590 



PRIMULACEAE. 



[VOL. II. 



2. Steironema tonsum (Wood)Bick- 

 nell. Southern Loosestrife. (Fig. 28 17.) 



L. ciliata var. lonsa Wood, Class-book, 505. 1863. 

 Steironema intermedium Kearney, Bull. Torr. 

 Club, ai: 263. 1894. 



Stem erect, i-2 high, slender, obtusely 

 4-angled, glabrous below, minutely glandu- 

 lar-puberulent above. Leaves a'-^' long, 

 \of f -iK/ f wide, ovate to ovate-lanceolate, 

 acute at the apex, obtuse or subcordate at the 

 base, minutely ciliolate, otherwise glabrous, 

 the upper much smaller; petioles slender, 

 glabrous, or ciliate only at the base; panicle 

 open, leafy; pedicels slender, 2-6 times as 

 long as the flowers; calyx-segments lanceo- 

 late, very acute; corolla <$"-\Q ff broad, its seg- 

 ments cuspidate; capsule shorter than calyx. 



On dry rocks, Virginia to Tennessee and Ala- 

 bama. June-July. 



3. Steironema radicans (Hook.) A. 

 Gray. Trailing Loosestrife. (Fig. 2818.) 



L. radicans Hook. Comp. Bot. Mag. i: 177. 1836. 

 5". radicans A. Gray, Proc. Am. A cad. ia: 63. 1876. 



Stem weak, at first erect, soon decumbent 

 or reclined and often rooting at the joints, 

 very slender, glabrous, much branched, i-3 

 long. Leaves membranous, pinnately veined, 

 lanceolate to ovate-lanceolate, acute or acumi- 

 nate at the apex, rounded or narrowed, but not 

 cordate at the base, x'-4' long, X'-i' wide; 

 margins not ciliolate; petioles naked or very 

 sparingly ciliolate, X'-itf' long; peduncles 

 filiform, #'-2' long; calyx-segments ovate or 

 lanceolate, acuminate, about equalling the 

 erose-denticulate corolla-segments; flowers 

 3 // -4 // broad; capsule about one-half as long 

 as the calyx. 



In swamps, Virginia and West Virginia to Ar- 

 kansas and Louisiana. June-Aug. 



4. Steironema lanceolatum (Walt.) 

 A. Gray. Lance-leaved Loose- 

 strife. (Fig. 2819.) 



Lysimachia lanceolata Walt. Fl. Car. 92. 1788. 

 L. hybrida Michx. Fl. Bor. Am. x: 126. 1803. 

 Steironema lanceolatum A. Gray, Proc. Am. 



Acad. ia: 63. 1876. 



Stem erect, slender, glabrous, simple or 

 branched, 6'-$ high. Leaves lanceolate, lin- 

 ear or oblong-lanceolate, petioled or nearly 

 sessile, membranous, pinnately veined, acute 

 or acuminate at the apex, usually narrowed 

 at the base, i'-5' long, 2 // -io" wide, the mar- 

 gins naked or ciliate; lower leaves shorter, of- 

 ten oblong or nearly orbicular; petioles 2 // -8 // 

 long, naked or ciliate; peduncles slender or 

 filiform, # / -i/4 / long; calyx segments lanceo- 

 late, acute or acuminate, nearly as long as or 

 exceeding the erose and cuspidate -pointed 

 corolla-segments; flowers 5"-9" broad; cap- 

 sule nearly as long as the calyx-segments. 



In moist soil, Maine to Minnesota, south to 

 Florida, Louisiana and Arizona. June-Aug. 



