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Origin:
Native
Life Cycle:
Annual Similar Species: A. powelli, A. palmeri
General Desc:
Annual herb, stems erect, simple to branching, green or sometimes reddish-purple and hairy.
Identification notes: Flowering stems narrow, soft, lax, densely covered by small flowers in terminal and axillary clusters, bracts are <1/8 inch long. Plants are hairy (at least the upper parts). Stems, leaves and flower stems are green or sometimes reddish-purple.
Height:
To 6-1/2 feet
Habitat Description: Found on sandy soils on riverbanks, railroads, roadsides, agricultural and disturbed areas.
Plant Communities:
Riparian, Disturbed Areas
Elevation: 1000 - 8000 feet
Color:
Green, reddish or purple
Shape:
Regular in elongated clusters
Tubular:
Y
Flowering Period:
Jun - Oct
Description:
Terminal and axillary spikes, terminal are longer, many. Male and female flowers have 5 tepals (sepals/petals). Female tepals are lance-like, 1/16 to 1/8 inch, unequal, thin and soft, pointed. 5 stamened male flowers are at the ends of spikes.
Leaf Color:
Dark green
Leaf Type:
Simple
Leaf Shape:
Narrow
Leaf Margin:
Smooth
Leaf Attachment:
Alternate
Leaves Clasp:
N
Hairs:
Stems
Spines:
N
Leaf Description:
Stems to 6-1/2 feet often shorter, often reddish and hairy. Leaf blades egg to lance-shaped, pointed to rounded at tip, with narrow straight sides converging at the base, 3/4 to 4-3/4 inches long, 3/4 to 2-1/4 inches wide, leaf stems shorter than leaves.
Fruit Color: Black
Fruit Notes: Inflated and bladder-like (utricles), egg-shaped with the narrower end at the base, up to 1/16 inch long, smooth towards the base, opening along a transverse circular line to release seeds, top opening like a lid, lid wrinkled or warty.
Seed Notes: Seeds lentil-shaped to roughly spherical, <1/6 inch in diameter.
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