822 



GLOSSAHY. 



Parietal, applied to placentas on the wall -of 

 the ovary. 



Pari-pinnate, a compound pinnate leaf, end- 

 ing in two leaflets. 



Parthenogenesis, production of perfect seed 

 with embryo, without the application of 

 pollen. 



Partite or Parted, cut down to near the 

 base, the divisions being called Partitions. 



Patella, rounded sessile apothecium of 

 Lichens. 



Patent, spreading widely. 



Pathology, Vegetable, same as Nosology. 



Patulous, spreading less than when patent. 



Pectinate, divided laterally into narrow seg- 

 ments, like the teeth of a comb. 



Pedate and Pedatifid, a palmate leaf of 

 three lobes, the lateral lobes bearing other 

 equally large lobes on the edges next the 

 middle lobe. 



Pedicel, the stalk supporting a single flower ; 

 such a flower is Pedicellate. 



Peduncle, the general flower-stalk or floral 

 axis. Sometimes it bears one flower, at 

 other times it bears several sessile or pedi- 

 cellate flowers. 



Pelagic, growing in many distant parts of 

 the ocean. 



Pellicle, the outer cuticular covering of 

 plants. 



Peloria, a name given to a teratological phe- 

 nomenon, which consists in a flower, which 

 is usually irregular, becoming regular ; for 

 instance, when Linaria, in place of one spur, 

 produces five. 



Peltate, shield-like, fixed to the stalk by a 

 point within the margin ; peltate hairs, at- 

 tached by their middle. 



Pendulous, applied to ovules which are hung 

 from the upper part of the ovary. 



Penicillate, pencilled, applied to a tufted 

 stigma resembling a camel-hair pencil, as in 

 the Nettle. 



Penni-nerved and Penni-veined, the veins 

 disposed like the parts of a feather, running 

 from the midrib of the leaf to the margin. 



Penta, Pente, five ; same as Quingue in 

 Latin. 



Pentagonal, with five angles having convex 

 spaces between them. 



Pentagynous, having five styles. 



Pentamerous, composed of five parts ; a pen- 

 tamerous flower has its different whorls in 

 five, or multiples of that number. 



Pentandrous, having five stamens. 



Pentangular, with five angles and five flat 

 faces between them. 



Pepo and Peponida, the fruit of the Melon, 

 Cucumber, and other Cucurbitacese. 



Per, when placed before an adjective, some- 

 times gives it the value of a superlative, as 

 J'erpusillus, very weak ; at other times it 

 means through, as perfoliate^ through the 

 leaf 



Percureent, running through from top to 

 bottom. 



Perennial, living, or rather flowering, for 

 several years. 



Perfoliate, a leaf with the lobes at the base, 

 united on the side of the stem opposite the 

 blade, so that the stalk appears to pass 

 through the leaf. 



Peri, around ; in Latin, Circa. 



Perianth, a general name for the floral enve- 

 lope ; applied in cases where there is only a 

 c^yx, or where the calyx and corolla are 

 alike. 



Pericarp, the covering of the fruit 



Perich^tial, applied to the leaves surround- 

 ing the fruit stalk or seta of Mosses. 



Pericladium, the large sheathing petiole of 

 Umbelliferse. 



Periclinium and Periphoranthium, the in- 

 volucre of Composite. 



Periderm, a name applied to the outer layer 

 of bark. 



Peridium, the envelope of the fructification in 

 Gasteromycetous Fungi. 



Perigone, same as Perianth. Some restrict the 

 term to cases in which the flower is female or 

 pistilliferous. It has also been applied to the 

 involucre of Jungermanniese. 



Perigynium, applied to the covering of the 

 pistil in the genus Carex. 



Perigynous, applied to corolla and stamens 

 when attached to the calyx. 



Peripherical, applied to an embryo curved so 

 as to surround the albumen, following the 

 inner part of the covering of the seed. 



Perisperm, the albumen or nourishing matter 

 stored up with the embryo in the seed. 



Perispore, the outer covering of a spore ; the 

 mother-cell of spores in Algae. 



Peristomatic, cells surrounding a stoma, as 

 in Ceratopteris. 



Peristome, the opening of the sporangium of 

 Mosses after the removal of the calyptra and 

 operculum. 



Perithecium, a hollow conceptacle in Lichens, 

 containing spores, and having an opening at 

 one end. 



Persistent; not falling off, remaining attached 

 to the axis until the part which bears it is 

 matured. 



Personate, a gamopetalous irregular corolla 

 having the lower lip pushed upwards, so as to 

 close the hiatus between the two lips. 



Peetuse, having slits or holes. 



Perul^, the scales of the leaf bud. 



Petaloid, like a petal. 



Petals, the leaves forming the corolHne whorl. 



Petiolate, having a stalk or petiole. 



Petiole, a leaf-stalk ; Petiolule, the stalk of a 

 leaflet in a compound leaf 



Phalanges, applied to stamens divided into 

 lobes, like a partite or compound leaf. 



Phanerogamous, having conspicuous flowers. 



Phaneros and Phonos, conspicuous ; in com- 

 position, Phanero and Phmno. 



Ph^nogamous, same as Phanerogamous. 



Phleboidal, applied to moniliform vessels. 



Phloium, a name applied in composition to the 

 bark. 



Phoranthium, applied to the receptacle of 

 Compositse. 



Phorus, Phorum, and Phore, in words de- 

 rived from the Greek, are used as termina- 

 tions, meaning, that which bears ; equivalent 

 to the Latin Ferus and Fer. 



Phragma, transverse division or false dissepi- 

 ment in fruits. 



Phycochrome, colouring matter in Lichens and 

 in the lower Algae. 



Phycologv, the study of Algae or Seaweeds. 



