LIST OF NEW GENERA, SPECIES, AND HYBRIDS, AND NEW NAMES. 
Page 
Oreolirion arizonicum (Rothr.) Bicknell................... wee eee eee wee. 147 
Sisyrinchium arizonicum Rothr. 
Quercus emoryiXpungens Woot. & Standl.................2..2.2.2..202- 169 
Quercus grisea X emoryi Woot. & Standl.................0..00222222.200 2 ee 170 
Quercus arizonica Xgrisea Woot. & Standl..................22-2.-2--..2-. 171 
Razoumofskya microcarpa (Engelm.) Woot. & Standl.......... wee eee eee 179 
Arceuthobium douglasii microcarpum Engelm. 
Alsine cuspidata (Willd.) Woot. & Standl................... Lecce cece eeeee 236 
Stellaria cuspidata Willd. 
Radicula terrestris (R. Br.) Woot. & Standl....................22.2022000-. 284 
Nasturtium terrestre R. Br. 
Chamaecrista wrightii (A. Gray) Woot. & Standl..................0.00.0.2. 335 
Cassia wrighttt A. Gray. 
Astragalus proximus (Rydb.) Woot. & Standl.......................2.22-- 366 
Homalobus prorimus Rydb. 
Astragalus impensus (Sheld.) Woot. & Standl............020.0 000020000... 369 
Astragalus viridis impensus Sheld. 
Oxytropis richardsoni (Hook.) Woot. & Standl.............222...2..0.0.22. 370 
Oxytropis splendens richardsoni Hook. 
Oxytropis pinetorum (Heller) Woot. & Standl....................2...22... 371 
Aragallus pinetorum Heller. 
Oxytropis vegana (Cockerell) Woot. & Standl..................0.0.0.002.. 371 
Aragallus pinetorum veganus Cockerell. 
Polygala parvifolia (Wheelock) Woot. & Standl............-.2.222...2.2.2. 392 
Polygala lindheimeri parvifolia Wheelock. 
Tithymalopsis strictior (Holzinger) Woot. & Standl................. se eeeee 396 
Euphorbia strictior Holzinger. 
Stillingia smallii Woot. & Standl...............20222002 22.20.00 eee cece ee 405 
Stillingia salicifolia Small, 1903, not Baill. 1865. 
Trionum trionum (L.) Woot. & Standl.. a OW 
MNbiscus trionum L. 
Hibiscus involucellatus (A. Gray) Woot. & Standl..........22020........... 417 
Hibiscus denudatus involucellatus A. Gray. 
Sidanoda (Robinson) Woot. & Standl................... wee cece eee eee e eee 427 
Anoda section Sidanoda Robinson. 
Sidanoda pentaschista (A. Gray) Woot. & Standl...........22...2.... weeeee 427 
Anoda pentaschista A. Gray. 
Echinocereus rosei Woot. & Standl.........2..........2.000 2c e eee eee eee 457 
Echinocereus polyacanthus Engelm. err. det. Standley, 1908. 
Raimannia mexicana (Spach) Woot. & Standl.............00.00............ 470 
Oenothera mexicana Spach. 
Acerates ivesii (Britton) Woot. & Standl.............2..2.022..0... eeeeeee 509 
Asclepias viridiflora ivesii Britton. , 
Nyctelea micrantha (Torr.) Woot. & Standl.................00.0 0220.02.00... 535 
Phacelia micrantha Torr. 
Diapedium torreyi (A. Gray) Woot. & Standl.............0...0.0..00.-200-- 598 
Dicliptera torreyt A. Gray. 
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