GLOSSARY 691 



Operculum. A lid or cover which separates by a transverse line of 



division. 

 Opt. Abbreviation for Optimum. 

 Ostiolate. Bearing an ostiole. 

 Ostiole. An opening or mouth. 

 Oval. Broadly elliptic. 



Ovate. Shaped hke a longitudinal section of a hen's egg. 

 Ovoid. Resembling an egg. 



Pannose. Felt-like. 



Papilla (ae). Soft superficial protuberances. 



Papillate. Having papillae. 



Papillifonn. Shaped like a papilla. 



Papilloid. Resembling a small nipple. 



Paraphysate. With paraphyses. 



Paraphyses. Sterile filaments occurring in the fructification of crypto- 

 gams. 



Parasite. An organism living on or in and at the expense of another 

 living organism (the host). 



Patellate. Shaped like a patella. 



Patelliform. Like a small dish, circular and rimmed. 



Pedicel. The support. 



Pedicellate. Borne on a pedicel. 



Pellicle. A small skin; a delicate superficial membrane. 



Pellucid. Wholly or partially transparent. 



Penicillate. Like a little brush. Pencil-shaped. 



Perforate. Pierced through. 



Peridium. The outer enveloping coat of a sporangium. 



Periplasm. The protoplasm in the oogonium and the antheridium 

 which does not share in conjugation. 



Peiithecium. A rounded, oval, pjrriform or beaked structure in which 

 asci are borne. 



Peiitrichiate. With hairs from all of surface. 



Persistent. Remaining till the part which bears it is wholly matiured. 



Phycochrome. The coloring matter of brown Algse. 



Phyllogenous. Growing upon leaves. 



Phytogenous. Growing on plants. 



Pileate. Having the form of a cap. 



Pileiform. Pileus-shaped. 



PUeus. Cap. The dome-shaped part of a sporophore. 



