EVENING PRIMROSE FAMILY. Onagraceae. 



the golden pollen is loosely connected by cobwebby 

 threads, and is transported from flower to flower mostly 

 by moths ; the Isabella tiger-moth (Pyrrharctic Isabella) 

 is chief among the number. The blossoms are also fre- 

 quented by the honeybee and bumblebee ; they usually 

 open just before sundown, and fade in the strong sun- 

 light of the following day ; the sudden opening of the 

 flower in the twilight hour is interesting and remark- 

 able. The soft-hairy plant-stem, leafy throughout, is 

 1-6 feet high. Roadsides and fields everywhere east of 

 the Rocky Mountains. The flower of var. grandiflora, 

 from the southwest, is very large ; the corolla is 3-4 

 inches in diameter. It is commonly cultivated. The 

 var. cruciata has remarkably narrow petals linear and 

 acute ; Mass. , Vt. , and N. Y. 



Oakes's Even= An annual, slenderer than the foregoing 

 ing Primrose species, and not hairy but covered with 

 (Enothera a g^g^t c i ose WO olliness. The calvx-tips 



Oakesiana , , ^ 



Pure yellow not conspicuously close together. Dry 

 July-August situations Mass, and N. Y., west to Neb. 

 (Enoihera ^ ^ ower slightly fine-hairy species with 



ladnata oblong or lance-shaped leaves wavy- 



Pure yellow toothed or often deep-cleft like those of 

 May-July the dandelion ; the small light yellow 



flowers borne at the bases of the leaves turn pinkish in 

 fading. About 1 foot high. In sandy soil, from N. J. 

 south, and west to S. Dak., Kan., and Tex. Also in Vt. 

 according to Britton and Brown, but not recorded by 

 Brainerd, Jones, and Eggleston, in Flora of Vermont. 



A small slightly hairy biennial, with di- 

 Sundrops 

 {Enothera urnal, rather small pure yellow flowers, 



pumila borne in a loose spike or at the bases of 



Pure yellow the leaves, the latter light dull green, 

 May-July toothless and obtuse, lance-shaped but 



broader nearer the tip. 10-20 inches high. In dry sunny 

 fields, from Me. to N. J. , and west to Minn, and Kan. 

 <Enothera glauca A southern species with very large pure 

 May-Septem- yellow flowers lj-2f inches broad, and long 

 ber ovate leaves, wavy-toothed. The smooth 



seed-capsule oblong and with four broad wings. 20-34 

 inches high. In dry mountain woods, Ya. to Ky., south. 

 298 



