42 Proceedings of the Biological Society of Washington. 



Calopogonium ferrugineum, n. sp. 



Herbaceous?; whole plant more or less densely covered with short ap- 

 pressed ferruginous hairs; stems terete, densely hairy; petioles channelled 

 above, shorter than the leaflets; stipules oblong, acutish and somewhat 

 lacerate, pubescent on both sides, 3 mm. long; stipels narrowly lanceolate; 

 petiolules densely pubescent, 3-4 mm. long; leaflets broadly ovate, the med- 

 ian as broad as long, entire or obscurely 2- or 3-lobed, 3-nerved from the 

 rounded base, acuminate and apiculate, sparsely strigillose above more so 

 on the nerves, densely appressed pubescent beneath, 7-8 cm. long; inflor- 

 escence a narrow erect panicle 20-30 cm. long on a stout peduncle nearly 

 as long; branches of the panicle very short, thickened, each bearing 3-5 

 flowers; flowers deflexed, on slender pedicels about 5 mm. long; calyx cam- 

 panulate, densely ferruginous, 6 mm. long, the upper Up shorter than the 

 lower and with 2 short acutish teeth, the lower lip with 3 acute teeth, the 

 median longest and nearly as long as the calyx tube ; bracteole at base of 

 calyx minute, oblong-lanceolate; corolla purple, 7-8 mm. long; standard 

 orbicular, obliquely nerved, not notched at apex, auricle at base, the auri- 

 cles inflexed, unguiculate, the claw one-fourth as long as the blade, a linear 

 thickening on each side of a median depression at the base of the blade; 

 wings as long as the keel, spatulate, obtuse, unguiculate, each with a horn- 

 like reflexed auricle at base; keel curved, blunt, the petals slightly united, 

 somewhat gibbous, unguiculate, each blade with a hood-shaped or rarely 

 horn shaped sac at base; ovary linear, densely hairy; style sparsely hairy 

 beneath, coiled once at tip; pods (immature) linear, compressed, recurved 

 at tip, densely ferruginous, not constricted between the seeds, 9 cm. long, 

 1.5 cm. wide, the stout pedicel 1 cm. long. 



Buissons a Las Vueltas, Tucurrique, Costa Rica, A. Tonduz 12889, Dec, 

 1898, sheet 577,657 in U. S. National Herbarium. Allied to C. coeruleum 

 (Benth.) Desv. but readily distinguished by the form of the leaflets, the 

 ferruginous appressed pubescence, the orbicular entire standard, and the 

 much larger not constricted pods. The style in C. coeruleum is less hairy 

 and straight. 



