Trifolium nigrescens

Black Nascent clover ( Trifolium nigrescens ) - inflorescence

Black Nascent clover ( Trifolium nigrescens ) is a species of the genus clover ( Trifolium ). It is placed in the genus in the section Lotoidea, where she is part of the section Lotoidea, serial Lotoidea. The species has been bred into hybrids for agricultural use as animal feed.

Description

Black Nascent clover is an annual, herbaceous plant, reaching the heights of growth between 5 and 60 centimeters. The shoot axis is decumbent, ascending or erect. It is much branched and hairless or nearly hairless.

The leaves are, stalked, with the exception of the uppermost long. The leaves are dreifiedrig, the individual leaflets between 0.5 and 4 inches long and 0.3 to 2.5 inches wide. The spreading are ovate to almost triangular, narrowing towards the base. The leaf margin is finely denticulate. The tip is blunt or notched. The paper-like stipules are 4-20 mm long and triangular to lanceolate. The upper free part ends in an abrupt tip.

The inflorescences by measure 1 to 2 inches. They sit at long inflorescence axes that are longer than the leaves. They are spherical and consist of many loosely arranged individual flowers.

The cup is about 5 millimeters long and hairless or nearly hairless. It is tubular in shape in the lower part, of white color, and 5 - to 10 - irritating. The calyx teeth are shorter or longer than the calyx tube greenish and triangular to lanceolate. They are almost the same design and turn right at the fruit ripeness. The crown is 6-9 millimeters long and pink or white. When the fruit ripens it turns to yellow or brown. The flag is more than boats and wings.

The pulses are slightly longer than the cup tube. They are 1 - to 5 - SAMIg and elongated, slender. They are often constricted between the seeds. The seeds by measuring between 1.1 and 1.5 millimeters. They are brown in color.

The chromosome number was determined with 2n = 16. The flowering period extends from March to October.

System

Nascent Black Clover is provided within the genus in the section Lotoidea, where she is part of the section Lotoidea, serial Lotoidea. Successful and become economically significant is a hybrid Trifolium repens × nigrescens from white clover ( Trifolium repens ) and Schwarzwerdendem clover.

Dissemination

The distribution area of the Black Expectant clover is originally in the Mediterranean area, in the European and African littoral states as well as in Asia Minor. Neophyte reserves are found in the southeastern United States.

The species grows on fields and thickets in rocky, moist places.