Purplemat

Basic Information

Common Name: Purplemat
Scientific Name: Nama demissum
Native Habitat: Southwestern United States and Northwestern Mexico (arid and semi-arid regions).

History / Discovery / Cultivator

Nama demissum, commonly known as Purplemat, is a low-growing annual plant belonging to the borage family (Boraginaceae). While the exact date and circumstances of its initial discovery remain somewhat obscure in readily available historical records, its botanical classification and subsequent study have been a gradual process involving numerous botanists and plant explorers. The plant’s presence in the southwestern United States and northwestern Mexico suggests that indigenous peoples were undoubtedly familiar with it long before its formal scientific description.

The “Nama” genus itself has a rich taxonomic history. The genus was named to honor Jean Baptiste Christophore Fusee Aublet, a French pharmacist and botanist who specialized in Guiana flora. The suffix “demissum” describes the plant’s flattened or low habit. Purplemat’s documented botanical study started in the late 19th and early 20th centuries, as botanists began to systematically explore and document the flora of the American Southwest. While no single individual is credited with “discovering” the plant, various botanists involved in regional surveys contributed to its identification and classification. These early botanists contributed invaluable data on its morphology, distribution, and ecological preferences.

The plant’s relatively inconspicuous nature and preference for arid environments might explain why its cultivation and popularization have been limited. It hasn’t become a mainstream horticultural subject for several reasons. First, its compact size and often fleeting presence in the landscape make it less appealing to gardeners seeking more visually striking or long-lasting plants. Second, its adaptation to dry conditions means it requires well-draining soil and careful watering to thrive in cultivation, which can be challenging for those unfamiliar with desert plants. Purplemat is also very difficult to transplant so direct sowing in a xeriscape environment is usually required.

Furthermore, the plant’s specialized ecological role might make it a better fit for native plant enthusiasts or those interested in ecological restoration projects, rather than typical gardeners. It plays a role in stabilizing soil and providing food and habitat for desert wildlife.

Currently, there’s little evidence of widespread commercial cultivation. However, with growing interest in drought-tolerant landscaping and native plant gardening, it’s conceivable that Purplemat could become more popular in the future. It’s particularly charming when it carpets rocky areas in purple blooms. Its value would be in its ability to add low-maintenance color and support local ecosystems. For now, though, Nama demissum remains a fascinating but relatively obscure member of the southwestern flora.

Plant Care Summary

Botanical Insights

Adaptations

Purplemat exhibits several adaptations that allow it to thrive in its arid environment. Its small size and low-growing habit help it conserve water by reducing surface area exposed to the sun and wind. The plant also has a relatively short life cycle, completing its growth and reproduction quickly during periods of sufficient moisture. Its seeds are adapted for dispersal by wind or animals, ensuring that the plant can spread to new areas. The Purplemat’s high drought tolerance is due to the fact that it is a desert ephemerals, blooming after rain and tolerating heat.

Propagation Methods

Purplemat is primarily propagated by seeds. Direct sowing is the most effective method. The seeds should be sown in well-draining soil in a sunny location in the fall or early spring. No seed pretreatment is needed. Purplemat can also propagate itself through self-seeding.

Toxicology

Nama demissum is generally considered non-toxic to humans and pets. There are no known reports of toxicity associated with ingestion or skin contact. However, as with any plant, it’s always a good idea to exercise caution and prevent excessive consumption, especially by children and pets. If ingestion is suspected, monitor for any unusual symptoms and contact a medical professional if necessary.

Common Problems

Pests:

• Aphids
• Spider mites
• Whiteflies

Diseases:

• Root rot (due to overwatering)
• Powdery mildew (rare, but possible in humid conditions)

Other:

• Leggy growth: Insufficient sunlight. Provide more direct sunlight.
• Failure to bloom: Insufficient watering or lack of nutrients. Adjust watering schedule and consider a light feeding with a balanced fertilizer.
• Yellowing leaves: Overwatering or poor drainage. Allow soil to dry out completely between waterings and ensure well-draining soil.

Rarity & Value

Rarity:

Purplemat is not generally considered a rare plant. It is relatively common within its native range in the southwestern United States and northwestern Mexico. It’s rarity in cultivation is due to its narrow requirements in the home xeriscape and its need to be direct sown.

Value:

Purplemat is not a commercially valuable plant in the traditional sense. However, it has value as a component of native plant communities and as a source of food and habitat for desert wildlife. It can also be used in xeriscaping projects to add low-maintenance color and beauty to the landscape.