Smooth Threadleaf Ragwort
(Senecio flaccidus var. monoensis)
Smooth Threadleaf Ragwort (Senecio flaccidus var. monoensis)
/
/

Jim Morefield
CC BY 4.0
Image By:
Jim Morefield
Recorded By:
Copyright:
CC BY 4.0
Copyright Notice:
Photo by: Jim Morefield | License Type: CC BY 4.0 | License URL: http://creativecommons.org/licenses/by/4.0/ | Rights Holder: Jim Morefield | Publisher: iNaturalist | Date Created: 2019-06-22T10:17:42-07:00 |

































































Estimated Native Range
Summary
Senecio flaccidus var. monoensis, commonly known as Smooth Threadleaf Ragwort, is an evergreen perennial subshrub or herb. It is native to arid and semi-arid regions, including desert scrub, rocky slopes, and open plains in the Southwestern United States and Northwest Mexico. It typically grows to a height of 2-3 feet (0.6-0.9 meters) and a width of 1-3 feet (0.3-0.9 meters). The plant has a sprawling habit with flexible stems and narrow, thread-like leaves that give it a delicate texture. It produces bright yellow, daisy-like flowers in the spring and summer, which are moderately showy and attract pollinators.
Smooth Threadleaf Ragwort is valued for its drought tolerance and ability to thrive in challenging environments, making it suitable for xeriscaping and naturalistic plantings. It is often used in rock gardens, as a ground cover, or in borders where its fine foliage can contrast with bolder plants. This plant prefers full sun exposure and requires minimal water once established, thriving in well-drained soils. While it is generally low-maintenance, it can be susceptible to root rot if overwatered. It is also important to note that many Senecio species contain toxic alkaloids, so caution should be exercised if planting in areas accessible to pets or livestock.CC BY-SA 4.0
Smooth Threadleaf Ragwort is valued for its drought tolerance and ability to thrive in challenging environments, making it suitable for xeriscaping and naturalistic plantings. It is often used in rock gardens, as a ground cover, or in borders where its fine foliage can contrast with bolder plants. This plant prefers full sun exposure and requires minimal water once established, thriving in well-drained soils. While it is generally low-maintenance, it can be susceptible to root rot if overwatered. It is also important to note that many Senecio species contain toxic alkaloids, so caution should be exercised if planting in areas accessible to pets or livestock.CC BY-SA 4.0
Plant Description
- Plant Type: Subshrub, Herb
- Height: 2-3 feet
- Width: 1-3 feet
- Growth Rate: Moderate
- Flower Color: Yellow
- Flowering Season: Spring, Summer
- Leaf Retention: Evergreen
Growth Requirements
- Sun: Full Sun
- Water: Low
- Drainage: Fast
Common Uses
Bee Garden, Butterfly Garden, Drought Tolerant, Low Maintenance, Rabbit Resistant, Showy Flowers
Natural Habitat
Native to arid and semi-arid regions, including desert scrub, rocky slopes, and open plains
Other Names
Common Names: Mono Groundsel, Mono Ragwort, Green Groundsel
Scientific Names: , Senecio flaccidus var. monoensis, Senecio douglasii var. monoensis, Senecio monoensis, Senecio pectinatus, Senecio filicifolius, Senecio lathyroides,
GBIF Accepted Name: Senecio flaccidus var. monoensis (Greene) B.L.Turner & T.M.Barkley