GLOSSARY. 271 



OnoVATE. — The reverse of ovate. 



Oiri'USE.— Blunt ; without point. 



Orbicular.— Circular. 



Ovate. — Egg-shaped ; the broadest part near the base. 



Paleaceous.— Clothed with chaff. 



Palmate. —With spreading divisions, like the lingers of the hand. 



Panicle. — A cluster of fruit in which the stems branch more or less. 



Papyraceous.- Paper-like. 



Pedicel, — A tiny stalk; especially the stalk of the sporangium. 



Peduncle. — A stalk ; especially the stalk of the fruiting parts in 



Lycopodiuni . 

 Peltate. — Shield-shaped ; said of scales and indusia that are 



attached to the frond by their centres. 

 PliRSlSTENT. — Not falling away ; remaining on the plant. 

 Petiole. — Same as stalk and stipe. 



Pinna (Pl. Pinn.E). — One of the primary divisions of a frond. 

 Pinnate. — Consisting of several leaflets arranged on each side of a 



common petiole or rachis. 

 PiNNATlFlD. — Divided in a pinnate manner, but with leaflets not 



entirely separate. 

 Pinnule. — One of the small divisions of a pinnate leaf. 

 Procumbent. — Lying along the ground. 

 Proliferous. — Giving rise to new plants. 

 Prothalliujm (Pl. Prothallia). — The minute scale-like growth 



from the spore of a fernwort. 

 Pubescence. — A covering of soft, short hairs. 

 Pubescent. — Covered with fine, soft hairs. 

 OUADRIPINN VTE.— Four times pinnate. 



Rachis. — The continuation of the stipe through a compound frond. 

 Receptacle. — The part of the frond to which the sporangia are 



attached, especially in the filmy ferns. 

 Reflexed. — Abruptly bent downward or backward. 

 Renifor.m, — Kidney-shaped. 



RiiVOLUTE. — Rolled backward, as the margins of some fronds. 

 Rhizome. — An underground stem ; a rootstock. 

 RnoTSTOCK. — Same as rhizome. The portion that produces the 



fronds or stems in most of our species. 

 Scales. — The chaff on the stems of ferns. 



