Itasina filifolia (Thunb.) Raf.

Delicate perennial herb, sometimes appearing annual, glabrous, with a very small, fleshy, carrot?like root. Leaves radical (basal), simple, elliptic to oblong or more commonly narrowly linear, filiform or grass?like, sometimes spirally twisted through several turns; rarely a few cauline. Flowers in small, compound umbels. Bracts few, linear; bracteoles similar to the bracts but smaller. Calyx lobes variable, ovateacuminate, persistent, sometimes linear, recurved or spinescent. Petals obovate, white. Styles long, erect to slightly divergent. Stylopodia conical to narrowly conical. Fruits oblong, crowned with persistent styles; mericarps oblong, semiterete; commissure narrow. Carpophores bifurcate. Ribs 5, prominent. Rib oil ducts obsolete. Vittae 6, large. Crystals amphiseminal, druses. Seeds sulcate beneath vittae, somewhat flattened, concave or convex on commissural face.