The camera that took that birdsfoot picture cost .. almost Three Thousand Dollars!!
My little hundred buck one can’t .. Well you get the idea!?
http://en.wikipedia.org/wiki/Black_Medic
“Medicago lupulina is an annual or bi-annual plant, sometimes long-lived thanks to adventitious buds on the roots. The plant measures from 15 to 60 cm in height, with fine stems often lying flat at the beginning of growth and later erecting. The nodes bear three leaves, carried by a long petiole and have oval leaflets, partially toothed towards the tip. This species has very small yellow flowers are grouped in tight bunches. The fruit is a pod that does not open upon maturation, of a little arched form and bearing a single seed.
Note: it is sometimes confused with other plants that have small leaves divided into three leaflets and small yellow flowers, such as members of:
the clover genus, like Hop Trefoil and Lesser Hop Trefoil
the false shamrock genus, like Yellow Woodsorrel
“
There are some pictures there also.