172 
7. ONAGRA MACROSCELES (A. Gray). 
OEnothera macrosceles A. Gray, Pl. Fendl. 43. 1848. 
Northern Mexico. 
8, ONAGRA ARGUTA (Greene). 
OEnothera arguta Greene, Fl. Francis, 212. 1891. 
Southern California, from Monterey southward. I have not 
seen specimens of this plant. 
2, OENOTHERA L. Sp. Pl. 340. 1753. 
Flowers axillary. 
Plants clothed with dense appressed or ascending pobecnnce 
Flowers 2-3 cm. broad; species of the Atlantic Coast. 1. O. humifusa 
Flowers 7-9 cm. broad; species of the Western Gulf 
Coast, 2. O. Drummondii. 
Plants glabrous or rarely clothed with spreading hairs, 3. O. laciniata, 
Flowers in terminal leafy bracted spikes, . 
Spike few-flowered, loose ; bracts ovate; calyx villous. 4. O. heterophylla. 
Spike many-flowered, dense; bracts narrow; calyx silky. 5. O. rhombipetala. 
1. OENOTHERA HUMIFUSA Nutt. 
OEnothera humifusa Nutt. Gen. 1: 245. 1818. 
OLEnothera sinuata var, humifusaT.& G. Fl.N.A.1: 494. 1840. 
Drifting sand along the coast from New Jersey to Florida; 
ranges but little above sea-level. 
z. CRkoitink etal iaeihs Hook. 
OEnothera Drummondii Hook. Bot. Mag. pl. 33761. 1835. 
? OEnothera sinuata var. humifusa A. eee Proc. che Acad. 5° 
158. 1862. 
. Coast of Texas; ranges only a few meters above sea-level. 
3. OENOTHERA LACINIATA Hill. 
OEnothera laciniata Hill, Syst. Veg. 12: 64. 1767. 
OLEnothera sinuata L, Mant. 2: 228. 1771. 
OLEnothera repanda Medic. Act. Acad. Theod. Palat. 3: 198. 
pl.8. 1775. 
Onagra sinuata Moench, Meth. 676. 1794. 
OEnothera prostrata Ruiz & Pavon, Fl, Per. 3: 79. pl. 315. 1802. 
OEnothera minima Pursh, Fl. Am. ue 262. pi. 1S 1814. 
