Dalea melantha S. Schauer

Parosela melantha (S. Schauer) Rydberg
Dalea melantha S. Schauer, Linnaea 20: 746. 1847.
A shrub; stem erect, glabrous, sparingly glandular-dotted, blackening in drying; leaves 1-2 cm. long, spreading; stipules subulate, 2 mm long; rachis sulcate, glabrous; stipels conic, fleshy; leaflets 7-13, cuneate, usually emarginate or retuse, 2-4 mm. long, glabrous on both sides, conspicuously glandular-dotted beneath, blackening in drying; peduncles 2-5 cm. long; spikes oblong, 1-4 cm. long; bracts ovate-lanceolate, acuminate, ciliate at the base and along the margins black, glabrous on the back, at least at the tip; calyx-tube campanulate-turbinate 2-3 mm. long, strongly 10-ribbed, pilose, with a row of glands between the ribs; lobes filiform from a triangular base, plumose, longer than the tube; corolla yellow, turning almost black in drying; blade of the banner 3 mm. long, cordate, usually with a gland at the tip, the claw 2-3 mm. long; blades of the wings 4 mm., those of the keel-petals 5 mm. long, the claws of both 1.5 mm. long; pod villous-pilose above, glabrous towards the base.
Type locality: State of Oaxaca.
Distribution: Veracruz and Hidalgo to Oaxaca.

Parosela fuscescens Rydberg, sp. nov
A shrub, probably 1 m. high or more; branches glabrous, leafy; leaves 1-2 cm. long; stipules subulate, persistent, 1-2 mm. long; rachis glabrous; stipels conic, gland-like; leaflets 5-11, oblong-obovate, often retuse, 4-6 mm. long, glabrous on both sides, glandular-dotted beneath; spikes terminal, dense, 1.5-2.5 cm. long, 1 cm. thick, short-peduncled ; bracts lanceolate, pilose and glandular, acute; calyx-tube campanulate, 3 mm. long, 10-ribbed, pilose, conspicuously glandular-dotted in the intervals; lobes filiform from a broad base, 4 mm. long, plumose; corolla yellow, the petals usually with a large gland near the tip; blade of the banner broadly rhombic-ovate, 4 mm. long, the claw 3 mm. long; blades of the wings 5 mm. long, those of the keel-petals broader, 6 mm. long, with a smaller reflexed basal lobe; pod densely and finely pilose above, glabrous below.
Type collected in Coahuila, in 1880, Edward Palmer 209 (U. S. Nat. Herb. no. 24309).