1218 
Ochroleucous. Yellowish white. 
Ocreate or Ochreate. Furnished with 
an ocred, a tubular stipule sheathing 
the stem. 
-Oid (-oides). A Greek termination 
signifying resemblance. 
Opaque. Dull, not shining 
Operculate. Provided with an oper- 
culum. 
Operculum. A lid, separating by a 
transverse line of dehiscence. 
Opposite. Standing against or facing 
each other, as a stamen against a 
petal, or two leaves at the same 
node. 
Orbicular. Circular or nearly so, 
Order. A principal group next above 
the genus in rank, and including 
related genera more or less distin- 
guished from others by certain com- 
mon characters. 
Ordinal. Relating to orders. 
Organ. Any part of a plant concerned 
in its growth and welfare, having 
a special object to serve and more 
or less essential. 
Orthotropous. Applied to an ovule 
or seed that is straight and attached 
immediately by its base. 
Osseous. Bony. 
Oval. Broadly elliptical. 
Ovary. The dilated portion of the 
pistil, bearing and containing the 
ovules. 
Ovate. Shaped like the longitudinal 
outline of an egg, the broader portion 
toward the base; also egg-shaped 
and applied to solids. 
Ovoid. Egg-shaped. 
Ovule. A rudimentary organ which 
after impregnation becomes a seed. 
Ovuliferous. Bearing ovules. 
Palate. A protrusion of the lip of a 
bilabiate corolla. 
Palea. A chaff or chaffy bract; in 
grasses, the two inner bracts of the 
flower. 
Paleaceous. Chaffy or furnished with 
chaff. 
Palet. The same as 
especially of grasses. 
Palmate. Of leaves, compound with 
the leaflets radiating from the sum- 
mit of the petiole. 
palea, used 
Appendix VI: Glossary. 
| Palmately. In a palmate manner. 
Palmatifid. Palmately cleft or divided. 
Pandurate. See Fiddle-shaped. 
Panicle. A loose irregularly branched 
inflorescence. 
Panicled, Paniculate. After the manner 
of a panicle; bearing a panicle. 
Papilionaceous. Buttertly-like; applied 
to the peculiar irregular flower com- 
mon in the Leguminosae. 
Papillose, Papillate. Bearing minute 
thick nipple-shaped or somewhat 
elongated projections, 
Pappus. In compositae, the hairs, 
bristles, or scales crowning the akene 
and taking the place of a calyx. 
Papyraceous. Having the texture of 
paper. 
Paraphyses. In mosses, the minute 
filiform bodies which accompany 
the male and female organs, 
Parasitic. Growing upon and deriving 
nourishment from another plant. 
Parenchyma. The soft cellular tissue 
of plants, at the green fleshy part 
of a leaf. 
Parenchymatous. Like or formed of 
parenchyma; also applied to cells 
narrower at the ends and over- 
lapping each other. 
Parietal. Relating to or situate upon 
the walls of a cavity. 
Paripinnate. Evenly or abruptly pin- 
nate, the terminal odd leaflet wan- 
ting. 
Parted. Cleft nearly to the base. 
Partial. Secondary as distinguished 
from the principal and primary. 
Portition. An inner wall or disse- 
piment, 
Patelliform. Trencher-shaped, with 
the margin less raised than in 
Scutelliform. 
Patent. Widely spreading. 
Patulous. Sligthly or moderately 
epreading. 
Pauciflorous. Few-flowered. 
Pear-shaped. Obovoid or obconical 
with a somewhat tapering base and 
usually oblique or unsymmetrical. 
Pectinate. Comb-like: cleft with nar- 
row closely set segments. 
Pedate. Palmately divided or parted 
with the lateral divisions again 
2-cleft. 
