Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Ageratum houstonianum
FAMILY
Asteraceae__
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Ageratum at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Ageratum houstonianum
FAMILY
Asteraceae__
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2015)
Ageratum houstonianum
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Ageratum houstonianum
COMMON NAME:
Ageratum, Floss-flower
To see larger pictures, click or hover over the thumbnails.
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Keith Bradley kab_a_houstonianum_72756
February Miami-Dade County FL
Stems erect to decumbent, sparsely to densely pilose, per Flora of North America.
)
Keith Bradley kab_a_houstonianum_72761
February Miami-Dade County FL
Flower heads in dense to open, cymiform to corymbiform arrays, per Flora of North America.
)
Keith Bradley kab_a_houstonianum_72843
March Miami-Dade County FL
Leaf blades deltate to ovate, mostly 3-8 × 2.5-4cm, margins toothed, per Flora of North America.
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Ageratum houstonianum
FAMILY
Asteraceae__
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Ageratum houstonianum
FAMILY
Asteraceae__
SYNONYMOUS WITH
Floristic Synthesis of North America. BONAP (Kartesz, 2015)
Ageratum houstonianum
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Ageratum houstonianum
3850
Forb
Annual
Habitat: Wet, disturbed areas, per Weakley's Flora
Non-native: southeast Mexico, Central America (apparently)
Waif(s)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Opposite
FLOWER:
Summer
Disc: Lavender
(rarely white)
Rays: Absent
Inferior ovary
FRUIT:
Summer?
TO LEARN MORE about this plant, look it up in a good book!
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".