Nathaniel Lord Britton,
An Illustrated Flora of the Northern United States…
(1913)
“ Pinnate. Leaves divided into leaflets or segments along a common axis. Pinnatifid. Pinnately cleft to the middle or beyond. Pinnule. A division of a pinna. Pistil. The central organ of a flower containing the macrosporanges (ovules) . Pistillate. With pistils; and usually employed in the sense of without stamens. Placenta. An ovule-bearing surface. Plicate. Folded into plaits, like a fan. Plumose. Resembling a plume or feather. Plumule. The rudimentary terminal bud of the embryo. Pollen. Pollen-grain. Contents of the anther. See Microspore. Pollinia. ”
