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GLOSSARY. 



Obconically. Inversely conical, having the 



attachment at the apex. 

 Obcordate. Inverted heart-shaped. 

 Oblanceolate. Lanceolate with the broadest 



part toward the apex. 

 Oblique. Unequal-sided or slanting. 

 Oblong. Considerably longer than broad and 



with nearly parallel sides. 

 Obovate. Inverted ovate. 

 Obovoid. Having the form of an inverted egg. 

 Obsolete. Not evident ; rudimentary. 

 Obtuse. Blunt or rounded at the end. 

 Ocrea, A leggin-shaped or tubular stipule. 

 Ocreate. Having sheathing stipules. 

 Ochroleucous. Yellowish-white. 

 Officinal. Of the shops ; used in medicine 



or the arts. 

 Oospore. The fertilized nucleus or germ-cell 



of the archegonium in Cryptogams, from 



which the new plant is directly developed. 

 Opaque. Dull ; not smooth and shining. 

 Operculate. Furnished with a lid. 

 Operculum. A lid; the upper portion of a 



circumscissile capsule. 

 Orbicular. Circular. 

 Orthotropous (ovule or seed). Erect, with 



the orifice or micropyle at the apex. 

 Oval. Broadly elliptical. 

 Ovary. The part of the pistil that contains 



the ovules. 

 Ovate. Egg-shaped ; having an outline like 



that of an egg, with the broader end down- 

 ward. 



Ovoid. A solid with an oval outline. 

 Ocule. The body which after fertilization 



becomes the seed. 

 Ovutife.rous. Bearing ovules. 



Palate. A rounded projection of the lower 

 lip of a personate corolla, closing the throat. 



Paleaceous. Chaffy. 



Palet. The upper thin chaffy or hyaline 

 bract which with the glume encloses the 

 flower in Grasses. 



Palmate (leaf). Radiately lobed or divided. 



Palmately. In a palmate manner. 



Panicle. A loose irregularly compound in- 

 florescence with pedicellate flowers. 



Panicled, Paniculate. Borne in a panicle ; 

 resembling a panicle. 



Papilionaceous (corolla). Having a stand- 

 ard, wings, and keel, as in the peculiar co- 

 rolla of many Leguminosae. 



Papillose. Bearing minute nipple-shaped 

 projections. 



Pappus. The modified calyx-limb in Com- 

 positae, forming a crown of very various 

 character at the summit of the achene. 



Parasitic. Growing on and deriving nour- 

 ishment from another plant. 



Parietal. Borne on or pertaining to the wall 

 or inner surface of a capsule. 



Parted. Cleft nearly but not quite to the 

 base. 



Partial. Of secondary rank. 



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, support- 

 ing either a cluster or a solitary flower. 



Pedunculate. Borne upon a peduncle. 



Peltate. Shield-formed and attached to the 

 support by the lower surface. 



Pendulous. More or less hanging or de- 

 clined. Pendulous ovule, one that hangs 

 from the side of the cell. 



Perennial. Lasting year after year. 



Perfect (flower). Having both pistil and 

 stamens. 



Perfoliate (leaf). Having the stem appar- 

 ently passing through it. 



Perianth. The floral envelope, consisting of 

 the calyx and corolla (when present), what- 

 ever their form ; in Hepaticse, the inner usu- 

 ally sac-like involucre of the archegonium. 



Pericarp. The matured ovary. 



Perif/yn ium. The inflated sac which encloses 

 the ovary in Carex. 



Pe.rigi/nous. Adnate to the perianth, and 

 therefore around the ovary and not at its 

 base. 



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. 



Phcmogamous. Having flowers with stamens 

 and pistils and producing seeds. 



Phyllodium. A somewhat dilated petiole 

 having the form of and serving as a leaf- 

 blade. 



Pilose. Hairy, especially with soft hairs. 



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. 



Pinnatifid. Pinnately cleft. 



Pinnule. A secondary pinna; oneofthepin- 

 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. 



Plane. Flat; with aflat surface or surfaces. 



Plicate. Folded into plaits, usually length- 

 wise. 



