12 



PUBLIC HEALTH BULLETIN NO. 286 



Pistillate. — With or pertaining to pistils. 



Pollen. — The usually yellow grains contained in the anther. 



Procumbent. — Lying or crawling along the ground. 



Proliferous. — Producing ofiF-shoots. 



PuBERULENT. — With minute hairs. 



Pubescent. — Covered with hairs, often short and downy (fig. 75). 



Punctate. — With small dots, which can often be seen only with a lens (fig. 76). 



Raceme. — A flower cluster with the flowers stalked and coming off a common 



and more or less elongated axis (fig. 77). 

 Rachilla. — A secondary inflorescence rachis. 

 Rachis. — The axis of an inflorescence (fig. 77) . 



Ray-flowers. — The flat marginal flowers of the head in the Compositae. 

 Recurved. — Curved backwards or toward base. 

 Regular. — Pertaining to flowers; flowers radially symmetrical. 

 Reniform. — Kidney -shaped (fig. 78). 



^ 



^ 



\ 



Rachis — 



N 



/' 



Figure 75. 



Figure 76. 



Figure 77. 



Figure 78. 



Reticulate. — With a network-like surface (fig. 79). 



Revolute. — Appearing as if rolled back from the margins (fig. 80). 



Rhizome. — A prostrate or underground stem. 



Rosette. — With the leaves clustered symmetrically around the base of the stem 



or scape (fig. 81). 

 Sagittate. — Like an arrowhead, with the lobes turned downward (fig. 82). 



Figure 79. 



Figure 80. 



Rosette^ 



Figure 81. 



Scape 



Figure 82. 



