362 GLOSSARY 



PiNNATiFiD (Lat. findo, Jidi, to cut), pinnatoly cut. 



PiSTiLLAii (I jat. j^istillnyti, a postlc), club-shaped. 



PisTiLLAiu-RACiLLAii, torin applied to spermatia which are oblong aud 

 slightly thicker at the ends, 



Placodioid, like tlio genus IHacodium, witli the thallus orbicular, ad- 

 pressed, lobed at the circumfereuce. 



Platygonidia (Gr. plains, broad, (jonos, offspring), gonidia in broadly 

 spreading groups {Ceplialcuros). 



Platypiiyllous {(jv. plains, hvoad, phullon, a leaf), broadly lobed. 



Plicate (L&t. pUco, to fold), folded in plaits — Pliciform. 



Pluri-, Latin prefix signifying many. 



Plurilocular, niany-ccUed, 



PoDETiUM (Gr. pons, podos, a foot), a stalk-liko thalline elevation support- 

 ing an apothecium. 



PoLARi-BiLocuLAR, of two-cclled sporss with a thick central wall traversed 

 by a connecting tube, the lumen of the colls at the extreme ends. 



Poly-, Greek prefix signifying many. 



Polymorphous (Gr. polus, many, morphc, a change), with several or 

 various forms. 



PoLYPHYLLOUS (Gr. polus, mauT, j)/i«ZZon, a leaf), many-leaved. 



Proliferous (Lat. proles, offspring, fero, to bear), bearing offshoots. 



Proper margin, the rim or margin encircling the apothecium, as distinct 

 from the thalline margin. 



Protococcoid, like the genus Protococcus. 



Pruina (Lat., hoar frost), powdery secretion or bloom on the surface of 

 plants — Pruinose. 



PsEUDO- [Gr. pseudos, false), used as a prefix signifying false or spurious. 



PuLVERACEO-DELiTESCENT (Lat. pulvis, powder, delitesco, to lie hid), 

 covered with a layer of powdery granules. 



Pulverulent {Lsht. pulvis, powder), jDowdery. 



PuLViNATE (Lat. pulvinatus, cushion-shaped), thallus growing in cushion- 

 like masses. 



PuLViNULUS, a small cushion-like outgrowth. 



Pycnide (Gr. puknos, dense), a closed fructification containing stylo- 

 spores. 



Pyrenium (Gr. puren, a kernel), the outer wall of a perithecium or 

 sometimes of a fructification. 



Pyrenocarp (Gr. carpos, fruit), a closed fructification (perithecium) opening 

 above by a pore or slit. 



Pyrenodeine (Pyrenodine), (Gr. eidos, like), a term applied to perithocia 

 — Pyrenoid. 



Pyrenopsidian, similar to the genus Pyrenopsis. 



Pyriform (Lat. pynis, a pear), pear-shaped. 



Kadiate (Lat. radius, a ray or the spoke of a wheel), spreading outwards 



from a centre. 

 Radius, Radii, the outermost lobes or squamules. 

 Ramose (Lat. ramus, a branch), branching. 

 Ramuli, brauchlets or secondary branches. 

 Raphides (Gr. rapids, a needle), needle-shaped crystals. 

 Receptacle (Lat. rcceptaculum, a reservoir), term used for the base or 



surrounding tissue of the apothecium. 

 Reniform (Lat. renis, a kidney), kidney-shaped. 

 Repand (Lat., bent backwards), with an uneven margin, less so than 



sinuous. 

 Reticulate (Lat. retc, a net), resembling a net-work. 

 Retuse (Lat. rclusus, blunted), with a shallow notch in a rounded apex. 

 Revolute (Lat. re, back, volvo, to roll), rolled back from the margin or 



apex. 

 Rhagadiose (Gr. rhagas, a chink), cracked or fissured. 

 Rhizina, pi. Rhizin-E (Gr. rhiza, a root), root-like strands or hairs. 



