_Pannose_, covered with a felt of woolly hairs. _Papery_, of about the consistence of letter-paper. _Papilionaceous_, butterfly-shaped; applied to such a corolla as that of the Pea, 91. _Papilla_ (plural _papillæ_), little nipple-shaped protuberances. _Papillate_, _Papillose_, covered with papillæ. _Pappus_, thistle-down. The down crowning the achenium of the Thistle, Groundsel, &c., and whatever in Compositæ answers to calyx, whether hairs, teeth, or scales, 121. _Papyraceous_, like parchment in texture. _Parallel-veined_ or _nerved_ (leaves), 50. _Paraphyses_, jointed filaments mixed with the antheridia of Mosses. _Parasitic_, living as a parasite, i. e. on another plant or animal, 37. _Parenchemytous_, composed of parenchyma. _Parenchyma_, soft cellular tissue of plants, like the green pulp of leaves, 132. _Parietal_ (placentæ, &c.), attached to the walls (_parietes_) of the ovary. _Paripinnate_, pinnate with an even number of leaflets. _Parted_, separated or cleft into parts almost to the base, 55. _Parthenogenesis_, producing seed without fertilization. _Partial involucre_, same as an _involucel_; _partial petiole_, a division of a main leaf-stalk or the stalk of a leaflet; _partial peduncle_, a branch of a peduncle; _partial umbel_, an umbellet, 76. _Partition_, a segment of a _parted_ leaf; or an internal wall in an ovary, anther, &c. _Patelliform_, disk-shaped, like the _patella_ or kneepan. _Patent_, spreading, open. _Patulous_, moderately spreading. _Pauci-_, in composition, few; as _pauciflorous_, few-flowered, &c. _Pear-shaped_, solid obovate, the shape of a pear. _Pectinate_, pinnatifid or pinnately divided into narrow and close divisions, like the teeth of a comb. _Pedate_, like a bird's foot; palmate or palmately cleft, with the side divisions again cleft, as in Viola pedata, &c. _Pedicel_, the stalk of each particular flower of a cluster, 73. _Pedicellate_, _Pedicelled_, borne on a pedicel. _Pedalis_, Latin for a foot high or long. _Peduncle_, a flower-stalk, whether of a single flower or of a flower-cluster, 73. _Peduncled_, _Pedunculate_, furnished with a peduncle. _Peloria_, an abnormal return to regularity and symmetry in an irregular flower; commonest in Snapdragon. _Peltate_, shield-shaped; said of a leaf, whatever its shape, when the petiole is attached to the lower side, somewhere within the margin, 53. _Pelviform_, basin-shaped. _Pendent_, hanging. _Pendulous_, somewhat hanging or drooping. _Penicillate_, _Penicilliform_, tipped with a tuft of fine hairs, like a painter's pencil; as the stigmas of some Grasses. _Pennate_, same as pinnate. _Penninerved_ and _Penniveined_, pinnately veined, 51. _Penta-_ (in words of Greek composition), five; as _Pentadelphous_, 99; _Pentagynous_, with five pistils or styles; _Pentamerous_, with its parts in fives, or on the plan of five; _Pentandrous_, having five stamens, 112; _Pentastichous_, in five ranks, &c.