1921] NATURAL SCIENCES OF PHILADELPHIA. 535 



Sandy soil, oak-knolls in long-leaf pineland, and on adjacent 

 coast prairie, western Louisiana and eastern Texas. Ranges from 

 Nova Scotia to Manitoba, south to Florida and Texas. 



Louisiana. Calsasieu: DeQuincy, Pennell 10230 (A, C, H, 

 U, Y); Perkins, Pennell 10212 (H, K, L, M, T, U, Y); Lake Charles, 

 Cocks (L); Vinton. Natchitoches: Natchitoches, Cocks (L). 



Texas. Jasper (?) : 30 miles northeast of Beaumont, Bray 67 

 (T, U). San Augustine: San Augustine, Crocket (U). 



Herbaria in which Specimens seen may be Consulted. 



Guide-letters in the list of specimens cited with each species 

 refer to the following herbaria. 



A — Academy of Natural Sciences, Philadelphia, Pa. 



C — Field Museum of Natural History, Chicago, 111. 



H — Gray Herbarium of Harvard University, Cambridge, Mass. 



I — University of IlUnois, Urbana, 111. 



J — Jardin des Plantes, Paris, France 



K — Ke'w Gardens, Ivew, England 



L — Tulane University, New Orleans, La. 



M — Missouri Botanic Garden, St. Louis, Mo. 



N — -University of Notre Dame, Notre Dame, Ind. 



O — Agricultural Experiment Station, Stillwater, Okla. 



P — University of Pennsylvania, Philadelphia, Pa. 



R — University of Wyoming, Laramie, Wyo. 



S — Charleston Museum, Charleston, S. C. 



T — University of Texas, Austin, Tex. 



U — United States National Herbarium, Washington, D. C. 



Y — New York Botanical Garden, Bronx Park, New York City 



Collectors whose Specimens are cited in Lists accompanying 



Species. 



Letters, following each name, denote state from which collec- 

 tor's specimens have been seen: A — Arkansas, L — Louisiana, 

 0— Oklahoma, T— Texas. 



Allison, .-Vndrew (L). Butler, G. D. (0). 



Ball. C. R. (L). Butler, Mrs. J. {T). 



Barker, C. (0). Canby, W. M. (T). 



Berlandier, J. L. (T). Carleton, M. A. (0). 



Bigelow, J. M. (A, 0, T). ■ Chandler, H. P. (T). 



Biltmore Herbarium {A). Clawson, A. B. {T). 



Blake, W. P. {T). Clemens, J. {T). 



Blankinship, J. W. (0). Cocks, R. S. (L). 



Blankinship, L. A. (0). CoviUe, F. V. {A). 



Bray, W. L. (T). Crawford, E. W. (T). 



Broadhead, G. C. (T). Crocket, G. L. {T). 



Buckley, S. B. (T). Croft, M. B. (T). 



Bush, B. F. (A, L, O, T). Dewey, L. H. (T). 



