Ravenelia gracilis Arthur 1905

Ravenelia gracilis Arth. Bot. Gaz. 39 : 393. 1905
Pycnia amphigenous, crowded in small groups, punctiform, prominent, fuscous, subcuticular, hemispherical, 60-100 // broad, and half as high.
Uredinia epiphyllous, scattered, small, less than 0.25 mm. in diameter, round, mammillose, subepidermal, dehiscent by central, irregular rupture, the encircling epidermis forming an aecidioid cup ; paraphyses numerous, intermixed with the spores, or more often only peripheral, cylindrical, 7-10 by 40-60//, somewhat contorted, walls smooth, thin, nearly or quite colorless; urediniospores elliptical or obovate-oblong, 16-21 by 30-40// ; wall rather thin, 1.5-2.5//, golden-brown, strongly and evenly echinulate, pores 4-6, equatorial.