Mexican Purslane
Portulaca mexicana
Portulaca mexicana is a low-growing succulent plant native to numerous states across Mexico. First described …
Tingo María Purslane (Portulaca tingoensis)
Silhouette: T. Michael Keesey
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Portulaca tingoensis: Taxonomy, Distribution, and Subspecies
Thriving across the varied terrains of South America, Portulaca tingoensis inhabits specific ecological niches within Argentina and Peru. This succulent species demonstrates significant environmental adaptability, establishing itself in provinces like Jujuy, La Rioja, and Salta. Its presence across these national borders highlights a broader Neotropical distribution pattern typical of resilient upland flora.
A notable aspect of its taxonomy is the formally recognized subspecies, Portulaca tingoensis andina, which indicates localized evolutionary divergence. The species was initially described by the American botanist James Francis Macbride during his extensive work on South American flora.
Taxonomy
- ∟ царство Plantae
- ∟ division Tracheophytes (Vascular Plants)
- ∟ subdivision Spermatophytes (Seed plants)
- ∟ Angiosperms
- ∟ mesangiosperms (Core angiosperms)
- ∟ eudicots
- ∟ core eudicots
- ∟ Superasterids
- ∟ order Caryophyllales
- ∟ подотряд / подпорядок Portulacineae
- ∟ family Portulacaceae (Purslane family)
- ∟ genus Portulaca (Purslane genus)
- ∟ species Portulaca tingoensis (Tingo María Purslane)
Morphology
The vegetative structures of Portulaca tingoensis are adapted to cope with the environmental stressors typical of its South American habitats. It exhibits the fleshy, water-storing leaves and stems that are the hallmark of the family Portulacaceae. These morphological adaptations are crucial for surviving seasonal dry periods and fluctuating upland temperatures.
While specific leaf dimensions and floral colors can vary, the plant maintains a generally low-profile growth habit. The existence of the subspecies P. t. andina suggests morphological variations that correlate with higher altitude environments in the Andes.
Interesting facts
The taxonomic history of Portulaca tingoensis is closely tied to early 20th-century botanical expeditions in the Andes. James Francis Macbride, who authored the species description, was instrumental in cataloging the flora of Peru for the Field Museum of Natural History. The designation of an Andean subspecies points to the plant's successful colonization of challenging high-altitude ecosystems.
Geography of distribution
- Argentina
- Peru
Sources
- Plants of the World Online (POWO)
- Global Biodiversity Information Facility (GBIF)
- Catalogue of Life
See also
Red-Stemmed Purslane
Portulaca rubricaulis
An annual succulent herb characterized by distinctive reddish stems and solitary yellow flowers, found across …
Extremely Hairy Purslane
Portulaca hirsutissima
A succulent plant endemic to Brazil, characterized by its prominent hairy morphological traits and described …
Giulietti's Purslane
Portulaca giuliettiae
A rare succulent plant species in the purslane family, naturally endemic to the Bahia region …