Fragrant Mistflower (Ageratina havanensis)
Fragrant Mistflower (Ageratina havanensis)
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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
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.
Plant Characteristics
Habit: Shrub
Leaf Arrangement: Opposite
Leaf Complexity: Simple
Size Notes: Up to about 6 feet tall.
Leaf: Leaves often persist through winter.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Time: Apr , May , Jun , Jul , Sep , Oct , Nov , Dec
Distribution
USA: TXNative 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 ShadeSoil 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.
Benefit
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: Rawson's Metalmark
Nectar Source: yes
Deer Resistant: Moderate
https://www.wildflower.org/plants/result.php?id_plant=AGHA4
Image Information
Photographer: Schroeder, SusanCity: Vanderpool
County: Bandera
State: TX
Location Notes: Lost Maples State Natural Area, Maple Trail
Accession date: 2025-09-08
Filename: SMS_IMG0099.JPG
Slide Index: SMS_AGHA4-20171104-04.jpg
Restrictions: Unrestricted
Collection: Wildflower Center Digital Library
Original Format: Digital
Orientation: Portrait
Shot: Close-up of an inflorescence.
Date Taken: 2017-11-04
NPIN Image Id: 184158
