Poterium. Prunus.] ROSACES. 303 
Syst. 1.4383. DC. Prodr. 2.594. Turpin, Dict. Sci. Nat. 47. 278, t. 240. Beck, 
Bot. 115. Eat. & Wr. 411. Dietr. 1.459. Chapman, 122. 
P. officinale. Benth. & Hook. Gen. Pl. 1. 624. See syn. in Ledeb. Fl. Ross. 2. 27, 
& Maxim. 1. ec. 161 (under Sanguisorba) ; Hook. f. Arct. Pl. 290 & 326. — Gray, Proc. 
Am. Acad. 7. 340 & 8. 381. Brew. & Wats. Bot. Calif. 1. 186. 
Sanguisorba microcephala. Presl, Epimel. Bot. 202. Walp. Ann. 3. 855. 
P. Sancursorpa, Linn. Hook. Fl. Bor-Am. 1. 198. Torr. & Gray, Fl. 1. 429. 
Eat. & Wr. 374. Wood, Cl.-Book, 326. Gray, Manual, 680. 
P. Sitchense. 
Sanguisorba Canadensis. Cham. & Schlecht. in Linnea, 2.32. Bongard, Veg. 
Sitch. 133. 
S. media. Hook. Fl. 1. 197. Don, Mill. 2. 594. | Presl, Epimel. Bot. 202. 
S. Canadensis, var. latifolia. Hook. Fl. Bor.-Am. 1. 198. Torr. & Gray, Fl. 1. 429, 
Ledeb. Fl. Ross. 2, 28. 
S. Sitchensis. C. A. Meyer; Trautv. & Meyer, Fl. Ochot. 34. 
S. Canadensis, var. media. Maximowicz, l. ec. 151. 
PRUNUS Americana. Marshall, Arbust. 111. Darlington, Ann. Lye. N. Y. 
3. 87, t.1; Fl. Cestr. 287. Beck, Bot. 95. Torr. & Gray, FI. 1. 407; Pac. R. 
Rep. 2.164. Eat. & Wr. 377. Torrey, Fl. N. Y. 1.194; Emory’s Rep. 408; Pac. 
R. Rep. 4.82. Emerson, Trees of Mass. 449. Hook. in Lond. Journ. Bot. 6. 217. 
Roem. Syn. Monogr. 3.59. Gray, Pl. Fendl. 40; Manual, 148. Scheele, Roem. 
Texas, 430. Nutt. Sylva, 2.19,t.48. Richard. Arct. Exped. 424. Parry, Pl. 
Minn. 611. Engelm. Pl. Upp. Miss. 190. Curtis, Bot. N. Car. 56. Lesqx. Fl. 
Ark. 358. Chapman, 119. Pl. Bourgeau, 256. Porter, Fl. Col. 33. 
2 P. Mississippi. Marshall, Arbust. 112. 
P. spinosa. Walter, 146. 
P. nigra. Ait. Hort. Kew. 2.165. Willd. Spec. 2.993. oir. Dict. 5. 674. 
Persoon, 2. 35. Sims, Bot. Mag. t.1117. Pursh, 331. Torrey, Fl. U. S. 469. 
Spreng. Syst. 2.477. Roem. Syn. Monog. 3. 59. 
Cerasus nigra. Loisel. in Nouv. Duham. 5. 32. Seringe, DC. Prodr. 2. 538. 
Hook. Fl. Bor.-Am. 1. 167 ; Comp. Bot. Mag. 1. 24. Don, Mill. 2. 513. Beck, Bot. 
96. Spach, Hist. Veg. 1. 399. Loud. Arb. 2. 704, £ 411, a 
P. hiemalis. Elliott, 1. 542. 
Var. mollis. Torr. & Gray, FI. 1. 307. 
? P. Canadensis. Linn. Spec. 2 ed. 678. Willd. Spec. 2. 986. Poir. Dict. 5. 665. 
Persoon, 2. 384. Pursh, 330. Torrey, Fl. U. S. 468. Dietr. 3.42. Suppressed by 
Torr. & Gray, Fl. 1. 408. 
P. hiemalis. Michx. Fl. 1. 284. Poir. Dict. 5. 679. Persoon, 2. 35. Loisel. in 
Nouv. Duham. 5.184. Spreng. Syst. 2.477. Spach, Hist. Veg. 1. 398. Roem. 
Syn. Monog. 3. 59. 
Cerasus Canadensis. Loisel. in Nouv. Duham. 5.3. Seringe, DC. Prodr. 2. 539. 
Don, Mill. 2.515. Beck, Bot. 97. Spach, Hist. Veg. 1.417. Eat. & Wr. 189. 
Loud. Arb. 2. 713. 
P. mollis. ‘Torrey, Fl. U. 8. 470. Beck, Bot. 95. 
Cerasus hiemalis. Seringe, DC. Prodr. 2.538. Hook. Fl. Bor.-Am. 1. 168. Beck, 
Bot. 96. Loud. Arb. 2. 704. Don, Mill. 2. 504. 
Cerasus Americana. Hook. Comp. Bot. Mag. 1. 24. 
Padus Canadensis. Roem. Syn. Monog. 3. 88. 
P. Andersoni. Gray, Proc. Am. Acad. 7. 337 & 10. 70. Anderson, Cat. Pl. Nev. 
120. Watson, King’s Rep. 5. 79. Brew. & Wats. Bot. Calif. 1. 168. 
