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Native Plant Society of Texas

Alamo Vine

Merremia dissecta

Other common name(s):

Noyau Vine, Correhuela De Las Doce

Family:

Convolvulaceae (Morning Glory Family)

Plant Ecoregion Distribution Map

This map uses data from the US EPA. EPA  servers have been offline frequently so maps may not display. We are working on a solution.

Gulf Coast Prairies and Marshes, Southern Texas Plains, Texas Blackland Prairies
Coastal Sand Plain, Lower Rio Grande Alluvial Floodplain, Lower Rio Grande Valley, Northern Humid Gulf Coastal Prairies, Southern Subhumid Gulf Coastal Prairies
Northern Nueces Alluvial Plains, Rio Grande Floodplain and Terraces, Semiarid Edwards Bajada, Texas-Tamaulipan Thornscrub
Northern Blackland Prairie, Southern Blackland Prairie

Plant Characteristics

Growth Form

Vine

Height

10
to
12
ft.

Spread

.25
to
.50
ft.

Leaf Retention

Deciduous

Lifespan

Perennial

Habitat and Care Requirements

Soil Type(s)

Sand, Loam, Clay, Limestone, Caliche, Calcareous, Well Drained, Moist, Dry

Light Requirement

Sun, Part Shade

Water Requirement

Low, Medium

Native Habitat

Grassland

Bloom and Attraction

Bloom Color

White, Purple

Bloom Season

Spring, Summer, Fall

Seasonal Interest

Nectar

Wildlife Benefit

Butterflies

Maintenance

Give lots of room as it spreads quickly via rhizomes and self-seeds easily. It is good for erosion control. Tolerates alkaline soil. Needs good drainage. Very drought-tolerant and continues to bloom through summer even without water. Prune to direct growth. Propagation: seed.

Comments

Blooms May-November. A twining vine with intricately divided leaves. Alamo Vine has large white flowers with dark burgundy centers, that bloom in the afternoon. The fruit is a capsule.
Previous Scientific Name(s): Convolvulus dissectus, Ipomoea dissecta, Ipomoea sinuata, Operculina dissecta

References

Learn about how to propagate Texas native plants.

Material Treatment Method Collection References
Seed Scarification Sand or nick the seed coat to allow water to enter the seeds. 2. Soak the seeds for 24 hours. 3. Sow the seeds in moderately fertile, well-drained soil in pots or outdoors if the temperatures are 60 degrees F or warmer. Put them in an area in full sun or light shade. 4. Cover the seeds with a thin layer of soil. 5. Water the seeds. 6. Fertilize the seeds. 7. Water the plants during dry periods. A trellis, arbor or pergola can be used to support the vines.. https://floridaseeds.net/products/cutleaf-morning-glory-merremia-dissecta-organic-10-fresh-seeds-free-us-shipping
Stem Cutting If desired, dip the cut end of the stem in rooting hormone powder to promote root growth. Fill a small pot with well-draining soil, such as a mixture of sand and peat moss. Create a small hole in the soil with your finger or a pencil. Insert the stem cutting into the hole, making sure to bury at least one node under the soil. Gently press the soil around the stem to hold it in place and water the cutting well. Place the pot in a warm, bright location, but out of direct sunlight. Keep the soil moist but not waterlogged and mist the cutting daily to increase humidity. After a few weeks, new growth should appear, indicating that the plant has successfully rooted. Once it has grown enough, the cutting can be transplanted into a larger pot or planted outdoors in a suitable location. Start by selecting a healthy, mature Merremia Dissecta plant. Carefully cut off a stem of the plant using a sharp, sterilized garden knife or scissors. Make sure that the stem you have selected has several nodes, which are points on the stem where leaves or buds emerge. Remove the lower leaves from the stem, leaving only a few on the top. https://plantiary.com/plant/merremia-dissecta_5590.html
Root Cutting Root cuttings can be taken when parts of the vine have touched the ground and started to set out roots https://sharonsflorida.com/plants-page/native-vines/noyau-vine/

About the Region

Fall Symposium 2025 Logo - Teach for the Future

Salado, the location of our Fall 2025 Symposium, lies at the intersection of two ecoregions: the Edwards Plateau (Limestone Cut Plain) and Blackland Prairie (Northern Blackland Prairie).

The Edwards Plateau area is also called the Hill Country; however, this general term covers a much larger area extending farther north. Spring-fed creeks are found throughout the region; deep limestone canyons, rivers, and lakes (reservoirs) are common. Ashe juniper is perhaps the most common woody species found throughout the region. Additional woody species include various species of oak, with live oak (Quercus fusiformis) being the most common. Sycamores (Platanus occidentalis) and bald cypress (Taxodium distichum) border waterways. This area is well known for its spring wildflower displays, though they may be viewed in spring, late summer, and fall, as well. According to Texas Parks and Wildlife, average annual rainfall in the Edwards Plateau ranges from 15 to 34 inches.

The Blackland Prairie extends from the Red River south to San Antonio, bordered on the west by the Edwards Plateau and the Cross Timbers, and on the east by the Post Oak Savannah. Annual rainfall averages 30 to 40 inches, with higher averages to the east. This region is dominated by prairie species. The most common grass species include little bluestem (Schizachyrium scoparium) and Indian grass (Sorghastrum nutans) in the uplands and switchgrass (Panicum virgatum) in the riparian areas and drainages. Common herbaceous flowering plants include salvias, penstemons, and silphiums. This area has suffered greatly from overgrazing and agricultural use. Few intact areas remain, though many of the plants can be found along county roadsides throughout the region.

Our fall Symposium host chapter, the Tonkawa Chapter, includes both of these ecoregions.

Source: Wildflowers of Texas by Michael Eason