Vox,. II.] 



EVENING-PRIMROSE FAMILY. 



495 



2. Megapterium Fremontii (S. Wats.) Britton. 



(Fig. 2600.) 



Fremont's Primrose. 



OEnothera Fremontii S. Wats. Proc. Am. 



Acad. 8: 587. 1873. 

 Megapterium Fremontii Britton, Mem. Torr. 



Club, 5: 236. 1894. 



Tufted, stems mostly simple, ascending, 

 2 / -6 / high, densely appressed-pubescent or 

 canescent. Leaves lanceolate to somewhat 

 oblanceolate, acuminate at the apex, nar- 

 rowed at the base into a slender petiole, en- 

 tire or very nearly so, silvery canescent, 

 !%'-$' long, 2 // -4 // wide; flowers yellow, 

 axillary, i / -2 / broad; calyx-lobes broadly 

 lanceolate, acuminate, spreading, the tube 

 canescent, very slender, 4-5 times the length 

 of the ovary; capsule ovate, canescent, 

 broadly winged, rounded at the summit, 

 about 8" long and 6" wide, short-stalked; 

 seeds not tuberculate. 



Kansas to Texas. Summer. 



16. GALPINSIA Britton, Mem. Torr. Club, 5: 236. 1894. 



[SALPINGTA Raimann, in Engler & Prantl, Nat. Pfl. Fam. 3: Abt. 7, 217. 1893. Not 



Salpinga DC.] 



Perennial caulescent herbs or shrubby plants with much branched or tufted stems. 

 Leaves alternate, entire or toothed. Flowers perfect, yellow, axillary. Calyx-tube slender, 

 narrowly funnelform, longer than the ovary; calyx-segments narrow, the tips free in the 

 bud. Petals 4, spreading. Stamens 8, equal in length; filaments filiform; anthers linear. 

 Ovary 4-celled, elongated; united styles filiform; stigma disk-like, entire. Capsules elon- 

 gated, narrowed at the base, more or less curved. Seeds sometimes tuberculate. [Anagram 

 of Salpingia.~\ 



About 4 species, in the southern United States and Mexico. 



i. Galpinsia Hartwegi (Benth.) Britton. Hart- 

 vveg's Primrose. (Fig. 2601.) 



OEnothera Hartwegi Benth. PI. Hartw. 5. 1839. 

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

 Galpinsia Harlwegi. Britton, Mem. Torr. Club, 5: 236. 1894. 



Somewhat woody, canescent or pubescent, much branched, 

 the branches decumbent or ascending, 6'- 15' long. Leaves 

 linear-oblong or lanceolate, obtuse or obtusish at the apex, 

 mostly rounded at the base, and sessile, 6"-2' long, i>^ // -3 // 

 wide, entire or slightly repand-denticulate; flowers axillary, 

 yellow, 9 // -2 / broad; calyx-lobes linear-lanceolate, acuminate, 

 reflexed-spreading, the tube dilated above, many times longer 

 than the ovary; petals rhombic-obovate, acutish; stigma dis- 

 coid; capsule nearly sessile, narrowly cylindric, canescent, 

 6"-i2" long, i // -2 // thick; seeds obscurely tuberculate. 



Prairies, Nebraska and Colorado to Texas and northern Mex- 

 ico. May-Sept. 



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. 



A monotypic genus of temperate North America. 



