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          Ageratina havanensis (Shrubby boneset)
          Knight, Marilyn McBroom

          Ageratina havanensis

          Ageratina havanensis (Kunth) King & H. Rob.

          Shrubby Boneset, White Mistflower, White Shrub Mistflower, Havana Snakeroot

          Asteraceae (Aster Family)

          Synonym(s): Eupatorium havanense, Eupatorium texense

          USDA Symbol: AGHA4

          USDA Native Status: L48 (N)

          Havana snakeroot or mistflower is a rounded shrub, 2-6 ft. tall, with many much-branched stems arising from the base. Leaf blades triangular to roughly ovate or narrower, up to 3 inches long, with 3 main veins; margins wavy to coarsely toothed, tip pointed, and the base broadly tapered to almost perpendicular. Opposite leaves hang from fairly long leaf stalks. Prolific, long-lasting, fragrant, pinkish-white flowers occur in fuzzy, terminal, ageratum-like clusters. Fruit 1/5 inch long, with a crown of bristles on one end.

          Blooms best and appears bushier if severely cut back each winter. Drought tolerant. Adapt to most well-drained soils. May be transplanted year-round if cut back by one third.


          From the Image Gallery

          41 photo(s) available in the Image Gallery

          Plant Characteristics

          Duration: Perennial
          Habit: Shrub
          Leaf Arrangement: Opposite
          Leaf Complexity: Simple
          Leaf: Leaves often persist through winter.
          Size Class: 3-6 ft.

          Bloom Information

          Bloom Color: White , Pink
          Bloom Time: Apr , May , Jun , Jul , Sep , Oct , Nov , Dec


          USA: TX
          Native Distribution: Edwards Plateau in TX to n. Mex.; also Cuba and the Bahaman Islands
          Native Habitat: Found on rocky hillsides and bluffs in the southern half of the Hill Country. Well-drained sand, loam, clay, limestone. Rocky ravines; ledges; limestone hills

          Growing Conditions

          Light Requirement: Sun , Part Shade
          Soil Moisture: Dry
          Soil Description: Well-drained, rocky, limesone soils.
          Conditions Comments: White mistflower is ideal for a woodland edge. The white to pinkish-white flowers are fragrant and showy. White mistflower provides late summer and early fall color. Booms best and appears bushier if severely cut back each winter. Drought tolerant. Adapt to most well-drained soils. May be transplanted year-round if cut back by one third.


          Use Wildlife: Attracts hummingbirds, moths & butterflies. Butterflies and moths love the upright, fuzzy blooms.
          Conspicuous Flowers: yes
          Fragrant Flowers: yes
          Attracts: Butterflies , Hummingbirds
          Larval Host: Rawsons Metalmark
          Nectar Source: yes
          Deer Resistant: Moderate


          Propagation Material: Seeds , Semi-hardwood Cuttings , Softwood Cuttings
          Description: Easily grown from untreated seed. Higher germination occurs with fresh seed. Readily roots from softwood and semi-hardwood cuttings taken in summer or fall. Cuttings can be taken starting as early as April, and throughout the summer and early fall on plants that have been cut back. Gallons get woody after a year in a pot.
          Seed Collection: Collect achenes throughout fall when they have dried.
          Seed Treatment: Air-dry seed before storing in bags and refrigerate if storing the seed for long periods of time.
          Commercially Avail: yes
          Maintenance: Blooms best and appears bushier if severely cut back each winter. Drought tolerant. Adapt to most well-drained soils. May be transplanted year-round if cut back by one third.

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          Order seed of this species from Native American Seed and help support the Wildflower Center.

          Mr. Smarty Plants says

          Native plants for butterfly garden in Waco, TX
          February 03, 2008
          Few weeks ago I sent you a letter but never got an answer back. I would like to have your suggestions of native plants for a butterfly garden (30'x 30') here in Waco. The plants must be (1)drought ...
          view the full question and answer

          Native plants for seasonal poor drainage
          May 16, 2006
          I have an area in my front yard that has a drainage ditch running through it. When it rains, that area stays very wet. What kind of plants available for sale will work in this situation?
          view the full question and answer

          From the National Organizations Directory

          According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

          Lady Bird Johnson Wildflower Center - Austin, TX
          Texas Discovery Gardens - Dallas, TX
          Brackenridge Field Laboratory - Austin, TX
          NPSOT - Native Plant Society of Texas - Fredericksburg, TX
          Texas Parks and Wildlife Department - Austin, TX
          NPSOT - Fredericksburg Chapter - Fredericksburg, TX
          NPSOT - Austin Chapter - Austin, TX
          NPSOT - Williamson County Chapter - Georgetown, TX

          Herbarium Specimen(s)

          NPSOT 0983 Collected Nov 3, 1994 in Bexar County by Mike Fox
          NPSOT 0161 Collected May 22, 1991 in Bexar County by Lottie Millsaps

          2 specimen(s) available in the Digital Herbarium

          Wildflower Center Seed Bank

          LBJWC-630A Collected 2007-11-05 in Travis County by Lady Bird Johnson Wildflower Center

          1 collection(s) available in the Wildflower Center Seed Bank

          Additional resources

          USDA: Find Ageratina havanensis in USDA Plants
          FNA: Find Ageratina havanensis in the Flora of North America (if available)
          Google: Search Google for Ageratina havanensis


          Record Modified: 2018-03-07
          Research By: TWC Staff, mwj

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