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Weed Identification

corn gromwell

Family

Boraginaceae

Scientific Name

Buglossoides arvensis

Other Common Names:

puccoon

Synonyms (former Scientific Names):

Lithospermum arvense

Habit

This slender erect annual flowers from March to June.

Leaves

Leaves are linear or lanceolate, 1.5 to 6 cm in length, and 2 to 15 mm wide. The leaves are hairy on both surfaces, and lack petioles. The topmost leaves also tend to be smaller than lower leaves.

Identifying Characteristics

When there are several stems, the central one is usually the largest.

Flower Seed Head

Bluish-white flowers grow from the leaf axils of the upper leaves. Flowers are funnel shaped, ranging from 2 to 4 mm in diameter. The flowers are closely packed in the inflorescence, but become more widely spaced as they become fruit.

Seed Fruit

The seeds are grayish brown, dull, ovoids generally 3mm in length.

Where Found

An introduced species from Eurasia, this plant can be found growing in sandy fields, roadsides, and waste places.

Growth Habit

upright and nonwoody

Thorns or Spines

not present

Approximate Flower Diameter

pencil

Dominant Flower Color

Varies: 
white
blue

Flower Symmetry

not symmetrical

Leaf Hairs

has hairs

Leaf Shape

lance

Leaf Arrangement

alternate

Leaf Margin

entire

Leaf Structure

simple

Leaf Stalk

none

Stem Hairs

has hairs

Stem Cross Section

round or oval

Milky Sap

not present

Root Structure

Varies: 
fibrous
taproot

Life Cycle

winter annual

Ochrea

not present

Plant Type

Herb