Carnivrous Plants: Pinguicula moranensis

Pinguicula moranensis commonly known as Butterwort is a carnivorous plants which is native to Mexico and Guatemala. It succulent leaves are covered in pednucular (stalked) mucilaginous (sticky) glands which help it to attract and trap arthropods (invertebrate animals with exoskeletons) which it then digests with the sesile (flat) glands. The pednucular glands secrete a sticky substance which appears like droplets of water on the leaf. When an arthropod (mainly insects) touched the pednucular gland it releases more of the sticky substance and when the insect struggles to free itself it triggers other nearby glands to release more until it is encased in it.

Pinguicula moranensis in the Bristol University Botanical Gardens Greenhouses

The leaf can bend itself slightly through thigmotropism to bring more glands into contact with the prey. Once the prey is entrapped the sesile glands release digestive enzymes which to digest the prey breaking down the digestible parts of its body into liquids which are then reabsorbed by the leaf through cuticular holes leaving only the chitin exoskeleton behind.

The etymology of the genus name Pinguicula comes from the Latin pinguis which mean fat because of the buttery texture of the leaves while the specific name moranensis refers to its type location, Mina de Moran in the Sierra de Pachuca. This is where the three botanists Humbolt, Bonpland and Kunth collected specimens of the plant during an expedition in early 1800s. However, in 1999 a Mexican botanist S. Zamudio collected specimens in the same area and noted that the plants he had collected did not share the original description given by Humbolt, Bonpland and Kunt
Further investigation based on the travels of the earlier expedition led Zamudio to conclude that the plants collected by Humbolt, Bonpland and Kunt were most likely from an area called "El Puente de la Madre de Dios" in the Mexican state of Higaldo. He confirmed this by finding matching specimens of the plants in that area.
So it appears that due to some mix up these plants were misnamed. In the end Zamudio published his findings as a variation of  Pinguicula moranensis under the name Pinguicula moranensis var. neovolcanica.


Additional Information:

Scientific Name: Pinguicula moranensis

Common names: Butterwort (English); grassette de Moran (French); fleischfressende Pflanze (German); Violeta de barranca (Spanish);

Taxonomic hierarchy: 

Kingdom: Plantae - Plants

Subkingdom: Viridaeplantae – Green plants

Infrakingdom: Streptophyta – Land plants

Division: Tracheophyta – Vascular plants

Subdivision: Spermatophytina – Spermatophytes (seed plants)

Infradivision: Angiospermae – Angiosperms (flowering plants)

Class: Magnoliopsida –

Superorder: Asteranae –

Order: Lamiales –

Family: Lentibulariaceae – bladderworts

Genus: Pinguicula – 

Species: Pinguicula moranensis –

Notes: 

• I am using the taxonomical classification system used by ITIS (Intergrated Taxonomic Information System). I have decided to use this system in order to avoid confusion as well as because it offers a comprehensive hierarchy from kingdom right through to subspecies whereas other sources only go as far as order or  provide the names of some of the higher taxonomical ranks but only indicate "unclassified" rather than providing the rank.
• When and where possible I will endeavour to include alternatives classifications although  I may limit this to occasions where an opportunity arises to discuss the reason for the different classifications.
• Taxonomical data used in this post was retrieved [June 15 2014], from the Integrated Taxonomic Information System on-line database, http://www.itis.gov.

References:


On-line sources:

• Royal Horticultural Society: Entry for Pinguicula moranensis
• Official Website of the: Bristol University Botanical Gardens 
• World of Pinguicula: Entry for Pinguicula moranensis var. neovolcanica
• World of Pingicula: Pinguicula Distribution, Growth Habit by Dr. Laurent Legendre
• Missouri Botanical gardens: Entry for Pinguicula moranensis
• Integrated Taxonomic Information System on-line database: Entry for Pinguicula moranensis
• Seedaholic: Entry for Pinguicula moranensis
• Wikipedia: Entry for Pinguicula
• Wikipedia: Entry for Lentibulariaceae
• Wikipedia: Entry for  Lamiales
• Wikipedia: Entry for Anthropod

Additional resources:

•  Galleria Carnivora:
• Barry Rice: Carnivorous Plant Publications

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