GLOSSARY. 



745 



Plumose. Having fine hairs on each side, 

 like the plume of a feather, as the pappus- 

 bristles of Thistles. 



Plumule. The bud or growing point of the 

 embryo. 



Pod. Any dry and dehiscent fruit. 



Pointed. Acuminate. 



Pollen. The fecundating grains contained 

 in the anther. 



Polliniferous. Bearing pollen. 



Pollinium (pi. Pollinia). A mass of waxy 

 pollen or of coherent pollen-grains, as in 

 Asclepias and Orchids. 



Polypetalous. Having separate petals. 



Pome. A kind of fleshy fruit of which the 

 apple is the type. 



Parose. Pierced with small holes or pores. 



Posterior. In an axillary flower, on the side 

 nearest to the axis of inflorescence. 



Postlcous. On the posterior side ; extrorse. 



Prcemorse. Appearing as if bitten off. 



Prickle. A small spine or more or less slen- 

 der sharp outgrowth from the bark or rind. 



Prismatic. Of the shape of a prism, angular, 

 with flat sides, and of nearly uniform size 

 throughout. 



Procumbent. Lying on the ground. 



Proliferous. Producing offshoots. 



Prostrate. Lying flat upon the ground. 



Proterogynous. Having the stigma ripe for 

 the pollen before the maturity of the an- 

 thers of the same flower. 



Prothallus. A cellular usually flat and 

 thallus-like growth, resulting from the 

 germination of a spore, upon which are 

 developed sexual organs or new plants. 



Pseudaxillary. Terminal but becoming 

 apparently axillary by the growth of a lat- 

 eral branch. 



Pseudo-costate. Falso-ribbed, as where a 

 marginal vein or rib is formed by the con- 

 fluence of the true veins. 



Pteridophytes. Fern-plants; Ferns and 

 their allies. 



Puberulent. Minutely pubescent. 



Pubescent. Covered with hairs, especially 

 if short, soft and downy. 



Punctate. Dotted with depressions or with 

 translucent internal glands or colored dots. 



Puncticulate. Minutely punctate. 



Pungent. Terminating in a rigid sharp 

 point ; acrid. 



Putamen. The shell of a nut; the bony 

 part of a stone-fruit. 



Quadrate. Nearly square in form. 



Raceme. A simple inflorescence of pedicelled 

 flowers upon a common more or less elon- 

 gated axis. 



Racemose. In racemes ; or resembling a 

 raceme. 



Radiate. Spreading from or arranged around 

 a common centre ; bearing ray-flowers. 



Radical. Belonging to or proceeding from 

 the root or base of the stem near the ground. 



Radicle. The portion of the embryo below 

 the cotyledons, more properly called the 

 caudicle. 



Radiculose. Bearing rootlets. 



Rameal. Belonging to a branch. 



Ramification. Branching. 



Ray. The branch of an umbel ; the marginal 

 flowers of an inflorescence when distinct 

 from the disk. 



Receptacle. The more or less expanded or 

 produced portion of an axis which bears the 

 organs of a flower (the torus) or the col- 

 lected flowers of a head ; any similar struc- 

 ture in Cryptogams. 



Recurved. Curved downward or backward. 



Reflexed. Abruptly bent or turned down- 

 ward. 



Regular. Uniform in shape or structure. 



Reniform. Kidney-shaped. 



Repand. With a sligfaily uneven and some- 

 what sinuate margin. 



Resiniferous. Producing resin. 



Reticulate. In the form of network; net- 

 veined. 



Retrorse. Directed back or downward. 



Reluse. With a shallow notch at a rounded 

 apex. 



Revolute. Rolled backward from the mar- 

 gins or apex. 



Rhachis. The axis of a spike or of a com- 

 pound leaf. 



Rhaphe. The ridge or adnate funicle which 

 in an anatropous ovule connects the two 

 ends. 



Rhizome. Any prostrate or subterranean 

 stem, usually rooting at the nodes and be- 

 coming erect at the apex. Very variable in 

 character, and including morphologically 

 the tuber, corrn, bulb, etc. 



Rhombic, Rhomboidal. Somewhat lozenge- 

 shaped ; obliquely four-sided. 



Rib. A primary or prominent vein of a leaf. 



Ringent. Gaping, as the mouth of an open 

 bilabiate corolla. 



Root. The underground part of a plant which 

 supplies it with nourishment. 



Rootstock. Same as Rhiznme. 



Rostrate. Having a beak or spur. 



Rosulate. In the form of a rosette. 



Rotate (corolla). Wheel-shaped ; flat and 

 circular in outline. 



Rotund. Rounded in outline. 



Rudiment. A very partially developed or- 

 gan ; a vestige. 



Rudimentary. But slightly developed. 



Rufous. Reddish brown. 



Rugose. Wrinkled. 



Runcinate. Sharply incited, with the seg- 

 ments directed backward. 



Runner. A filiform or very slender stolon. 



