GENUS 16. 



EVENING-PRIMROSE FAMILY. 



607 



i. Galpinsia lavendulaefolia (T. & G.) Small. Lav- 

 ender-leaved Primrose. Fig. 3065. 



Oenothera lavendulaefolia T. & G. Fl. N. A. i : 501. 1840. 

 Galpinsia lavendulaefolia Small, Fl. SE. U. S. 845. 1903. 



Somewhat woody, canescent, much branched, the branches 

 decumbent or ascending, slender, 6'-i5' long. Leaves linear- 

 oblong or lanceolate, acutish at the apex, sessile, 6"-2' long, 

 ii"-2" wide, entire or slightly repand-denticulate ; flowers 

 axillary, yellow, i'-2' broad; calyx-lobes lanceolate to linear- 

 lanceolate, acuminate, reflexed-spreading, the tube dilated 

 above, many times longer than the ovary; petals rhombic- 

 obovate ; stigma discoid ; capsule nearly sessile, narrowly 

 cylindric, canescent, 6"-i2" long, i"-2" thick. 



Prairies and plains, Nebraska and Wyoming to Texas and Ari- 

 zona. May-Sept. Included in our first edition in G. Hartwegi 

 (Benth.) Britton, of the southwestern states and Mexico. 



2. Galpinsia interior Small. Oblong-leaved Primrose. 

 Fig. 3066. 



Galpinsia interior Small, Fl. SE. U. S. 845. 1903. 



Somewhat woody, hirsute-pubescent, or tomentose, branched, 

 i high or less, erect or ascending. Leaves oblong to oblong- 

 lanceolate, entire, or nearly so, acute or obtuse at the apex, 

 sessile by a somewhat clasping base, about i' long; calyx 

 more or less hirsute, its lobes lanceolate, acuminate, 5"-8" 

 long; petals i'-i' long; capsules hirsute, 7"-io" long. 



On plains and stony hills, Nebraska and Kansas to Texas. June- 

 Aug. 



17. MERIOLIX Raf. Am. Month. Mag. 4: 192. 1818. 



Biennial or perennial herbs with branched stems which sometimes become shrubby. 

 Leaves alternate, narrow, entire or sharply serrate. Flowers perfect, regular, axillary, yellow. 

 Calyx-tube funnelform, shorter than the ovary; calyx-segments narrow, keeled on the back, 

 the tips free in the bud. Petals 4, often blotched at the base. Stamens 8, equal in length ; 

 filaments filiform ; anthers narrow. Ovary 4-celled, 4-angled ; stigma disk-like, 4-toothed ; 

 ovules numerous. Capsules linear, 4-angled, 4-celled, sessile. Seeds longitudinally grooved. 

 [Name unexplained.] 



Three or four species of temperate North America, the following typical. 



