1 9O NEW YORK STATE MUSEUM 



Northern Evening Primrose 



Oenothera muricata Linnaeus 



Plate 146 



A slender plant resembling the common Evening Primrose but usually 

 less branched and more slender-stemmed, 2 to 3 feet high, the stem puberu- 

 lent and covered with scattered hairs which are enlarged at the base. 

 Leaves lanceolate, mostly narrower than those of Oenothera 

 b i e n n i s, slightly repand-denticulate or entire. Flowers light yellow, 

 i to 2 inches broad; petals rhombic-obovate and blunt at the apex. Cap- 

 sules hairy, narrowly oblong-cylindric, about i inch long, slightly curved 

 and shorter than the persistent leaflike bracts which subtend them. 



Sandy or gravelly soil, Newfoundland to southeastern New York and 

 New Jersey. Flowering from July to September. 



Common Sundrops 



Kneiffia fruticosa (Linnaeus) Raimann 



Plate 1473 



Stems erect, i to 3 feet high and usually more or less branched, hairy 

 or nearly smooth. Leaves lanceolate or broader, sometimes oval-lanceolate, 

 usually pointed at the apex and narrowed at the sessile base, or the lower 

 leaves petioled, the margins repand-denticulate or nearly entire, i to 4 

 inches long. Flowers bright yellow, diurnal, i to 2 inches broad, in terminal 

 leafy-bracted clusters; calyx segments lanceolate, spreading, the tube 

 mostly longer than the ovary; petals four, obcordate or slightly notched 

 at the ends. Fruiting capsules sessile or short stalked, oblong and 

 prominently winged, smooth or pubescent, one-fourth to one-third of an 

 inch long; stamens eight, the alternate ones longer. 



In dry or sandy soil, New Hampshire to Minnesota, south to Georgia 

 and Louisiana. Flowering from June to August. 



Among the closely related species in this State are Kneiffia 

 longipedunculata Small, with club-shaped fruit pods on stalks 

 longer than the body of the pod; leaves narrow but flowers conspicuous; 



