466 ONAGRACEAE 



6. Oenothera L. (Onagra Adans.) 



Flowers small; petals linear, 2-4 mm. broad. I. 0. cruciata. 

 Flowers large; petals 1-3 cm. broad. 



Upper bracts shorter than the pods, deciduous. 2. 0. biennis. 

 Upper bracts as long as or shorter than the pods, persistent. 



Puberulent and with long thick-based hairs. 3. 0. muricata. 



Densely velvety pubescent. 4. 0. Oakesiana. 



i. O. cruciata Nutt. Sandy soil: Me. and Mass. to N. Y. 



Known only as reported from waste land near Hartford and 

 Salisbury, Conn. 



2. O. biennis L. In dry soil: Lab. to Fla., west to the Mis- 



sissippi Valley. 



Common in most parts of the range, usually as a weed. 



3. O. muricata L. Sandy and gravelly soil, Newf. to N. Y. and 



N.J. 



N. J. All along the coastal sands. 



N. Y. Frequent on L. I. and S. I. 



4. O. Oakesiana (A. Gray) Robbins. Sandy soil, Massachusetts 



to N. Y. 



Conn. Sandy soil near the coast. 



N. Y. Cold Spring Harbor and Floral Park, L. I.; frequent on the 

 Hempstead Plains; Fort Schuyler, L. I. Sound; S. I. 



0. grandiflora Ait. is known in our range only from an old specimen collected at 

 Vineland, N. J. and there adventive. 



7. Raimannia Rose. 



Silvery pubescent with appressed or ascending hairs; seeds striate. 1. R. humifusa. 



Glabrous or sparingly hirsute-pubescent; seeds pitted. 2. R. laciniala. 



i. R. humifusa (Nutt.) Rose. On sea-beaches: N. J. to Fla. 



Known in our area only from the sea-beach from Atlantic Co., to 

 Cape May Point, N. J. 



2. R. laciniata (Hill) Rose. In dry sandy soil: S. N. Y. to Pa., 



111. and Neb., south to Fla., Tex. and Mex. ; locally adventive 



northward. 



N. Y. Valley Stream, L. I., and in cultivated soil on S. I., intro- 

 duced from the south. 



N. J. Exclusively south of the " fall-line," almost always as a 

 weed; probably in the pine-barrens only as an adventive. 



Pa. Bucks and Philadelphia counties. 



