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Fabaceae-Caesalpinioideae family

Chamaecrista glandulosa (Linnaeus) Greene var. swartzii (Wikström) H. S. Irwin & Barneby in & Barneby, Mem. New York Bot. Gard. 35(2): 784.  1982.
Bas.: Cassia swartzii Wikström (1826). 

Ti tanmawen
West Indian endemic.
Very common shrub (almost prostrate on cliffs) of semi-open and open spots in dry areas.
Anguilla, Barbuda, Antigua, Saba, St. Eustatius, St. Kitts, Montserrat, Guadeloupe, La Désirade, Marie Galante, Dominica, Martinique, St. Lucia, St. Vincent, the Grenadines, Grenada, rest of West Indies.

FLA lists another species Chamaecrista obcordata. It describes the prostrate form in the images below. Rupert Barneby's monograph re Chamacrista obcordata states "We suspect that field observation may show C. obcordata to be little more than a local paucifoliate glaucescent variant of C. glandulosa var. swartzii".
I agree.

Normal form
     

Prostrate form