208 MISSISSIPPI STATE GEOLOGICAL SURVEY [Bull. 
Ludwigia pilosa Walt. (L. mallis Michx.) Hoary Ludwigia. 
Wet, marshy borders of thickets. Bay St. Louis. July. 
Allison Herb. 
ISNARDIA L. 
Isnardia palustris L. (Ludiwigia palustris Ell.) Water Purslane. 
In miry and marshy places throughout the state. Oxford; 
Jackson; Amite Co. (Allison). June. 
Geol. Sur. Herb. 
ONAGRA  Adans. 
Onagra biennis (L.) Scop. (Oenothera biennis L.) Common 
Evening Primrose. . 
Common in o!d fields, pastures, and cultivated grounds. 
Oxford; Jackson; Winona. June. 
Geol. Surv. Herb. 
OENOTHERA. L. 
Oenothera humifusa Nutt. (O. sinuata humifusa Torr. & Gray). 
Seaside Evening Primrose. 
Sands along the beach and near the coast. Gulfport; 
Biloxi; Petit Bois Island. April. 
Geol. Sur. Herb. 
Oenothera sinuata L. Mant. (O. laciniata Hill). Sinuate-Leaf 
Evening Primrose. 
Dry sandy soil throughout the state. Oxford; Jackson; 
Newton; Tishomingo Co.; Amite Co.; Bay St. Louis (Alh- 
son). April-May. 
Geol. Sur. Herb. 
Oenothera laciniata grandis Britton (O. sinuata grandiflora 
Wats.) 
Northeastern counties (Mohr). September-October. 
Oenothera triloba Nutt. (Lavauxia triloba Spach.) Prairie 
Evening Primrose. 
Common locally on the limestone soils of northeast Missis- 
sippi. Okolona; Wheeler. April-May. 
Geol. Sur. Herb. 
