Membranous thin and semi-transparent, [51]. Monoecious stamens and pistils on separate flowers, but on the same individual, [144]. Motor cells large thin-walled cells occurring in the epidermis of the leaves of some grasses, [35]. Mucronate possessing a short and a straight point, [70].
N
Node the part of the stem which has a leaf, or the knot in the grass stem, [2].
P
Palea the inner glume in the spikelet of grasses, [4]. Pectinate pinnatifid with narrow segments which are set close like the teeth of a comb, [162]. Pericycle the outermost zone of cells of the stele immediately within the endodermis, [32]. Phloëm the portion of the vascular bundle towards the cortex, [19]. Pileole another name for germ-sheath, or the sheath covering the plumule in the grain, [18]. Piliferous bearing hairs, [31]. Pistil the female organ of a flower, consisting of the ovary, style and stigma, [16]. Plumose feathered, [51]. Prophyllum the first scale-like leaf of a branch found where it joins the main stem, [10]. Protandry (proterandry). anthers ripening before the pistil in the same flower, [16]. Protogyny (proterogyny). pistil ripening before the anthers in the same flower, [16]. Puberulous slightly hairy, [62]. Pubescent clothed with soft hair, [62]. Punctate marked with dots, pits or glands, [63]. Pungent ending in a rigid and sharp point, [59].
R
Raceme a centrifugal or indeterminate inflorescence with stalked flowers, [13]. Rachilla a secondary axis in the inflorescence of the grasses, the axis of the spikelet, [13]. Rachis axis of an inflorescence, [13]. Retuse with a shallow notch at the apex, [67]. Rhizome root-stock or under ground stem prostrate on the ground, [5]. Rugulose somewhat wrinkled, [90].
S
Scaberulous slightly rough due to the presence of short hairs, [69]. Scabrid somewhat rough, [75]. Scale a reduced leaf, [10]. Sclerenchyma elongated cells with pointed ends and much thickened cell-wall. Scutellum the single cotyledon found in connexion with the embryo in grass grains, [18]. Secund directed to one side only, [47]. Serrate beset with small teeth on the margin, [83]. Setose beset with bristles, [102]. Sheath the tubular lower part of a leaf in grasses, [2]. Spathaceous having a large bract enclosing a flower cluster, [104]. Spiciform spike-like, [13]. Spike an inflorescence with sessile flowers on an elongated axis, the older flowers being lower down and the younger towards the top, [13]. Squarrose rough with outstanding processes, [120]. Stipe a short stalk of a gynæcium, [90]. Stipitate having a short stalk, [62]. Stolon any basal branch which is disposed to root, [5]. Striolate marked with very fine longitudinal parallel lines, [49]. Sub-coriaceous somewhat leathery, [47]. Subulate finely pointed, [121].
T