Ludwigia glandulosa

Cylindricfruit primrose-willow

Ludwigia glandulosa

Cylindricfruit primrose-willow

(15 ratings)

Magnificent red stem plant
Narrow leaf shape
Upright growth habit

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Middle ground

Background

Accent (color)

Street (Dutch style)

Aquarium Plant Characteristics

Difficulty Medium

Growth Medium

Light High

Maximum water hardness for this aquarium plant in the aquarium

Water hardness max. Medium

Recommended care height 15-60 cm

CO2 Yes

Variation

Pot - Ø 5 cm

starting at

€

in Vitro XL - Ø 8,5 cm (out of stock)

Quantity	Unit price	Saving/Piece	Discount
1+	€ 5. 90
2+	€ 4. 90	€ 1.-	16%
3+	€ 4. 40	€ 1. 50	25%
5+	€ 3. 90	€ 2.-	33%

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Description

Ludwigia glandulosa is one of the most colourful aquarium plants and is very different from many other aquarium Ludwigias. This species is a marsh plant from wetlands in south-eastern North America. It is often produced in aquatic plant nurseries under false names such as "Ludwigia perennis" or "Ludwigia peruensis". The strong shoots, which can grow to over 20 cm tall, usually grow upright under water and are hardly branched. In very strong light, they can also grow ascending, almost creeping, and then form many roots and side shoots at the base. The rigid stem is to over 3 mm thick. It is densely covered with lanceolate, 3 - 11 cm long, alternate leaves. Especially when there is a lot of light, the leaves are a strong wine-red colour, when there is less light they are more olive-green, but also have a wine-red underside.

Submerse Blattform der Ludwigia glandulosa

In the terrestrial form (emersed form), the plant can form long, woody, prostrate to erect shoots. These also form flowers and subsequently seed pods. The leaves on the flower shoots and also the flowers in the leaf axils are inconspicuous green.

Ludwigia glandulosa is more demanding than various other Ludwigias in the aquarium hobby and grows relatively slowly. Strong lighting, complete macro- and micronutrient supply via the water column as well as the substrate and CO₂ addition are recommended. The temperature range is about 10 to 27 °C; 22 to 25 °C is optimal. It is best to plant a group of individual stems of different heights a few centimetres apart. Propagation is done by cuttings.

Ludwigia glandulosa is a real eye-catcher in the aquarium midground as a free-standing, solitary group of shoots of different lengths up to about 20 cm high and forms a strong colour accent. It contrasts with light green plants. This species from the warm-temperate southeastern USA is particularly interesting for cooler tempered aquariums.

Two subspecies of the cylindric-fruited primrose willow, Ludwigia glandulosa (ssp. glandulosa and ssp. brachycarpa) are found in most of the southeastern states of the USA. To the north its area of distribution extends to Illinois and Indiana. It prefers wetlands, but also wet road ditches. Despite its large distribution it is considered endangered to critically endangered in Indiana and Louisiana.
In the trade, it is often found under the erroneous name of "Ludwigia perennis", which is not a synonym for L. glandulosa but the name of another species found in Asia, Africa and Australia. It is also often sold under the trade name of "Ludwigia peruensis", obviously deriving from "perennis".

L. glandulosa has lanceolate alternate leaves (1 leaf per node). The submersed stems grow strictly upright and hardly ramify, whereas the land form develops creeping runners as well as upright, ramified shoots up to 80 cm in height. During summer (or long-interval lighting), inconspicuous green, petalless flowers develop in their axils.

Ludwigia glandulosa is not easy in culture. If the light is not intensive enough, its leaves first turn green and are then shed. Even under lots of light the plant tends to shed its lower leaves. A good micronutrient supply, paired with sufficient iron as well as very strong light is a must for this plant.
Given that these conditions are met, L. glandulosa has no further high requirements. It doesn't need especially high levels of nitrate or phosphate; these macronutrients should be present, though. Experience shows that it grows very well when the concentration of NO3 is 5-25 mg/l and the PO4 concentration is 0.1-3 mg/l. In contrast to many other red-leaved plants, L. glandulosa does not require low levels of nitrate to keep its reddish colour.

Unlike other Ludwigia species, the submersed form of L. glandulosa hardly ramifies at all. It grows straight to the water surface and further, without developing lateral shoots. To induce their formation it is necessary to cut off the central shoot.

Its intensive colour makes L. glandulosa an ideal accent plant for aquaria. The strong reddish-purple colour of the leaves is a real eyecatcher. Its relatively slow growth and its upright habit make it an optimal plant for so-called plant roads in Dutch tanks.

Common names	Cylindricfruit Primrose-Willow
Synonyms	Ludwigia cylindrica Elliot, Ludwigia glandulosa ''Perennis''
Misapplied names	Ludwigia perennis, Ludwigia peruviana
Trader names	Ludwigia peruensis
Complete botanical name	Ludwígia glandulósa Walter
Family	Onagraceae
Genus	Ludwigia
Difficulty	medium
Usage	Accent (red), Background, Midground, Street (Dutch style)
Aquascaping	very colourful plant for accents
Growth	medium
pH value	5 - 7
Temperature tolerance	10 - 27°C
Carbonate hardness	2 - 10°dKH
General hardness	0 - 30°dGH
Propagation	Seeds, Cuttings
Can grow emersed?	yes
Source	Flowgrow