POISON n.
the poison ivy; also, the more shrubby Rhus diversiloba of California and Oregon. Poison sac. (Zoöl.) Same as Poison gland, above. See Illust. under Fang. -- Poison sumac (Bot.), a poisonous shrub of the genus Rhus (R. venenata); -- also called poison ash, poison dogwood, and poison elder. It has pinnate leaves on gr…
POLLEN n.
rain (Bot.), a particle or call of pollen. -- Pollen mass, a pollinium. Gray. -- Pollen sac, a compartment of an anther containing pollen, -- usually there are four in each anther. -- Pollen tube, a slender tube which issues from the pollen grain on its contact with the stigma, which it penetrates, thus conveying, i…
POMACEOUS a.
Of or pertaining to a suborder (Pomeæ) of rosaceous plants, which includes the true thorn trees, the quinces, service berries, medlars, and loquats, as well as the apples, pears, crabs, etc.