Niphogeton chirripoi (Suesseng.) Mathias & Constance

Arracacia chirripoi (Siisseng.) Math. & Const, comb. nov
Triphylleion chirripoi Siisseng. Bot. Jahrb. 72: 279. 1942.
Slender, caulescent, branching from a woody base borne on a rootstock (?), 3-5 dm. high, glabrous; leaves triangular-ovate in general outline, excluding the petioles 2-3 cm. long, trifoliate, the leaflets broadly oblanceolate, obtuse, mucronate at the apex, sessile, 2.5-3 cm. long, 5 mm. broad, entire; petioles slender, 3 cm. long, scarious-sheathing at the base; cauline leaves numerous, like the basal; inflorescence simple, the peduncles terminal, 2.5-5 cm. long; involucre of 2 or 3 foliaceous bracts (possibly aberrant leaves?), up to 1 cm. long; involucel of 2 or more (?) bractlets; fertile rays about 6, spreading-ascending, 8-15 mm. long; fertile pedicels few, spreading-aseending; flowers unknown; stylopodium conic; carpophore 2-cleft to about the middle slender; fruit lanceolate, 3 mm. long, glabrous, tapering at the apex, the ribs filiform; oiltubes solitary in the intervals, 1 or 2 on the commissure; seed unchanneled, the face concave.
Type locality: "ChirrirJo grande," Costa Rica. Kupper 1180. Distribution: Known only from the type locality.