ONAGARLE. 119 



yays smooth, oblong and 4 winged ; raceme naked below. (E. fru- 

 dcosa var. ambigua Nutt. 



HAB. Hills and dry woods. N. Y. Penn. Bart. July. 2/. 

 Stem a foot or more high, simple. Flowers pale yellow, smaller 

 than in (E. fruticosa. 



8. (E. incana Nutt. : stem slender, erect ; leaves flat, hoary and to- 

 mentose, . very entire, elliptic-ovate, acute; raceme few-flowered, 

 naked ; capsule subsessile, oblong and square. 



HAB. Dry woods. N. Y. and Mar. Stem 6 8 inches high. 

 Floioers bright yellow. Dr. Torrey supposes it to be a variety 

 of (E. fruticosa. 



9. (E. hylrida Mich. : stem erect, villous ; leaves pubescent on both 

 sides, lanceolate, remotely toothed, undulate ; capsules somewhat 

 spiked, on short foot-stalks, ovate, 4-angled. 



HAB. Old Fields. Penn. Darlington. S. to Geor. July- 

 Sept. It. Stem 918 inches high. Floicers pale yellow. 

 Tube of the calyx 3 or 4 times as long as the segments. 



10. (E. pumila Linn. : stem weak, smooth or slightly hairy ; leaves 

 oblong-lanceolate, very entire, obtuse, flat ; flowers small, in a termi- 

 nal raceme ; segments of the calyx longer than the tube ; capsule sub- 

 sessile, 8-angled.' (E. chrysantha Mich. 



HAB. Dry fields. N. S. to Car. July. U.Stcm812 inches 

 high. Floicers small, bright yellow. '. 



11. (E. pusitta Mick. : subpubescent ; stem nearly .simple ; leaves 

 lanceolate-oblong, somewhat obtuse, entire ; flowers axillary at the 

 summit; capsule sessile, clavate-turbinate, almost equally 8-angled. 



HAB. High mountains. Penn. to Virg. Pursh. July, Aug. 

 2_f. Stem 6 8 inches high, erect. Flowers small, yellow. 



12. (E. chrysantha Mich. : stem slender, minutely pubescent ; leaves 

 lanceolate, rather obtuse, flat, entire ; segments of the calyx as long 

 again as the tube ; capsule clavate-sessile, acute, angled. 



HAB. Mountains. Can. and N. S. July. If. Stem a foot 

 high. Flowers small, bright yellow. I am induced to believe 

 that this is not distinct from the former, but that (E, chrysantha, 

 (E. pusilla and (E. canadensis of Goldie, are all mere varieties of 

 the same species, probably (E. pumila of Linneeus. 



4. ISNARDIA. Linn. 



Tube of the calyx ovate or subcylindric, short, adhering to 

 the ovary ; limb 4-parted, persistent. Petals sometimes 4, 

 alternating with the calyx ; sometimes none. Stamens 4. 

 Style filiform, deciduous. Stigma capitate. Capsule obovate 

 or nearly cylindrical, 4-sided, 4-valved, many-seeded. 



Tetrandria. Monogynia. 

 * Petals 4. LUDWIGIA. 



1. 7. alternifolia DC Cand. : stem erect, branched, nearly smooth ; 

 leaves alternate, lanceolate, somewhat scabrous on the margins and 



