106 PRACTICAL BOTANY. 



Ovule : a primitive seed. 



Pales : 1) the inner husks of grasses, representing petals, an upper 



and lower pale ; 2) the bracts (chaff) on the receptacle of the heads 



of many Composites. 

 Palmate leaf: a compound leaf with its leaflets spreading from the 



summit of the common petiole, like the outspread fingers of the hand. 

 Palmately lobed or veined: lobed or veined in a palmate manner. 

 Panicle : a compound raceme branching irregularly. 

 Panicled, paniculate : arranged in panicles. 

 Papilionaceous: butterfly-like; a term applied to the corolla of most 



Leguminous plants. 

 Pappus : thistle-down — that is, the hair-, scale-, or margin-like calyx 



of the flowers (florets) of Composites. 

 Parallel-nerved or veined leaves : leaves famished with not 



branching veins, running lengthwise, side by side (as the leaves of 



most Endogens). 

 Parietal placentae : the seed-hearing ridges of the ovary (or pericarp), 



attached to the walls of its cavity. 

 Parted : separated into segments almost to the base. 

 Pectinate : pinnately dissected into narrow and close segments, 



somewhat resembling the teeth of a comb. 

 Pedate : palmate or palmately cleft into segments, which are cleft in 



their turn. 

 Pedately cleft, lobed, etc. : divided in a pedate manner. 

 Pedicel : the stalk of each particular flower of an inflorescence. 

 Pedicelled, pedicellate : furnished with a pedicel. 

 Peduncle : the stalk of a single flower, or the main stalk of an inflo- 

 rescence. 

 Peduncled : furnished with a peduncle. 

 Peltate : shield-shaped ; a term usually applied to leaves. 

 Penta (in compounds of Greek origin) : five. 

 Pentamerous : having the parts in fives. 

 Pentandrous: with five stamens. 



Pepo : the fruit of the Gourd family, as that of the Cucumber. 

 Perennial : lasting from year to year. 



Perfect flower : a flower furnished with both stamens and pistils. 

 Perfoliate leaf : a leaf with the base of its blade apparently pierced 



by the stem. 

 Perianth: the floral envelopes; a term generally used when these 



envelopes can not be readily distinguished into two sets — that is, 



calyx and corolla. 



