Jones: Flora of Illinois 295 



thui. Publ. Santa Barbara Bol. Card, i-xii, 1-308. 1942.— WoLF, C. B., The N. Am. 

 species of Rbammis, Monogr. Rancho Santa Ana Bot. Gard. 1:1-136. 1938. 



Rosaceae 



Bailey, L. H., Enumeration of the Eubati (dewberries and blackberries) native in 

 N. Am.. Gentes Herb. 1:203-300. 1925; The blackberries of N. Am., loc. cit. 2:271- 



471. 1932; The genus Rubm in N. Am., loc. cii. 5:1-228. 1941, 229-462. 1943, 463- 

 588. 1944. — BoLLE, F., Eine iibersicht iiber die Gatfung Ceum, Rep. Spec. Nov. Reg. 

 Veg. 72:1-119. 1933. — Fernald, M. L., & C. A. Weatherby. Varieties of Ceum 

 cmwdense, Rhodora 24:47-50. 1922. — Fernald. M. L., The identities of the sand 

 cherries of e. Am.. Rhodora 25:69-74. 1923. — JoNES, G. N.. A synopsis of the 

 N. Am. species of Sorbus, Jour. Arnold Arb. 20:1-43. 1939; The Am. species of 

 Amelanchier, Univ. Illinois Biol. Monogr. 20: 1945. — Palmer, E. J., Synopsis of 

 N. Am. Crataegi. Jour. Arnold Arb. 6:5-128. 1925. — Rydberg. P. A.. A monograph 

 of the N. Am. Polentilleae, Mem. Dept. Bot. Columbia Univ. 2:1-221. 1898; Rosa- 

 ceae. N. Am. Fl. 22:239-388. 1908;389-480. 1913; 481-533. 1918.— Wiegand. K. 

 M.. The genus Amelanchier in e. N. Am., Rhodora 14:117-161. 1922. — WiGHT. W. 

 F., Native Am. species of Prunus, U. S. Dept. Agric. Bull. 179:1-75. 1915. 



Rubiaceae 

 Standley, p. C., Rubiaceae, N. Am. Fl. 32:1-86. 1918; 87-158. 1921; 159-300. 

 1934. 



Rulaceae 

 Engler. a., Rulaceae in Die Nat. Pflanzenf.. 2 ed. 19a: 187-359. 193 I .— WiLSON. 

 P., Rutaceae, N. Am. Fl. 25:173-224. 1911. 



Salicaceae 

 Schneider, C., Notes on American willows, Bol. Gaz. 67:309-346. 1919; Jour. 

 Arnold Arb. 1:1-32. 1919; 2:1-25, 65-90. 1920; 2:185-204. 1921. 



Sanialaceae 

 PilgER, R., Sanialaceae in Engler & Prantl. Die Nat. Pflanzenf. 2 ed. l€b:52-91. 

 1935. 



Sapoiaceae 

 Clark, R. B., A revision of the genus Dumelia in the U. S., Ann. Missouri Bot. 

 Gard. 29:155-182. 1942. 



Sarraccniaceae 

 Macfarlane, J. M., Sarraccniaceae, Das Pflanzenr. IV. 110:1-38. 1906. — 

 Uphof. J. C. Th.. Sarraccniaceae in Engler & Prantl. Die Nat. Pflanzenf. 2 ed. 

 17b: 704-727. 1936. — Wherry, E. T.. The geographic relations of Sarracenia purpurea, 

 Bartonia 15:1-6. 1933. 



Saxifragaceae 

 Engler, A.. & E. Irmscher, Saxifraga, Das Pflanzenr. IV. 117:1-709. 1916; 

 Saxifragaceae in Engler & Prantl, Die Nat. Pflanzenf. 2 ed. 18a: 74-226. 1930.— 

 Johnson, A. M., A revision of the N. Am. species of the sect. Boraphila, genus Saxi- 

 fraga, Univ. Minnesota Stud. Biol. Sci. 4:1-110. 1923. — RosENDAHL. C. O., A revi- 

 sion of the genus Sullivanlia, loc. cit. 6:401-427. 1927; A revision of the genus Mitella, 

 Engler's Bot. Jahrb. 50:375-397. 1914.— RosENDAHL, C. O., F. K. Butters, & 

 Olga Lakela, a monograph on the genus Heuchera, Minnesota Studies PI. Sci. 2:1- 

 180. 1936.— Small, J. K., & P. A. Rydberg, Saxifragaceae, N. Am. Fl. 22:81-158. 

 1905. 



Scheuchzeriaceae 



Britton, N. L., Scheuchzeriaceae, N. Am. Fl. 17:41-42. 1909. — BuCHENAU, Fr., 

 5c/ieuc/izenaceae, Das Pflanzenr. IV. 14:1-19. 1903. 



Scrophulariaceae 



Grant, Adele L., A monograph of the genus Mimulus, Ann. Missouri Bot. Gard. 

 11:99-388. 1925. — Munz, P. A., The AnlirrhinoiJeae-Antirrhineae of the New 

 World, Proc. Calif. Acad. Sci. (ser. 4) 15:323-397. 1926.— Newsom. Vesta M., A 

 revision of the genus Collinsia, Bot. Gaz. 87:260-301. 1929. — Pennell, F. W., Scro- 



