FNPS Plant Database

Yucca filamentosa

Adam's needle, beargrass
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: Shirley Denton, Suncoast Chapter FNPS
  • Photo by: Mark Hutchinson, Hernando Chapter, FNPS
  • Photo by: Roger Hammer, Dade Chapter FNPS

Nomenclature

Common Name:

Adam's needle, beargrass

Synonym(s):

Yucca smalliana

Genus species:

Yucca filamentosa

Family:

Agavaceae

Plant Specifics

Form:

shrub

Size:

3-8 (12) ft tall by 3-4 ft wide

Life Span:

Long-lived perennial

Flower Color:

white

Fruit Color:

green

Phenology:

Evergreen, blooms early summer. Life span less than 50 yrs. (Nelson 2003).

Noted For:

Showy Flowers, Interesting Foliage

Landscaping

Recommended Uses:

Specimen plant. Low hedge.

Considerations:

The leaves have hard, sharp points.

Availability:

Native Nurseries, FNPS Plant Sales, Seed

Propagation:

Seed or cuttings.

Light:

Full Sun, Part Sun

Moisture Tolerance:

Always Flooded------------------------------------------------Extremely Dry

Coming Soon!

Somewhat moist, no flooding ---to--- Very long very dry periods

Salt Water Flooding Tolerance:

Unknown

Salt Spray/Salty Soil Tolerance:

Moderate. Tolerant of salty wind and may get some salt spray.

Soil or Other Substrate:

Sand

Soil pH:

Acidic to neutral

Suitable to Grow In:

8A,8B,9A,9B,10A,10B

USDA zones are based on the average annual extreme minimum winter temperature.



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Ecology

Wildlife:

Pollinators, Caterpillars, Hummingbirds

Larval host plant for cofaqui giant skipper ( Megathymus cofaqui ) and yucca giant skipper ( Megathymus yuccae ) butterflies. 





Pollinated by yucca moths.

  Provides wildlife cover

Native Habitats:

Dry sites. Scrub, scrubby flatwoods.

Natural Range in Florida:

Comments:

Ethnobotany:

Yucca fruit can be cooked and eaten after the seeds are removed; the large petals are used in salads. Fibrous leaves were pulled apart and used for making rope or twine.

General Comments:

Leaves have sharp spiny tips.

Citations:

https://pubmed.ncbi.nlm.nih.gov/10811791/#:~:text=Yucca moths are the only,larvae die in abscised flowers.

Minno, Marc and Maria Minno.  1999.  Florida butterfly gardening.  University Press of Florida, Gainesville.



Nelson, Gil.  2003.  Florida's Best Landscape Plants. Association of Florida Native Nurseries.



Osorio, Rufino. 2001. A gardener's guide to Florida's native Plants.  University Press of Florida, Gainesville, FL.



Watkins, John and Thomas Sheehan.  1975.  Florida Landscapt Plants, Native and Exotic. University Presses of Florida, Gainesville. (light, soil, salt)



University of Tennessee Extension Service.  Desired Ph Range and salt tolerance of common nursery plants.    https://extension.tennessee.edu/mtnpi/Documents/handouts/Fertility/Desired-pH-Range-List.pdf   accessed 2021.



Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. 2021. Atlas of Florida Plants ( http://florida.plantatlas.usf.edu /).  Institute for Systematic Botany, University of South Florida, Tampa.

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