along the bank of a small river. Aroids live in the tropics either along the river banks or in the shade under the canopy of the rainforest.
Fanciers of Cryptocoryne have a firsthand experience in challenges of keeping these plants from Malay Archipelago. Most part of Cryptocoryne from this region lives in Sumatra and Kalimantan, as well as small adjoining islands. The variety of species is huge. Today science knows more than five dozen species and subspecies of Cryptocoryne that have found their home on these islands. Almost all of them, with rare exceptions (Cryptocoryne ciliata, C. pontederiifolia, C. wongsoi and some others), live in small forest streams and rivers with very soft and acidic water (pH = 4-6; TDS = 5-40 ppm). At the same time, the water in the Moscow water supply system is close to neutral and contains by an order more hardness salts (pH = 7-7.5; TDS = 120-200 ppm). Given the sensitivity of Cryptocoryne to fluctuations in water parameters, considerable challenges come up in their maintenance. Some plants “melt down” within a few days after planting, while others stop growing and decay for a long time until they disappear completely.
Figure 1. A small creek with Cryptocoryne scurrilis on an hevea plantation in Sumatra (Riau Province). рН = 4.0, TDS = 25 ppm.
Today I will share my experience on how to keep soft-water Cryptocoryne species in your collection and enjoy watching these interesting plants every day.
Bucephalandra plants are currently the most promising plants in the Araceae family for keeping in decorative home aquariums. The small size, a variety of shapes and colors, slow growth, the ability to grow on rocks and driftwood - all of these features are undeniable advantages of these Kalimantanian endemics. Along with it, Bucephalandra are highly susceptible to diseases. And most of these pathologies come with the plants which were collected in the wild. In the mountain streams of Kalimantan you will never find a completely healthy Bucephalandra (Fig. 1).
Figure 1. Bucephalandra bogneri S.Y. Wong & P.C. Boyce in the wild. Note that many leaves suffer from anthracnose of unknown etymology (“brown spots”). Photo: D. Loginov.
Due to the fact that most of the Bucephalandra plants in the modern zoo industry are imported from their natural habitats, aquarists who buy them are in a very difficult situation. However, it should be noted that these concerns relate in lesser degree to those who keep the plants in submerged conditions, as under water most of the pathogens do not develop. At the same time, the growing of Bucephalandra in paludariums is almost impossible without a number of quarantine and treatment measures.
You can believe in miracles or not, but sometimes they do happen. This axiom is consistently confirmed every year by wetland plants of the genus Bucephalandra. Only 5 or 7 years ago, they entered our aquariums, disturbing the steady life of the rest of the aquatic flora. Such traditional plants of the home tank as ferns, Anubias and Cryptocoryne got a serious competitor.
Bucephalandra is a genus of medium-sized rheophytic plants, which are endemic to fast mountain streams of Kalimantan. A huge variety of shapes and colors, as well as the flexibility to the growing conditions, allowed them to sink deep into the hearts of both, hobbyists and ordinary aquarists.
Figure1. Bucephalandra sordidula. Photo: S. Bodyagin.
It is gratifying that Bucephalandra did not stop there and continued expansion, constantly preparing new and new surprises for its admirers. We can attribute to such pleasant discoveries the recent description of 25 new species (the genus has currently 27 valid species), as well as the creation of an intergeneric hybrid between Aridarum caulescens M. Hotta & Bucephalandra bogneri S. Y. Wong & P. C. Boyce. The latter event is significant and unique: it is the first and only example of a successful intergeneric crossing within the family Araceae. In this article, we will continue to surprise our readers (and ourselves) and tell you about a recently discovered unusual type of vegetative propagation inherent in only one species - Bucephalandra sordidula S.Y. Wong & P.C. Boyce.
It is for the last few years that a ghost of Cryptocoryne disease has been wandering among Anubias plants fanciers. Almost every aquarist has come across the problem of the plants death soon after they have been purchased. Although it was only 15 years ago when the plants were compared with plastic models and thought to be of an ideal health. What may cause such a severe attack of disease? Though I don’t have any definite answer, I will readily share the guessworks and facts I’ve learnt with the reader.
To start with, I’d mention that I’ve already have to face several types of Anubias plants disease by my experience. The first type can be recognized when rhizome and leafstalk tissues become glassy quickly and die off within 2-3 days. As a rule, the disease is preceded by some abrupt changes of the plant conditions, such as delivering, replanting, undercooling or overheating. All this can be fully applied to Cryptocoryne plants. The only difference here is that the disease affects leaf tips tissues instead of rhizome ones. The rot of tissues may start due to poisoning with ammonia which is released during the plant respiration. Sometimes it results in a complete die-off. Yet I cannot say definitely whether it is caused simply by changing the plant conditions. Thinking about the cause, I recall an incident when several dozens of Anubias afzelii bushes were completely burnt by hot water due to a break in a water pipeline. The plants lost all their leaves, but soon recovered completely as their rhizomes survived. The entire state of the initial material may be of great importance. The better conditions Anubias plants have been grown in, the more tolerant they are to different factors.
Anubias afzelii is quite a big plant compared with other aquatic plants, as its mature specimen can grow up to a meter’s high. Aquarists prefer young plants to decorate their tanks. Such bushes grow very slowly when planted submerged and keep their small size for a long time. In the tank Anubias normally has not more than 5-7 leaves (the old ones die off, the new ones grow too slowly). It blooms also very seldom, as a rule only in a full-grown state, and when kept in a greenhouse. My plant started to bloom only in the 5th year. Its inflorescence is big and very beautiful, so these years of waiting were not spent for nothing. It’s worth seeing at least once!