The flowers develop from scaly buds on the wood of the previous season; flower-buds plump, conical or obtuse, free or appressed and usually appearing before the leaves; flowers of two distinct sizes, with some intermediates, the smaller size ranging under an inch in diameter, the larger, an inch and a half or more; the floral color ranges from an occasional pure white through shades of pink to deep red; fragrant and always pleasantly so; pedicels very short, sometimes seemingly wanting, glabrous, green; calyx-tube urn-shaped, usually smooth but sometimes pubescent without, green overlaid with red outside, greenish-yellow or dark orange within; calyx-lobes five in number, short, broad, glabrous within, pubescent without; petals ovate, five in number, rounded at the apex which is sometimes notched, tapering to a claw, sometimes notched at the base; stamens twenty to thirty, about one-half inch long, slender, distinct, usually colored; anthers yellow; ovary sessile, pubescent, one-celled, surmounted by a simple style which is terminated with a small stigma, the whole pistil equaling the stamens in length or longer. Fruit a fleshy drupe, sub-globular but much modified in shape and size under cultivation; suture usually distinct; cavity well marked, abrupt; apex with a mamelon or mucronate tip; color varying from greenish-white to orange-yellow, usually with a red cheek on the side exposed to the sun, sometimes covered with red; very pubescent except in the nectarine; skin adherent or free from the pulp; flesh greenish-white or yellowish, often stained with red at the pit, occasionally red, sweetish, acidulous, aromatic; stone free or clinging, elliptic or ovoid, sometimes flat, compressed, pointed; outer surfaces wrinkled and pitted, inner surfaces polished; ventral and dorsal sutures grooved or furrowed, sometimes winged; the seed almond-like, aromatic, bitter.