294 American Midland Naturalist Monograph No. 2 



Polemoniaceae 

 Brand, A., Polemomaceae. Das Pflanzenr. IV. 250:1-203. 1907.— Wherry, E. 

 T., The eastern subulate-leaved phloxes, Bartonia 11:5-35. 1929; The eastern long- 

 styled phloxes, loc. cit. 13:18-37. 1932, 14:14-26. 1932; The eastern veiny-leaved 

 phloxes, loc. cit. 15:14-26. 1933; Miscellaneous eastern Polemomaceae, loc. cit. 18: 

 52-59. 1936; The genus Polemomum in America, Am. Midi. Nat. 27:741-760. 1942; 

 Review of the genera Collomia and Cyimnusleris, loc. cit. 31:216-231. 1944. 



Polv^alaceae 

 Blake, S. F., Polvgalaceae. N. Am'.^Fl. 25:305-379. 1924. 



Polvgonaceae 



Holm, Th., Pohgonum : sect. Tovara. Bot. Gaz. 84:1-26. 1927. — NiEUWLAND, 

 J. A., Our Amphibious Persicarias, Am. Midi. Nat. 2:1-24. 1911; sect. Potamocallis 

 in Peattie. D. C., Flora of the Indiana Dunes, 167-169. 1930. — Rechinger, K. H.. 

 The N. Am. species of Riimex, Field Mus. Nat. Hist. Publ. Bot. 17:1-151. 1937. — 

 Small. J. K., A monograph of the N. Am. species of the genus Polygonum, Columbia 

 Univ. Dept. Bot. Mem. 1:1-183. 1895. — Stanford, E. E., The amphibious group of 

 Polygonum, subgen. Persicaria, Rhodora 27:156-166. 1925; Pol\]goniim pennsxtlvaniciim 

 and related species, loc. cit. 173-184; Polygonum hxiJropiperoides and P. opeloiisaniim, 

 loc. cit. 28:11-17; 22-29. 1926; Pohgonum hxidropiper in Eur. and N. Am., loc. cit. 

 29:77-87. 1927. 



Ponlederiaceae 



Alexander, E. J., Ponlederiaceae, N. Am. Fl. 19:51-60. 1937. — Schwartz, O., 

 Pontederiaceae, in Engler & Prantl, Die Nat. Pflanzenf. 2 ed. 15a: 181-188. 1930. 



Porlulacaceae 

 Pax, F., & K. Hoffmann, Porlulacaceae in Engler & Prantl, Die Nat. Pflanzenf. 

 2 ed. 16c:234-262. 1934. — Poellnitz, K., Monographie der Gattung Talinum, Rep. 

 Spec. Nov. Reg. Veg. 35:1-34. 1934. — Rvdberg, P. A., Porlulacaceae, N. Am. Fl. 



21:279-336. 1932.— Wilson. P., Talinum, loc. cit. 21:280-289. 1932. 



Polamogetonaceae 

 AscHERSON, p., & p. Graebner, Potamogelonaceae, Das Pflanzenr. IV. 11:1-184. 

 1907. — Fernald, M. L., The linear-leaved N. Am. species of Potamogelon, sect. Axil- 

 lares, Mem. Gray Herb. Harv. Univ. 3:1-183. 1932. — OcDEN. E. C, The b-oad-leaved 

 species of Polamogeion of N. Am. n. of Mexico, Rhodora 45:57-105; 119-163; 171- 

 214. 1943.— Taylor. N., Zannichelliaceae, N. Am. Fl. 17:13-27. 1909. 



Primulaceae 



Fassett, N. C, Dodecatheon in e. N. Am., Am. Midi. Nat. 31:455-486. 1944.— 

 Fernald, M. L., Primula, sect. Farinosae in America, Rhodora 30:59-77; 85-104. 

 1928.— Pax, F.. & R. Knuth, Primulaceae, Das Pflanzenr. IV. 237:1-386. 1905; 

 ROBBIN.S, G. T., N. Am. species of Androsaceae, Am. Midi. Nat. 32:137-163. 1944. 



Ranunculaceae 



Ben.son, L., The N. Am. subdivisions of Ranunculus, Am. Jour. Bot. 27:799-807. 

 1940; N. Am. Ranunculi, Bull. Torr. Bot. Club 68:157-172; 477-490. 1941; loc cit. 

 69:298-316. 1942.— Boivin, B., Am. Thalictra and their Old World allies, Rhodora 



46:337-377, 391-445, 453-487. 1944.— Drew, W. B., N. Am. representatives of 

 Ranunculus, sect. Balrachium, loc. cit. 38:1-47. 1936. — Drummond, J. R., &t J. 

 Hutchinson, A revision of Isopprum and its nearer allies, Kew Bull. Misc. Inf. 

 1920:145-169. 1920. — Erick.son, R. O.. Taxonomy of Clemalis. sect. Viorna, Ann. 

 Missouri Bot. Gard. 30:1-62. 1943.— Fernald, M. L., The N. Am. species of 

 Anemone, sect. Anemonanlhea. Rhodora 30:180-188. 1928; Ranunculus aborlivus and 

 its e. Am. allies, loc. cit. 40:416-420. 1938. — Hutchinson, J., Key to Ranunculaceae, 

 Kew Bull. Misc. Inf. 1923:81-89. 1923.- Payson, E. B., Tlie N. Am. species of 

 Aquilegia, Contr. U. S. Nat. Herb. 20:133-157. 1919. 



Rhamnaceae 

 Van ReNNSELALR, M., & H. E. McMinn. A systematic study of the genus Ccano- 



