Pachypodium (Apocynaceae) :  taxonomy, habitats and cultivation / 
S.H.J.V. Rapanarivo...[et al.] 
 - Rotterdam :  A.A. Balkema,  1999 
 - vii, 120 p. :  ill. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pachypodium<br/>Herbaria<br/>Herbarium material