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Guilleminea densa - small matweed

Scientific Family
Amaranthaceae
Synonyms
Guilleminea densa var. densa, Guilleminea densa var. aggregata
Plant type
Forbs and Subshrubs
Origin
Native
Lifecycle
Perennial
Similar species
Alternanthera caracasana
Height
2 inches
Riparian
No

Perennial mat-forming forb with numerous stems from a thick root.

Numerous stems are flat to the ground, hairy, greenish to reddish in color, and form dense, spreading mats. Tiny flowers are in dense, in mounded, poorly defined clusters.

Habitat

Found on dry soil in disturbed areas.

Plant Community
Disturbed Areas
Low elevation
2500
High elevation
6000

Flower Characteristics

Dense kidney-shaped structures at base of flower; flower bracts (sepals) about 1/16 inch, lobes bent backward, erect in age, tip sharp to rounded, mid-vein ending before tip; filament tube <1/16 inch. Flowers in dense sessile clusters in leaf axils.

Flower color
Yellow-white
Flower shape
Regular
Tubular
No
First bloom month
June
Last bloom month
October
Flower clusters
Rounded

Leaf and Stem Characteristics

Basal leaves in rosettes, often deciduous; stem leaves are oval to round, woolly beneath, smooth or sparsely silky above, 1/8 to 3/4 inch long and sharp to blunt at their tips.

Leaf type
Simple
Leaf color
Green
Leaf shape
Round or oval
Leaf margin
Smooth
Leaf attachment
Basal & Opposite
Leaves clasp
No
Leaf hairs
Leaves & stems
Spines
No

Fruit and Seed Characteristics

Fruit is small, bladder-like and thin-walled fruit (utricle), does not split open at maturity.

Fruit type
Other
Fruit color
Brown

Lens-shape to spherical, smooth, <1/16 inch, red-brown.