Crop Production Lab 4

what is taxonomy based on?

Taxonomy is based on resemblance of structure, especially the structure of their flowers.

Poaceae

grass family, 2 ranked, narrow, parallel veined leaves. stems round or flattened with definite nodes and internodes. Flowers are simple without showy petals

Cyperaceae

Sedge family, similar to grasses, 3 ranked narrow leaves, stems lack nodes and internodes, and are triangular when cross sectioned.

Fabaceae

(Legume family): mostly compound and alternate leaves, trifoliate or pinnate, with a pair of stipules at base of petiole; flowers irregular with 5 petals; fruit a single-celled pod

Asclepiadaceae

(Milkweed family): leaves simple and opposite or whorled without stipules; most

species contain milky juice; fruit a long pod with seeds attached to tufts of floss.

Convolulaceue

(Bindweed family) plants vine, leaves alternately entire, and with a pair of basal lobes; flowers showy, fused into a tube.

‹Polygonaceae

(Buck wheat family) stems surrounded by a membranous sheath just above the node; leaves mostly alternate, simple and entire; flowers without true petals but with petal-like sepals.

Asteraceae

(Sunflower family) leaves mostly altermate, never compound, without stipules: flowers in

heads with numerous small flowers in each head.

Brassicaceae

(Mustard family): leaves usually alternate without stipules; flowers with 4 separate

petals, 4 separate sepals and 6 stamens.

Amaranthacede

(Pigweed Family) leaves usually alternate but may be opposite, simple without stipules; flowers small, without true petals, appear greenish, subtended by small bristly bracts.

Chenopodiaceae

(Lambsquarters family) very similar to pigweed family, but small greenish flowers, so not have bristly bracts