Grooved Nipple Cactus

coryphantha sulcata

The Grooved Nipple Cactus (Coryphantha sulcata) is a captivating, low-growing succulent native to the limestone hills, rocky prairies, and arid brushlands of Texas and northern Mexico. Known for its clumping habit, this plant eventually forms dense, mounded colonies composed of numerous spherical to cylindrical stems. The species gets its distinctive common name from the prominent, nipple-like tubercles that cover its body, each marked by a noticeable longitudinal groove along its upper surface. In the heat of late spring and early summer, this resilient cactus produces magnificent, large yellow blossoms with striking reddish throats. These showy flowers open only during the sunniest hours of the day, acting as vital beacons for native desert pollinators. Well-adapted to drought, this cactus is a testament to the endurance of desert life, storing moisture in its fleshy tissues and warding off herbivores with clusters of sharp, radiating spines. Discover and identify species like Grooved Nipple Cactus with the Snappit app.

Habitat: Found in rocky limestone soils, dry grasslands, and desert scrublands of Texas and northern Mexico.

Appearance

This small succulent features spherical to short-cylindrical green stems measuring 4 to 12 centimeters in height, which frequently produce offsets to form clusters up to 30 centimeters wide. The surface is covered in prominent, finger-like tubercles that feature a distinct, deep groove on the upper side. Each tubercle is tipped with an areole holding a cluster of 8 to 15 radial spines that are translucent white to yellow, and 1 to 3 central spines that are slightly stouter and darker. The funnel-shaped flowers are large and showy, measuring up to 6 centimeters across, displaying bright yellow petals that transition to a deep orange or red throat, and are followed by green, fleshy, egg-shaped fruits.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderCaryophyllalesFamilyCactaceaeGenusCoryphantha

Grooved Nipple Cactus

Interesting facts

The characteristic grooved feature on the tubercles only begins to develop once the cactus reaches its reproductive adult stage.

The genus name Coryphantha translates from Greek as 'summit flower,' referring to the way its blooms burst directly from the top of the plant.

Unlike many desert cacti that bloom repeatedly, individual flowers of the Grooved Nipple Cactus typically open for only a few hours during the hottest parts of the day.

Special abilities

Its fleshy stem contains specialized mucilage tissues that efficiently store and retain water, enabling the plant to survive prolonged periods of extreme drought.

The deep longitudinal grooves on the tubercles act as natural channels, directing morning dew and sparse rain straight down to the root zone.

Its dense array of sharp radial and central spines deters thirsty herbivores while casting micro-shadows that reduce the surface temperature of the stem.

Measurements & details

Length: 4-15 cm
Weight: 0.1-1.5 kg
Lifespan: 10-30 years

Diet & Feeding

As a photoautotrophic plant, it manufactures its own energy from sunlight, carbon dioxide, and water via photosynthesis, absorbing essential nutrients and moisture through its shallow root system.

Primary Foods

Sunlight
Carbon dioxide
Water
Soil minerals

Ecological connections

mutualism

Cactus Bee

Diadasia rinconis

Pollinates the bright yellow flowers while collecting pollen and nectar to feed its brood.

eaten by

Desert Cottontail

Sylvilagus audubonii

Gnaws on the fleshy stems and eats the green, fleshy fruits during dry winter months when food is scarce.

Traits

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Also known as

No aliases listed yet.

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Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Grooved Nipple Cactus?

The easiest way to identify Grooved Nipple Cactus is to use the Snappit nature identifier app.

How long is Grooved Nipple Cactus?

4-15 cm

How much does Grooved Nipple Cactus weigh?

0.1-1.5 kg

How long does Grooved Nipple Cactus live?

10-30 years

What does Grooved Nipple Cactus eat?

As a photoautotrophic plant, it manufactures its own energy from sunlight, carbon dioxide, and water via photosynthesis, absorbing essential nutrients and moisture through its shallow root system.

Where is Grooved Nipple Cactus usually found?

Found in rocky limestone soils, dry grasslands, and desert scrublands of Texas and northern Mexico.