Eglandular, with diffuse stems, elliptic-ovate lfls, ovate stipules, and short-pedunculate head-like racemes with ovate bracts, originally on limestone-rocks along the Ohio R. in Ky. and Ind., appears to be extinct.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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According to Vail (Bull. Torrey Bot. Club 21:113, 1894) the type specimen of this species was collected June 8, 1839, by Wm. Jones on Rock Island at the Falls of the Ohio River, Clark County, Ind. She also writes: "In the collections of C. W. Short, preserved in the Herb. Acad. Phila., there are notes to the effect that he never found this plant in fruit growing wild, and that he cultivated it vainly for years. His collections of P. stipulata in the herbaria examined, cover a period of some twenty years." J. M. Coulter wrote (Bot. Gaz. 1: 9. 1876) that Dr. Clapp's collection contained a specimen. This specimen was collected in 1838 in the vicinity of New Albany, Floyd County, and is now in the herbarium of Wabash College. P. A. Rydberg wrote me that the specimens in the New York Botanical Garden were immature and might be some form of Desmodium. Thus it seems that this species, if a valid one, is extinct. Known only from the type locality.