GLOSSARY. 



Obfoclvte (in the bud) : when the margms of one leaf alternately overlap 



those of the opposite one. 

 dchreate : furnished with ochrece (boots), or stipules in the form of sheaths ; 



as in Polygonum. 

 Ochroieucous : yellowish- white ; dull cream-color. 

 Offset : short branches next the ground which take root. 

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

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

 Operculate: furnished with a lid or cover (operculum), as the capsules oi 



Mosses. 

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



from each other(i. e. in pairs). Stamens are opposite tlie 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. 

 Orthdtropous (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. 

 Ovtde: the body which is destined to become & seed. 



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

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



Paleaceous: furnislied 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. 



Papery : of about the consistence of letter-paper. 



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

 Pea and the Locust-tree. 



Papilla (plural papillce) : little nipple-shaped protuberances. 



Papillate, Papillose: covered with papillae. 



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

 and other Compositae, represents the calyx; so the scales, teeth, chaff, 

 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). 



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



Parietal (placentae, &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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