APPENDIX IL 



Pinnatisect, pinnatifid down to the mid-rib. 



Pinnule, the ultimate free divisions or leaflets of the frond 

 m ferns. 



Pistil, a collective word for the ovary, style and stigma. 



Pistillode, a rudimei. u ary pistil. 



Placenta, the surface to which are attached the ovules. 



Placentation, position of the placenta. 



Plicate, plaited. 



Plumose, feathered. 



Pod, typically a dry fruit derived from a mono-carpellary 

 ovary, elongated in shape and dehiscing aloDg one or both 

 sutures, such for instance as a pea-pod. In a more extended 

 sense any fruit of the Leguminous order or other fruit resem- 

 bling a typical Leguminous fruit. 



Pollen, the male spores which are developed in the pollen- 

 sacs or loculi of anthers. 



Polyadelphous, in many bundles. 



Polygamous, bearing male, female, and hermaphrodite 

 flowers on the same plant. 



Polypetalous, with the petals not combined into a tube 

 (p. 5 ). 



Posterior, see under anterior. Postichous, hinder, at the 

 back, posterior. 



Prickle, a pointed spine-like process originating from the 

 epidermal, or epidermal and subjacent, tissue only. Cp. 

 thorn. 



Primary nerves, see Nervation. 



Protandrous, the anthers ripening before the pistil is ready 

 10 fertilization. 



Pseudocarp, a fruit or cluster of fruits together with the 

 accrescent axis, peduncle or other parts not usually considered 



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