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Flaigg, Norman G.
Ageratina havanensis (Kunth) King & H.E. Robins.
Havana snakeroot, Mistflower, Shrubby boneset, White mistflower, White shrub mistflower
Synonyms: Eupatorium havanense
USDA Symbol: AGHA4
USDA Native Status: Native to U.S.
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.
Bloom InformationBloom Color: White , Pink
Bloom Time: Oct , Nov
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 USDA Native Status: L48(N)
Growing ConditionsLight Requirement: Sun
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.
BenefitUse 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
PropagationPropagation 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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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 ...
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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?
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From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Lady Bird Johnson Wildflower Center
- Austin, TXTexas Discovery Gardens
- Dallas, TXBrackenridge Field Laboratory
- Austin, TXNative Plant Society of Texas
- Fredericksburg, TXTexas Parks and Wildlife Department
- Austin, TXNPSOT - Fredericksburg Chapter
- Fredericksburg, TXNPSOT - Austin Chapter
- Austin, TXNPSOT - Williamson County Chapter
- Georgetown, TX, TX
Herbarium Specimen(s)NPSOT 0161
Collected May 22, 1991 in Bexar County by Lottie MillsapsNPSOT 0983
Collected Nov 3, 1994 in Bexar County by Mike Fox
Wildflower Center Seed BankLBJWC-630A
Collected 2007-11-05 in Travis County by Lady Bird Johnson Wildflower Center
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Record Modified: 2009-04-18
Research By: TWC Staff, mwj