449 



Sepals and petals greenish-y: filaments 

 naked. 



A. MACOUITII P 5:3. 



A. MACSGFHYLLUM Pursh, Fl 1:267. 

 Hook, Fl 1:112 t 38. Nutt, Sylva 2:77 t 

 67. Newberry, Pacific Ry R 6:21. B 

 1:107, 2: 439. Z 2:156, 257. Da 5. 

 Greene, Cal ac b 2:393, Cruz. Ab 240. 

 A. MODOCENSE P 5:4. 

 A. NEOMEXICANTJM P. 5:3. 

 ACER PLATANOIDES L. 

 ACER PSEUDO-PLATANUS L. 

 A. SUBSERBATUM P 5:1. 

 A. TORRE YI P 5:2. 



A. TBIFARTITT7M Nutt, ex T & G, Fl 

 1:248; Sylva 2:85 t 71. B 1:108 as A. 

 glabrum. P 5:1. 



ACERATES Ell sketch 1:316 (1817).= 

 Gomphocarpus R. Br fide IK. 

 A. ATROFURPTTBEA K 1:65 (1854- 

 1859): reprint 69. B 1:477 as G. cordi- 

 folius (also Ctirran, Cal ac b 1:142. 

 A. COBDIFOL.IA Benth, PI Hartw 323. 

 B 1:477 as G. cordifolius. 

 A. LATIFOI.IA T, in Fremont r 317. B 

 1:476 as Asclepias crytoceras. 

 A. TOMENTOSA T, in bot Mex bound 

 160 t 44. B 1:477 as G. tomentosus. 

 ACHILLEA L, Syst ed 1 (1735). 



Per herbs, with finely dissected Ivs, 

 and sm hds of both tubular and ligulate 

 fls corymbose at the ends of the st and 

 branches: inv ovoid or campanulate, its 

 bracts compressed, imbricated in few sr: 

 receptacle flat or convex, chaffy; chaff 

 membranous, subtending the disk-fls: 

 ray-fls w or pink, pistillate: disk-fls per- 

 fect, fertile, y: ak oblong or obovate, 

 slightly compressed: pappus o. Yarrow, 



A. ARENXCOX.A M 1:61. 



A. LANATA Pursh. B 1:381 as Bahia 



lanata. 



A. LANULOSA Ab 435. 



Pubescent or nearly glabrous, simple 

 or corymbosely branched above, 3-6 dm 

 hi; basal Ivs and those of the sterile 

 shoots petioled, those of the st sessile, 

 all narrowly oblong or lanceolate in 

 outline, finely dissected into narrow 

 pinnatifid seg; hds num, 4-6 mm 

 broad, in terminal compound dense 

 corymbs; rays 4-6 w. 



A. MZIiIiEFOIiIUM L, Sp PI 899. B 1: 

 400. Da 10. Greene, Cal ac b 2:404, 

 Cruz. Br. 1:213, Rosa Par 98. P 1:90 

 Mig. 



ACKI.YS D C, Syst 2:35 (1821). 

 A. TBIFHYtLA DC Syst 2:35. B 1:16. 

 Z 2:266. 



ACHOMANES Necker. P 4:104. 

 A. MEMBBAWACEUM P 4:104 as Tri- 

 chomanes m. 



ACKYBACHAENA Schauer, Del Sem 

 Hort Vratisl 1837, 3, ex Linnae 12 

 (1838) Litt 87. A 1:247 d. 

 A. MOLLIS Schauer; DC, Prodr 5:292. 

 B 1:371 d. Da 9. A 1:247 d. Greene, 

 Cal ac b 2:403, Cruz. Ab 425. 



Throughout California; Baja! Cruz. 

 ACHYBAKTTHES L, Gen ed 1, 34 

 (1737). 



A. LANUGINOSA Nutt, Fl Ark 166. B 2: 

 43 as Cladothrix lanuginosa. 

 ACHYBOHYCHIA T & G, Am ac pr 7: 

 330 (1868). 



450 



A. COOFEBI G 7:331. B 1:73. Z 1:231. 



A. BZXFOBDIX T. S. Brandegee, Z 1: 



230. Type locality Owen's valley, Inyo 



Co, Cal (Mr. G. P. Rixford). 



ACONITT7M Tourn ex L, Syst ed 1 



(1735). 



A. CCS.TIMBIANUM Nutt, T & G Fl 



1:34. B 2:428. Z 2:161. B 1:12 as A. 



Fischeri. Par 334 t. 



A. riSCHEBX Reichb, Mon Aeon t 22. 



B 1:12; 2:428, Cal plant as A. Columbia- 



num. Siberia. 



A. NAFELI.US Par 334. 



A. HASUTAM Hook, Fl Bor Am 1:26. 



B 1:12 as A. Fischeri. =A. columbianum. 



ACOTJRTIA D. Don, in L, Soc tr 16:203 



U830).=Perezia Lag fide IK. 



A. MICROCEPHALA DC Prodr 7:66. B 



1:422 as P. microcephala. 



ACBOIiASIA Rydberg. 



A. FARVIFZ.OBA M 1:138, based on 



Mentzelia parviflora Heller, Torr cl b 



25:199 (1898). 



ACTAEA Tourn, L, Syst ed 1 (1735). A 



1:257 d. 



A. ABCHJTA Nutt. T & G Fl 1:35. P. 



3:84. B 1:12 as var. of A. spicata. 



A. SFICATA L, Sp PI 504. B 1:12. A 



1:257 d. 



Variety ABGUTA B 1:12. A 1:257 d. 



Fr w or r, in a loose more elongated 

 raceme. Japan; Alk; SF; Eu; Sib; BC; 

 NM. 



ACl'INELLA Nutt, Gen Am 2:173 

 (1818). P 3:265 as Tetraneuris Greene. 

 A. ACAUZ.IS Nutt, Gen Am 2:173. P. 

 3:265 as T a. 



A. ABG-ENTEA G, Mem Am ac 4:100 

 (1849). P 3:269 as T. a. 

 A. BIENRTS G, 13:373 (1878). P 3:272 

 in part as Picradenia b. 



A. BBANDEGEI T. C. Porter, ex G 13: 

 373 (1878). P 3:270 as Rydbergia gla- 

 brata. 



A. COOFEBI G 7:359 (1868). P 3:272 as 

 Picradenia C. B 1:394. 

 A. DEPRESS A Harv & Gray, ex G, mem 

 Am ac 4:100 (1849). P 3:266 as T. d. 

 A. GLABRA Nutt in Am phil soc tr, n s, 

 7:37! (1841). P 3:268 as T. g. 

 A. GX. ABBA A. Nelson, Fl Wyo 137. P 

 3:265 as T. Torreyana. 



A. GBANDIFZ.OBA T & G Bost J nat 

 hist 5:110 (1847). P 3:270 as Rydbergia 

 S- 



Variety GLAEBATA Porter & Coulter, 

 Fl Colo 76 (1874). P 3:270 as Rydber- 

 gia glabrata. 



A. LANATA Nutt, Am phil soc tr, n s, 

 7:379 (1841). P 3:265 as T. 1. 

 A. Z.EFTOCI.ADA G, Pacific Ry R 4:107. 

 P 3:269 as T. 1. 



A. LINEAEIFOLIA T & G, Fl 2:383. = T. 

 1 of P 3:269. 



A. ODOBATA G, Mem Am ac 4:101 

 (1849). P 3:273 as Picradenia o. 

 A. RICHARDSONII Nutt, Am phil soc tr, 

 n s, 7:379 (1841). B 1:394. P 3:271 as 

 Picradenia R. B 1:384. 

 Variety BIENNIS. 



A. BTTSBYX G 19:33 (1883). P 3:271 as 

 Picradenia R. 



A. SCAFOSA Nutt, Am phil soc tr, n s, 

 7:379 (1841). P 3:266 as T. s. 

 Variety LINEARIS Nutt, Am phil soc tr, 

 n s, 7:379. P 3:267 as T. 1. 



