1084 



GLOSSARY 



Parasitic. Growing on and deriving nour- 

 ishment from another plant. 



Parietal. Borne on or pertaining to tlie 

 wall or inner surface of a capsule. 



Parted. Cleft nearly, but not quite to 

 the base. 



Pectinate. Pinnatifld with narrow, closely 

 set segments; comb-like. 



Pedate. Palmately divided or parted, 

 witli the lateral segments 2-cleft. 



Pedicel. The stalk of a single flower in a 

 flower-cluster. 



Pedicellate, Pedicelled. Furnished with a 

 pedicel. 



Peduncle. A primary flower-stalk, sup- 

 porting either a cluster or a solitary 

 flower. 



Peduncled, Pedunculate. Furnished with 

 a peduncle. 



Peltate. Shield-shaped; a flat organ, with 

 a stalk on its lower surface. 



Pendulous. More or less hanging or de- 

 cUned. Pendulous ovule, one that hangs 

 from the side of the cell. 



Penicillate. With a tuft of hairs or hair- 

 like branches. 



Penta-, in compounds, means five. 



Pentagonal. Five-angled. 



Perennial. Lasting from year to year. 



Perfect (flower). Having" both stamens 

 and pistils. 



Perforated. With holes. 



Perianth. The floral envelopes of the 

 flower, especially used when calyx and 

 coroUa cannot be distinguislied. 



Pericarp. The wall of the fruit, or seed- 

 vessel. 



Perigynium (-a). The more or less in- 

 flated sac-like organ surrounding the 

 pistil In Carex. 



Perigynous. Borne around the ovary. 



Persistent. Long-continuous, as a caly.x 

 upon the fruit, leaves through winter, 

 etc. 



Personate. Masked; bilabiate, and the 

 throat closed by a prominent palate. 



Petal. One of the leaves of the corolla. 



Petaloid. Petal-Uke; resembling or colored 

 like petals. 



Petiolate. Having a petiole. 



Petiole. The leaf-stalk. 



Petioled. Furnished with a petiole. 



Petiolulate. With a petiolule (leaflet). 



Petiolule. The stalk of a leaflet. 



Phaenogamous. Having flowers with .sta- 

 mens and instils and producing seeds. 



Phyllode, PhiiUodium (-a). A somewhat 

 dilated i)etiule having the form of and 

 serving as a leaf-blade. 



Phyllopodic. With a leafy base. 



-phyllous (in compo.sition). With leaves 

 as gamophyllous, with luiited leavas, and 

 diphyllous, with two leaves, etc. 



Pilose. Hairy, with soft hairs. 



Pinna (pi. Pinnae). One of the primary 

 divisions of a pinnate or compoundly 

 pinnate frond or leaf. 



Pinnate (leaf). Compound, with the leaf- 

 lets arranged on each side of a common 

 petiole. 



Pinnatifld. Pinnately cleft. 



Pinnatisect. Pinnately divided. 



Pinnule. A division of a pinna. 



Pistil. The central organ of a flower con- 

 taining the macrosporangcs (ovules). 



Pistillate. Provided with pistils, anrl, in 

 its more proper sense, witliout stamens. 



Pitted. Marked with small dei)ressions or 

 pits. 



Placenta. An ovule-bearing surface. 



Plane. With a flat, not curved surface. 



Planoconvex. Plane on one side and con- 

 vex on the other. 



Plicate. Folded mto plaits, like a fan. 



Plumose. Having fine hairs on each side, 

 like the phmie of a feather. 



Plumule. The rudimentary terminal bud 

 of the embryo. 



Pod. Any dry and dehiscent fruit. 



Pointed. Acuminate. 



Pollen. Pollen grain. See Microspore. 



Pollinia. The pollen-masses of the Or- 

 chid and Milkweed Families. 



Polliniferous. Bearing pollen. 



Poly-, in compounds, means many. 



Polyadelphous. Applied to stamens which 

 are united by their filaments into many 

 sets. 



Polygamous. Bearing both perfect and 

 imperfect flowers. 



Polymorphous. Of several forms. 



Polypetalous. Possessing many petals. 

 Applied by the older botanists to flowers 

 having the petals distinct or ununited. 



Polysepalous. When the sepals are dis- 

 tinct. 



Pome. The fleshy fruit of the Apple 

 Family. 



Posterior. On the side towards the axis; 

 see anterior. 



Prickles. Sharp elevations of the bark, 

 and coming off with it, as in the rose. 



Prismatic. Of the shape of a prism, angu- 

 lar, with flat sides, and of nearly imi- 

 form size throughout. 



Procumbent. TraiUng on the ground. 



Proliferous. Bearing offsprings; a shoot, 

 a branch, a rosette, or a flower produc- 

 ing a shoot ending in a similar organ. 



Prostrate. Lying flat upon the ground. 



Prothallium. The sexual generation of 

 Pteridophyta. 



Pruinose. Frosted; covered with a powder 

 hke hoar-frost. 



Pseudo (in combinations). Falsely. 



Pteridophytes. Fern-plants ; ferns and their 

 allies. 



Puberulent. Minutely pubescent. 



Pubescent. Covered with hairs. 



Pulverulent. Dusted; covered apparently 

 with flne powder. 



Pulvinate. Cushioned, or shaped Uke a 

 cushion. 



Punctate. Dotted with depressions or 

 with translucent internal glands or 

 colored dots. 



Puncticulate. JMinutely pimctate. 



Pungent. Terminating in a rigid sharp 

 point; acrid. 



Pustular, Pustulate. With blister-like ele- 

 vations. 



Pustule. Blister or blister-like process. 



Putamen. The bony part of a stone-fruit. 



Pyriform. Pear-sha])ed. 



Pyxis. A capsule whose dehiscence is 

 circuniscissile, or which opens by a cir- 

 cular, horizontal line, so that the upper 

 part comes off like a lid. 



Quadrate. Nearly square in form. 



Raceme. An elongated indeterminate flow- 

 er-cluster with each flower pedict^lled. 



Racemose. In racemes, or resembling a 

 raceme. 



Rachilla. The axis of the spikelet in 

 grasses. 



Rachis. The axis of a compound leaf, or 

 of a spike or raceme. 



Radially. Spreading from a common 

 center. 



