GLOSSARY. 



Obvolate (in the bud) : when the margins of one leaf alternately overlap 



those of the opposite one. 

 Ochreate : furnished with ochreoe (boots), or stipules in the form of sheaths ; 



as in Polygonum. 

 Ochroleticous: yellowish- white ; dull cream-color. 

 Offset: short branches next the ground which take root. 

 One-ribbed, On&nerved, &c. : furnished with only a single rib, &o., &c. 

 Opaque, applied to a surface, means dull, not shining. 

 Oplrculate: furnished with a lid or cover (operculum), as the capsules ol 



Opposite : said of leaves and branches when on opposite sides of the stem 



from each other (i. e. in pairs). Stamens are opposite the petals, &c. 



when they stand before them. 

 Orbicular, Orbiculate: circular in outline or nearly so. 

 Organ : any member of the plant, as a leaf, a stamen, &c. 

 Orthatropous (ovule or seed) : straight, the chalaza and hilum being at one 



end, the micropyle at the other. 

 Osseous: of a bony texture. 

 Oval: broadly elliptical. 



Ovary: that part of the pistil containing the ovules or future seed*. 

 Ovate: shaped like an egg with the broader end downwards, or, in plane sur 



faces, such as leaves, like the section of an egg lengthwise. 

 Ovoid : ovate or oval in a solid form. 

 Ovule: the body which is destined to become a seed. 



Palea (plural paleas) : chaff; the inner husks of Grasses ; the chaff or bracts 

 on the receptacle of many Composites, as Coreopsis, and Sunflower. 



Paleaceous : furnished with chaff, or chaffy in texture. 



Palmate: when leaflets or the divisions of a leaf all spread from the apex 

 of the petiole, like the hand with the outspread fingers. 



Palmately (veined, lobed, &c.) : in a palmate manner. 



Pdnicle: an open cluster; like a raceme, but more or less compound. 



Panicled, Paniculate : arranged in panicles, or like a panicle. 



Paperi/ : of about the consistence of letter-paper. 



Papilionaceous : butterfly-shaped ; applied to such » corolla as that of tne 

 Pea and the Locust-tree. 



1'iiptlla (plural papillce) : little nipple-shaped protuberances. 



Papillate, Papillose: covered with papillae. 



Pappus: thistle-down. The down crowning the achenium of the Thistle, 

 and other Compositaa, represents the calyx ; so the scales, teeth, chafl, 

 as well as bristles, or whatever takes the place of the calyx in this fam- 

 ily, are called the pappus. 



Parallel-veined, or nerved (leaves). 



Parenchjma : soft cellular tissue of plants, like the green pulp of leaves. 



Parietal (placentas, &c): attached to the walls (parietes) of the ovary or 

 pericarp. 



Parted: separated or cleft into parts almost to the base. 



Partial involucre, same as an involucel: partial petiole, a division of a main 

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