Britton, Nathaniel Lord,  1859-1934. <br/><br/>
The genus Epiphyllum and its allies, 
by N. L. Britton and J. N. Rose. 
 - Washington,  Govt. print. off.,  1913. 
 - v, 255-262, vii p.  pl. 78-84.  25 cm. 
 - Smithsonian institution. United States national museum. Contributions from the United States national herbarium.  v. 16, pt.9 .
<br/><br/> "Bulletin of the United States national museum : issued June 6, 1913." 
<br/><br/><label>LCCN: </label>agr13001419  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epiphyllum.
<br/><br/><label>LC Class. No.: </label>QK1  / .U5 vol. 16, pt. 9