10 



PtJBLiC HEALTH BULLETIN NO. 286 



Longitudinal. — Along the long axis of a structure. 

 Membranous. — With membrane-like texture. 



Midrib. — Main rib of normal leaf running from base to apex (fig. 55). 

 MucRONATE. — Ending in an abrupt, fine, slender tip (fig. 56). 

 Nodes. — The places on the stems that normally bear leaves (fig. 57) . 

 Nodose. — Knotty or knobby. 



Oblanceolate. — Lanceolate in outline but with the broadest part toward the 

 apex (fig. 58). 



Midrib 



Figure 55. 



Figure 56. 



Nodes 



Figure 57, 



Figure 58. 



Oblong. — Longer than broad and with nearly parallel sides (fig. 59). 



Obovate. — Ovate in outline but with the broadest portion toward the apex 



(fig. 60). 

 Obpyramidal. — Shaped like a pyramid with the broad end uppermost (fig. 61). 

 Obtuse. — Blunt or rounded at the tip (fig. 62). 



Figure 59. 



Figure 60. 



Figure 61. 



Figure 62. 



Ogre A. — A tubular sheath present on the stem just above the base of the leavet 

 of docks and smartweeds. It is formed of -the fused stipules (fig. 63). 



OcREOLAE. — Small ocrea-like structures on the rachis of the flower clusters 

 in Polygonum. 



Opposite. — Coming ofif opposite each other at the same level on the axis (fig. 64). 



Orbicular. — Circular or round (fig. 65). 



Ovary. — The basal portion of the pistil in which the seeds or ovules are borne 

 (fig. 66). 



Ocrea \J^ 



Ovary. 



Figure 63. 



Figure 64. Figure 65. 



Figure 66. 



