Weeds Lab 9/24

Question 1

Answer 1

Wild strawberry
Rosaceae
CP
Sd, Stn

trifoliate (three leaflets) weed that spreads by aggressive stolons. The leaves and fruit of wild strawberry are smaller than that of its cultivated cousin.

five rounded white petal flowers,
sharp-toothed leaves in groups of three
stems are very hairy

Question 2

Answer 2

Oldfield Cinquefoil
Rosaceae
CP
Stn, Sd

alternate, palmate compound, 5 to 7 leaflets; leaflets oblanceolate to obovate, toothed, whitish below

5-petaled, yellow, petals notched, long stalked; solitary, axillary

Question 3

Answer 3

Red sorrel
Polygonaceae
CP
Rz, Sd

distinctive arrowhead-shaped leaves and red flowering stems.

Stems are ridged and often maroon-tinted.

Flowers Occur in clusters on the flowering stems. Flowers can be either yellowish-green in color (male) or red to maroon in color (female).

Question 4

Answer 4

Annual bluegrass
Poaceae
A
Sd

clump-forming annual grass, Light green in color.

Leaves are ‘keeled’ and have a distinctive boat-shaped tip. The ligule is slightly pointed and membranous. Leaf sheaths are somewhat compressed and flattened, without hairs.

Question 5

Answer 5

Vetches
Fabaceae
species vary
Sd, Rz

The leaves that are divided into 8 to 16 leaflets, the distinct stipule that occurs at the base of the leaf petiole, and the climbing or trailing growth habit

Question 6

Answer 6

Red clover
Fabaceae
SP
Sd

The trifoliate leaves and pink to red flowers are both key features that help in the identification of red clover.

Larger than White Clover

3 leaflets (trifoliate). Each leaflet is elliptic in outline, approximately 1/2 to 1 1/4 inches long and about half as wide. Leaves are usually hairy on both surfaces or sometimes without hairs above and hairy beneath. Each leaf usually has a light green or white ‘V-shaped’ marking.

Question 7

Answer 7

Birdsfoot trefoil
Fabaceae
SP,CP
Sd, Rz,Stn

Pinnate leaf arrangement. Brown to purple seed pods radiate from stem branch, resemble bird’s foot.

Has three terminal leaflets near the base of the stem, like stipules. Five oval leaflets, non-hairy. Flowers are bright yellow.

Question 8

Answer 8

Dandelion
Asteraceae
SP
Sd

Leaf margins are noticeably wavy, especially on older leaves. Leaves are oblong in outline, sometimes sparsely hairy, deeply indented with lobes that point toward the center of the rosette.

Question 9

Answer 9

Common Yarrow
Asteraceae
CP
Sd, Rhz, Stol

finely dissected leaves and white, flat-topped flowers.

Stems: May have white hairs or without hairs, usually unbranched

Question 10

Answer 10

Common Groundsel
Asteraceae
A
Sd

The deeply lobed leaves, yellow flowers, and ‘puff-ball’ seedhead are all characteristics that help in the identification of common groundsel.

Question 11

Answer 11

Common Catsear/
False dandelion
Asteraceae
SP
Sd

The rosette growth habit, irregularly lobed leaves, and bright yellow flowers