224 



The Fern Lover's Companion 



Panicle. A loose compound cluster of flowers 



or sporangia with irreaular stems. 



Pedicel. A tiny stalk, especially the stalk ot 



the sporangia. 



Pellucid. Clear, transparent. 



Persistent. Remaining on the plant for a long 



time, as le'aves through the wmter. 



Petiole. The same as stalk or stipe. 



Pinna. One of the primary divisions of a 



frond. 



Pinnate. Feather-like; with the divisions of 



the frond extending fully to the 

 rachis. 



Pinxatifid. Having the divisions of the frond 



extend halfwaj' or more to the 

 rachis or midvein. 



Pinnule. A secondary pinna. Inabipinnate 



frond one of the smaller divisions 

 extending to the secondary mid- 

 vein. 



Procumbent. Lying on the ground. 



Prothallicm. (Or prothallus.) A delicate, cellu- 



lar, leaf -like structure produced 

 from a fern spore, and bearing the 

 sexual organs. 



Pteridopiiyta. a group of flowerless plants enibrac- 



ingferns, horsetails, club mosses, etc. 



Pubescent. Covered with fine, soft hairs; 



downy. 



Rachis. The continuation of the stipe 



through the blade or leafy portion 

 of the fern. 



Reflexed. Bent abruptly downward or back- 



ward. 



Reniform. Kidney-shaped. 



Revolut' Rolled backward from the margin 



or apex. 



