662 FLOXA. 



2. Megapteriutn Fremontii (S. Wats.) Britton. FREMONT'S PRIMROSE. 

 (I. F. f. 2600.) Stems ascending, 5-15 cm. high, appressed-pubescent. Leaves 

 lanceolate to somewhat oblancolate, acuminate at the apex, entire or very nearly 

 so, silvery canescent, 3-5-7-5 cm. long; flowers 2.5-5 cm. broad; calyx-tube 4-5 

 times the length of the ovary; capsule oblong, broadly winged, rounded at the 

 summit. Kans. to Tex. Summer. 



3. Megapteriurn Oklahomense Norton. Glabrous. Stems or branches 

 1.5-3 dm. long; leaves rather numerous, lanceolate or almost oblong, 3-9 cm. 

 long, remotely toothed or merely undulate; calyx-tube 8-10 cm. long; calyx- 

 segments purple. spotted; corollas 45 cm. broad; capsules oblong, 2.5-3 cm - l n &> 

 the wings less than I cm. broad. On prairies and hillsides. Kans. and Okla- 

 homa. Summer. 



16. GALPINSIA Britton. 



Perennial herbs or shrubby plants with much-branched stems. Leaves alter- 

 nate. Flowers yellow, axillary. Calyx-tube slender, longer than the ovary. 

 Ovary 4-celled, elongated; stigma disk-like, entire. Capsules elongated, narrowed 

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

 Salpingia.~\ About 4 species, in the southern U. S. and Mex. 



I. Galpinsia Hartwegi (Benth.) Britton. HARTWEG'S PRIMROSE. (I. F. f. 

 2601.) Canescent or pubescent, much branched, 1.5-4 dm. high- Leaves linear- 

 oblong or lanceolate, obtuse or obtusish at the apex, 1.3-5 cm - l n g> entire or 

 slightly repand-denticulate; flowers 1.8-5 cm - broad; calyx-lobes acuminate; 

 petals rhombic -obovate, acutish; capsule nearly sessile, narrowly cylindric, 

 12-25 mm. long, 2-4 mm. thick; seeds obscurely tuberculate. Prairies, Neb. and 

 Colo, to Tex. and northern Mex. May-Sept. 



17. MERIOLIX Raf. 



Biennial or perennial herbs with branched stems or sometimes shrubby. Leaves 

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

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

 Petals often blotched at the base. Stigma disk-like, 4-toothed. Capsules linear, 

 4-angled, sessile. Seeds longitudinally grooved. A monotypic genus. 



i. Meriolix serrulata (Nutt.) Walp. TOOTH-LEAVED PRIMROSE. (I. F. f. 

 2602.) Erect, canescent or glabrate, 1-5 dm. high. Leaves linear-oblong, or 

 lanceolate, sharply dentate or denticulate, 2.5-7.5 cm. long; flowers 12-18 mm. 

 broad; calyx-lobes ovate, acuminate, the tube funnelform, silvery canescent; petals 

 obovate, crenulate; capsule linear-cylindric, canescent, 1.5-3 cm. long, about 

 2 mm. thick, slightly grooved longitudinally. In dry soil, Manitoba and Minn, to 

 Tex. and N. Mex. May-July. 



Meriolix serrulata spinulosa (T. & G.) Small. More robust than the species. 

 Leaves usually more spiny-toothed ; flowers 2.5-5 cm - broad; petals with a dark blotch 

 at the base. Saskatch. to Mo. and Tex. 



18. GAURA L. 



Annual biennial or perennial herbs, with alternate narrow leaves, and white, 

 pink or red flowers in terminal spikes or racemes. Calyx-tube narrow, prolonged 

 beyond the ovary, the limb 4-lobed (rarely 3-lobed). Petals clawed, unequal. 

 Stamens usually 8, declined, each with a small scale at the base. Ovary 4-celled; 

 united styles declined; stigma 4-lobed, surrounded by a cup-like border; ovules 

 usually 4, pendulous. Fruit nut-like, ribbed or angled, indehiscent or nearly so, 

 i-4-seeded. [Greek, proud, some species being showy.] About 18 species, na- 

 tives of N. Am. and Mex. 



Fruit sessile or very nearly so ; flowers spicate. 



Flowers 3-4 mm. broad; stigma little exserted beyond its cup. i. G. parviflora. 

 Flowers 8-10 mm. broad ; stigma exserted beyond its cup. 



Flowers red, turning scarlet: fruit canescent. 2. G. coccinea. 



Flowers white, turning pink; fruit villous. 3. G. biennis. 



Fruit pedicelled; flowers racemose. 



Fruit about 6 mm. long, the body nearly as thick as long. 4. C7. Michauxii, 



