Pinguicula rotundiflora Studnicka (1985)

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TAXONOMY:

Family : Lentibulariaceae

Genus : Pinguicula

Name :  Pinguicula rotundiflora

 

Sub-classification (Casper) : link

Publication : By Miroslav Studnicka in Folia Geobot.Phytotax.20:201 (1985)

 

Synonyms : According to the carnivorous plants database of Jan Schlauer in the ICPS :

Pinguicula rayonensis {Zamudio Ruiz & Lux} nom.nud.

P: in sched. (1992)

T: 10 km from Rayones-Galeana gorge, Nuevo Leon, MX, 26. 11. 1991, S.Zamudio Ruiz, E.Perez-Calix & A.Garcia-Arevalo (IEB)

Pinguicula jorgehintonii {B.L.Turner}

P: Phytologia 74:69 (1994)

T: N Aramberri, Mpio. Aramberri, Nuevo Leon, MX, 23. 11. 1993, G.B.Hinton & al. 24000 (TEX)

DESCRIPTION :

 

- soon -

 

translation :

 

- soon -

ORIGIN AND HISTORY :

This species was first mentioned in Harald Weiner's seeds catalogue around 1980 under the name Pinguicula "species nova N°2". The species was then officially published in 1985 by Miloslav Stunicka under the name Pinguicula rotundiflora.

Map / LOCALISATION : 

 

This species can be found near Minas de Asbesto at Jaumave, Tamaulipas, Mexico.

 

 

But also in others locations in Nuevo Leon : 

- North of Aramberri, municipality of Aramberri

- 10 km from Rayones-Galeana gorge

- Municipality of Galeana, road from Agua Blanca to La Purisima, pine-oak woodland.

 

 

(click on the map for better location and relief map)

HABITAT:         

This species can be found growing on calcareous soil, with a vegetation of Lidambar styraciflua, Pinus and Fagus mexicana, at altitude of 2200m (Minas de asbesto, Tamaulipas, Studnicka) and at altitude of 1300, on gypsum soils with xerofil vegetation (10 km from Rayones-Galeana gorge, Nuevo Leon).  

TEMPERATURE and PRECIPITATIONS :

Nuevo Leon

Cuidad victoria

Click on the graph to enlarge and see the graph of normal precipitation and normal average temperatures. Normal values are 30-year averages for the period 1961 to 1990. The weather stations are grouped by region (see map of weather stations).

Introduction in culture :

This species can be easily found worldwide in many carnivorous plants collections and carnivorous plants nurseries.

CULTURE AND MULTIPLICATION : 

(North hemisphere, France near Paris, in a polycarbonate greenhouse - see the map -)

Life cycle : The life cycle observed in culture for this Pinguicula consists of two seasons, one wet and the other dry (see link). The plant forms different leaf rosettes according to the season. During the resting months (winter) the small succulent rosette is composed of numerous non-carnivorous leaves. The carnivorous leaves are produced in spring and during all summer. The flowering occurs from the winter rosette. The life cycle of the plant is probably similar in it's native habitat but I have no data.

 

Media : I use a 100 % mineral media : 2 perlite, 2 vermiculite, 1 small sand (for aquarium), 1 fine white sand, 1 pouzzolane (volcanic lava), 1 aqualit (expansed ceramic for aquarium). The aqualit can be replaced by 1 of pouzzolane. Plants in this media grow slower but have a stronger root system.

 

Pot : plastic, colour terracotta, diameter 12.5cm, height 12cm.

 

Cultivation : I think that a slightly airy situation inside the greenhouse is important to avoid air stagnation. For this reason, I use a fan 24h/24h all the year round.

Watering is very important : from May to September (summer). I let the media drying slightly between two watering. I use rain water poured on the top of the pot taking care not to wet the rosette.  From October to April, It is important to let the media drying completely (no watering) but with an atmospheric humidity of about 80%. 

The mentioned months are indicative and can change according to your own growing conditions. In fact, when this Pinguicula begins to produce its non-carnivorous leaves, you have to stop watering and let the pot drying out completely. Inversely, when the plant begins to produce in early spring its carnivorous leaves, you have to progressively start watering again the pot.

Temperatures : during growth period, day temperatures are about 25°C but may reach 35°C when the sun is shining on the greenhouse in spite of the use of shading covers. Night temperatures are around 20°C. During resting period : day/night over freezing point. Lower temperature observed : - 4°C. I use an electronic petroleum heater to provide heat.  

 

Multiplication : I have succeeded once in pollinating the flowers of this Pinguicula but the seeds didn't germinate. The plants can be propagated  very easily using non-carnivorous leaves separated from the rosette  at the end of winter. You only have to carefully tear out the totality of the leaf including the white base as the plantlets will sprout from this area. Summer leaves can be used too.

PICTURES: (click to enlarge)