Utricularia bremii
Driving Turio of Utricularia bremii
Bremis water bladderwort (Utricularia bremii ), also Petite water hose, is an aquatic plant of the genus of the water hoses ( Utricularia ), in the section Utricularia.
Description
The type is a rootless, sometimes free-floating, usually by rung at the bottom -mounted multi-year hydrophyte, the plant is located ( with the exception of the flower ) is completely under water. The underground shoots are 25 to 60 millimeters long, chlorophylllos, have one to eight traps and extremely reduced leaves. The stems are in the water up to sixty inches long. The numerous circular to ovate leaves are up to two inches long and up to basically 3 parts. The individual sections are again 4-5 times dichotomously divided. 12 to 25 (-50 ) rulers Endzipfel available - total there are per sheet (9). There are sheets each of 1 to 7 (-10 ) Tubes (Fang bladder). They are oval and 1 to 2 millimeters long. The inflorescence is an erect, emergent, 5-42 (60 ) cm high, 2-14 flowered, loose grape. The cup is in two parts. The crown is golden yellow, two-lipped, 8-9 mm long, and about as long as wide. The upper lip is ovoid, and more or less just as long as the brown-red striped palate. The lower lip is round, 8-9 mm in length and more or less spread out flat. The spur is seen briefly and laterally about as long as wide. The two stamens are bent. Mature fruits and seeds have never been observed.
The flowering period extends from July to October.
Utricularia bremii is probably aneuploid.
The hibernation this hydrophytes done on the ground or in the mud of the waters by special spherical to oval winter buds ( turion ), which form at the shoot tips in the fall. In Utricularia bremii the pollen are almost always ill- formed, capsules and seeds are not known. The species seems like Utricularia ochroleuca and Utricularia australis usually only vegetatively to reproduce ( it is probably also aneuploid ).
Similar Species
From the little water bladderwort (Utricularia minor) Bremis water hose is vegetatively not sure distinguishable. However, Utricularia minor is smaller in all its parts. The leaf sections are usually divided dichotomously 2-3 times, taking the total per sheet 7 to 22 Endzipfel available. The inflorescence consists of 2-6 lemon yellow flowers, these are usually longer than wide. The lower lip is oval and not more than 5 mm long; the lateral edges are beaten down. The spur is seen very briefly and laterally wider than long. The capsule is small and spherical. The seeds are about 1 mm long.
When ordinary water hose ( Utricularia vulgaris) and Southern Water bladderwort (Utricularia australis) the Endzipfel of the leaves on the edge are covered with fine, spine-like teeth.
The average water bladderwort (Utricularia intermedia) and pale yellow water hose ( Utricularia ochroleuca ) have their tubes and sheets always at different rungs. The hoses on the leaves serve the catch of plankton animals.
Propagation
Because of their late flowering time, which is similar to the Southern Water bladderwort (Utricularia australis), rarely leads to the maturing of the seeds, the plant is propagated mainly vegetatively by division along the stem axis.
Dissemination
Bremis water hose is considered subatlantisches Florenelement and is spread very scattered in Europe, but is missing in the Mediterranean region, the Balkans, Sweden and Finland. In the north it extends from Ireland to Denmark, in the south of France over northern Italy and Hungary to the upper Dniester region, where it reaches the eastern site boundary. However, focus their occurrence are the regions of the Danube and Upper Rhine. The European distribution is not yet known in detail.
In Germany, the species exists only in Middle Franconia in six ponds in Aischgrund at Hochstadt an der Aisch, at a site in Sebalder Reichswaldhalle and in Wehrda in Hesse. The Bavarian stocks were at times severely threatened and have since stabilized by protective measures. Bremis water hose is protected in Germany by the Federal Species Protection Ordinance.
In Switzerland, where she is on the red list, yet there are five sites known in Austria, it occurs in Carinthia and Lower Austria.
The plant prefers low-nutrient, light, acidic waters.
Ecology and plant communities
The species occurs (eg Carex elata between T. - tussocks ), in Torfstichweihern and ( intermediate marsh ) and hollows in Torfgräben ago in pools in the area of flat and raised bogs. It grows in clear, neutral to moderately acidic ( mesotrophic ), moderately nutrient-poor water often about 5 to 20 centimeters deep flooded peat mud or sandy loam soils. You can endure occasional drying of the location, the vitality of the stocks but in the course of a year fluctuates often strong. At the Swiss localities be the pH values from 7.4 to 8.7. The species is kollin in Switzerland to montane ( subalpine ) at altitude 440-1555 meters spread (highest point in Crans in Valais ).
Utricularia bremii is considered Verbandscharakterart of Sphagno - Utricularion WASTE ET goers 60 and is probably particularly in Sparganietum minimi TX. 37 before, but is analogous to Utricularia minor to be expected in other societies of the Federation ( For example, in Scorpidio Utricularietum minoris WASTE. Goers ET 60), he also grows possibly also in companies of Scheuchzerietalia palustris NORDH. 36 and partly in Caricetum Elatae W. COOK 26 Often it is associated with Utricularia minor and sometimes other species of the genus.
System
Utricularia bremii was formerly placed as a variety or subspecies of Utricularia minor, but now Utricularia bremii as a separate species considered. From Utricularia minor but it is only flourishing sure to distinguish both species bloom but not depending on the location every year. The scattering regions of the vegetative characteristics overlap strongly, a distinction is usually only statistically possible. Previously studied populations are genetically not very variable.