GLOSSARY 



881 



Panicked, Paniculate. Borne In a panicle ; re-' 

 sembling a panicle. 



Papilionaceous (corolla). Having a standard, 

 wings, and keel, as in the peculiar corolla of 

 many Leguminosae. 



Papillose. Bearing minute nipple-shaped pro- 

 jections. 



Pappus. The modified calyx-limb in Composi- 

 tae, forming a crown of very various character 

 at the summit of the achene. 



Parasitic. Growing on and deriving nourish- 

 ment from another plant. 



Parenchyma. Soft tissue of cells with un- 

 thickened walls. 



Parietal. Borne on or pertaining to the wall or 

 inner surface of a capsule. 



Parted. Cleft nearly but not quite to the 

 base. 



ParthenogeneUc. Developing without fertiliza- 

 tion. 



Partial. Of secondary rank. 



Pathological. Diseased. 



Pectinate. Pinnatifid with narrow closely set 

 segments ; comb-like. 



Pedate. Palmately divided or parted, with the 

 lateral segments 2-cleft. 



Pedicel. The support of a single flower. 



Pedicellate. Borne on a pedicel. 



Peduncle. A primary flower-stalk, supporting 

 cither a cluster or a solitary flower. 



Pedunculate. Borne upon a peduncle. 



Pellucid. Clear, transparent. 



Peltate. Shield-shaped and attached to the sup- 

 port by the lower surface. 



Pendulous. More or less hanging or declined. 

 Pendulous ovule, one that hangs from the 

 side of the cell. 



Perennial. Lasting year after year. 



Perfect (flower). Having both pistil and sta- 

 mens. 



Perfoliate (leaf). Having the stem apparently 

 passing through it. 



Perianth. The floral envelope, consisting of 

 the calyx and corolla (when present), whatever 

 their form. 



Pericarp. The matured ovary. 



Perigynium. The inflated sac which incloses 

 the ovary in Carex. 



Perigynous. Adnate to the perianth, and there- 

 fore around the ovary and not at its base. 



Peripheral. On or near the margin. 



Persistent. Long-continuous, as a calyx upon 

 the fruit, leaves through winter, etc. 



Personate (corolla). Bilabiate, and the throat 

 closed by a prominent palate. 



Petal. A division of the corolla. 



Petaloid. Colored and resembling a petal. 



Petiolate. Having a petiole. 



Petiole. The footstalk of a leaf. 



Phaenogamous. Having flowers with stamens 

 and pistils and producing seeds. 



Phyllodium (pi. Phyllodia). A somewhat 

 dilated petiole having the form of and serving 

 as a leaf-blade. 



Phytological. Relating to the study of plants. 



Pilose. Hairy, especially with soft hairs. 

 GRAY'S MANUAL 66 



Pinna (pi. Pinnae). One of the primary di- 

 visions of a pinnate or compoundly pinnate 



frond or leaf. 

 Pinnate (leaf). Compound, with the leaflets 



arranged on each side of a common petiole. 

 Pinnalifid. Pinnately cleft. 

 Pinnule. A secondary pinna ; one of the pin- 



nately disposed divisions of a pinna. 

 Pistil. The seed-bearing organ of the flower, 



consisting of the ovary, stigma, and style when 



present. 

 Pistillate. Provided with pistils, and, in its 



more proper sense, without stamens. 

 Pitted. Marked with small depressions or pits. 

 Placenta. Any part of the interior of the ovary 



which bears ovules. 



Plicate. Folded into plaits, usually lengthwise. 

 Plumose. Having fine hairs on each side, like 



the plume of a feather, as the pappus-bristles 



of some Thistles. 

 Plumule. The bud or growing point of the 



embryo. 



Pod. Any dry and dehiscent fruit. 

 Pollen. The fecundating grains contained in 



the anther. 



Polliniferous. Bearing pollen. 

 Pollinium (pi. PoUinia). A mass of waxy 



pollen or of coherent pollen-grains, as in 



Asclepias and Orchidaceae. 

 Polypetalous. Having separate petals. 

 Pome. A kind of fleshy fruit of which the 



apple is the type. 



Porose. Pierced with small holes or pores. 

 Posterior. In an axillary flower, on the side 



nearest to the axis of inflorescence. 

 Praemorse. Appearing as if bitten off. 

 Prickle. A small spine or more or less slender 



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 or trailing 



but without rooting at the nodes. 

 Proliferating, Proliferous. Producing off- 

 shoots. 



Prostrate. Lying flat upon the ground. 

 Proterogynous. Having the stigma ripe for the 



pollen before the maturity of the anthers 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. 

 Puberulent. Minutely pubescent. 

 Pubescent. Covered with hairs, especially if 



short, soft and down-like. 



Pulverulent. Powdered ; appearing as if cov- 

 ered by minute grains of dust. 

 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. 

 Pyriform. Pear-shaped. 



