Nowicke, Joan W. <br/><br/>
Pollen morphology and the relationship of the Plumbaginaceae, Polygonaceae, and Primulaceae to the order Centrospermae / 
Joan W. Nowicke and John J. Skvarla 
 - Washington :  Smithsonian Institution Press,  1977 
 - iii, 64 p. :   ill. ;   26 cm. 
 - Smithsonian contributions to botany  Number 37 .
<br/><br/>Bibliography: p. 15-16. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plumbaginaceae--Classification<br/>Polygonaceae--Classification<br/>Primulaceae--Classification<br/>Centrospermae--Classification<br/>Plumbaginaceae--Pollen--Morphology<br/>Polygonaceae--Pollen--Morphology<br/>Primulaceae--Pollen--Morphology<br/>Centrospermae--Pollen--Morphology<br/>Palynotaxonomy