Marine. Growing within the influence of the sea or immersed in its water. 



Maritime. Occurring in an area near the sea that is strongly influenced by envi- 

 ronmental conditions imposed by the sea. 



Marsh. A tract of wet or periodically inundated treeless land, usually character- 

 ized by grasses, cattails or other monocots. 



Massula (-ae). A group of cohering pollen grains produced by one primary 

 mother cell, as in the orchids; pollen mass. 



Medifixed. Fixed or attached by the middle. 



Megasporangium. The sporangium in which megaspores are developed or con- 

 tained. 



Membranous. Having a thin, soft, pliable texture. 



Mericarp. One of the two seedlike carpels of an umbelliferous fruit. 



Meristem. An area of actively dividing and growing cells, as at stem and root 

 tips. 



-merous. A suffix indicating the number of members in any given structure or 

 whorl, such as a whorl of flower parts; for example, 5-merous or few-merous. 



Mesic. Characterized by or pertaining to conditions of medium moisture supply. 



Mesophyte. A plant that grows under m.edium moisture conditions. 



Micro-. Greek prefix meaning small. 



Microsporangium. The organ in which microspores are produced. 



Midrib. The conspicuous central vein in the vascular system of an appendage. 



Monadelphous. Having the stamens united into a single structure. Compare Dia- 

 delphous. 



Moniliform. Constricted so as to simulate a string of beads (fig. 786) . 



Monochasium -a (pi.). A one branched cyme, either pure or resulting from the 

 reduction of cymes. 



Monocotyledon. A plant the seeds of which bear only one cotyledon. 



Monoecious. Having the stamens and pistils in different flowers on the same 

 plant. 



Mucro. A sharp, abrupt point or spiny tip. 



Mucronate. Said of appendages that come to an abrupt point (fig. 787). 



Mucronation. The abrupt point of an appendage. 



Mucronulate. Coming to a small, abrupt point. 



Muricate. Having a rough surface texture owing to many small, sharp projections 

 (fig. 459). 



Muticous. Pointless, blunt, awnless. 



Naked. Without vestiture of any kind. 



Naturalized. Of foreign origin, but established and reproducing itself as though a 



native. 

 Nectariferous pit. A depression or cavity bearing nectar, which may occur on a 



sepal, petal, or stamen (fig. 463). 

 Nerve. A vein. 



Net-veined. Having the veins intricately branched and anastomosing. 

 Node. The region on the stem where a leaf or leaves occur. 

 Nodose. With knobs or knots. Nodulose: the diminutive. 

 Nut. An indehiscent, one-seeded fruit from more than one carpel and having a 



woody coat. 



Ob-. Latin prefix signifying the reverse or contrariwise. 



Obcompressed. Flattend at right angles to the radius of the axis. 



Obcordate. Heart-shaped, with the notched part away from the point of attach- 

 ment (fig. 787). 



Oblanceolate. Pointed at the apex, broadest above the middle, and tapering to the 

 base (fig. 787). 



1720 



