Descriptive Flora 



147 



about \y<i inch across, solitary in the axils of the leaves. Petals 

 4, % to 1" broad, shallowly notched at the apex. Stamens 8. 

 Fruit a cylindrical, 4-sided capsule, iy 2 to 2y 2 inches long, 

 crowned by 4 leaflike sepals. June, July and August. Petals 

 fall off readily. 



Oenothera laciniata grandis Britton. Yellow Evening Primrose. 

 (Oenthera sinuata grandiflora Heller.) 



Plant erect when young, branching and spreading later and 

 bearing large, showy, bright yellow 4-petalled flowers that open 

 in the early evening. Upper leaves simple, alternate. Blades 

 oval, oblong, lanceolate or spatulate, 2 to 4 inches long, wavy or 

 variously lobed along the margins. Flowers 2 to 3 inches across, 

 solitary in the axils of the upper leaves, a few opening each day 

 at sundown and closing the following day. Petals 4, thin, broad, 

 united at their bases to a narrow tube (hypanthium) about 2" 

 long. Stamens 8. Stigma divided into 4 linear lobes. Fruit 1 to 

 1 y± long. 4-sided, and when dry splits from the top into 4 parts. 

 March and April. In sandy soil. 



Oenothera laciniata Hill. 

 (Oenothera sinmta L.) 



Similar to Oenothera grandis but corolla smaller, y 2 to iy 2 

 across, leaves small, 1 to 2" long, plants not as tall, ranging from 

 3 to 20". March to July. In sandy soil. 



Lavauxia triloba (Nutt.) Spach. Yellow Evening Primrose. 

 (Oenothera triloba Nutt.) 



These great evening primroses are like lamps lit at dusk 

 or for a while on misty mornings. They are apparently stemless 

 plants with mammoth bright yellow flowers coming out of a tuft 

 of leaves, 3 to 8 inches long, with wavy, coarsely toothed or 

 segmented margins, strongly resembling the well known dande- 

 lion of the north and east. Petals 4, large, flaring out of a 

 narrow tube, 2 to 3 inches long. Stamens 8. Fruit a strongly, 4- 

 winged capsule, y 2 to 1" long, not as broad, buried deep in the 



