=squarrose=, applied to imbricated scales, bracts or leaves having pointed tips and which are also spreading or recurved. =stamen=, the male organ of the flower. =staminode=, imperfect and barren stamen. =standard=, the large upper petal in =Papilionaceæ=. =stellate=, applied to a corolla the petals or lobes of which spread out like the rays of a star; also to branched hairs radiating from a centre. =sterile= or =barren=, applied to stamens without pollen and to flowers without a pistil. =stigma=, the upper part of the pistil on which the pollen settles before fertilizing the ovules. =stipe=, a term applied to a stalk on any part of the plant except leaves and flowers. =stipellæ= or =stipels=, subsidiary stipules of leaflets. =stipitate=, stalked. =stipule=, leaf-like appendages, often in pairs and winged at the base of the petiole in certain plants; when taking the form of spines they are known as stipular thorns, _e.g._, =Acacia arabica=, etc. =stolon=, a horizontal runner. =striate=, marked with longitudinal lines or furrows. =strigose=, applied to shortish hair lying close along the surface in one direction. =strobilate=, closely overlapping as the scales in the cone of a fir. =style=, the portion of the pistil which bears the stigma. =subsessile=, almost sessile. =subulate=, awl-shaped. =succulent=, juicy, sappy. =sulcate=, grooved, fluted, furrowed. =superior ovary=, an ovary which is free, _i.e._, not adnate to the calyx or perianth. =suture=, the line along which similar organs cohere, _e.g._, carpellary leaves. =syncarpous=, applied to an ovary composed of several carpels cohering to one another. =tendril=, a thread-like process, usually an abortive petiole or peduncle, having the faculty of grasping and twining round objects and thus enabling the plant to climb. =terete=, with a circular cross section, _e.g._, a cylinder. =ternate=, in threes, whether three leaves in a verticil or 3 lobes or 3 leaflets of a leaf, but the last two are more commonly called tri-lobed or tri-fid and tri-foliolate respectively. =terrestrial=, growing in the earth in contradistinction to epiphytes and tree-parasites. =tesselated=, marked with small squares, _e.g._, nuts of some =Sedges=. =thorn=, usually an abortive branch petiole or peduncle with a sharp, pointed end. =throat=, the upper part of a corolla tube. =thyrsus=, a compound inflorescence in which cymes, usually opposite, are arranged in a narrow pyramidal panicle. =tomentose=, covered with light-coloured, short, soft and somewhat felted hairs (=tomentum=). =torulose=, cylindrical with small swellings and depressions. =torus=, see =receptacle=. =tree=, a plant capable of carrying a single stem, up to about 25 ft. at least. =trigonous=, obtusely 3-angled. =triquetrous=, more sharply 3-angled, almost 3-winged. =truncate=, ending abruptly, as if cut off square. =tuber=, a short underground stem containing farinaceous matter, _e.g._, potato.