690 GLOSSARY 



Membranous. Membranaceous. Thin and semi-transparent, like a 

 fine membrance. 



Medullary. Relating to the pith, pithy. 



Micro. To signify small, little. 



Microsporangium (a). A sporangium which produces microspores. 



Mon. In Greek compounds to signify one. 



Monopodium (a). An axis which continues to grow at the apex in 

 the direction of previous growth, while lateral structures of like 

 kind are produced beneath it in acropetal succession. 



Monosporic. Bearing one spore. 



Monostichous. In a single vertical row. 



Mucose. Slimy. 



Multi. A Latin element signifying many or much. 



Muricate. Rough with short hard excrescences. 



Muriculate. Diminutive of Muricate. 



Murifonn. With cells resembling bricks in a wall, with both longitudi- 

 nal and transverse septa. 



Muticous. Muticate. Pointless, blunt. 



Mycelium. Vegetative portion of thallus of fungi composed of one or 

 more hyphse. 



Myzamceba (se). Swarm-cells with purely amoeboid creeping motion. 



N 



Nodose. Knotty or knobby. 

 Nodule. A small knot or rounded body. 



O. A sjrmbol for the pycnial stage of the rusts. 



Ob. As a prefix meaning inversely or oppositely. 



Obese. Excessively fat; fleshy. 



Obligate. Necessary, essential. Comp. Facultative. 



Obsolete. Wanting or rudimentary. 



Ochraceous. Ocher-colored, yellow with a tinge of red. 



Olivaceous. The color of a ripe olive. 



Oogonium. Female sexual organ, containing one or more oospheres. 



Oosphere. Naked mass of protoplasm which, after fertilization, develops 



into the oospore. 

 Oospore. Immediate product of fertilization of oosphere. 

 Opalescent. Reflecting an iridescent light. 

 Operculate. Furnished with a lid. 



