3. Steironema radicans (Hook.) A. 
Gray. Trailing Loosestrife. (Fig. 2818. ) 
L.radicans Hook. Comp. Bot. Mag. 1:177. 1836. 
S. radicans A, Gray, Proc. Am, Acad. 12: 63. 1876. 
Stem weak, at first erect, soon decumbent 
or reclined and often rooting at the joints, 
very slender, glabrous, much branched, 1°-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, 1/-4’ long, 4/-1’ wide; 
margins not ciliolate; petioles naked or very 
sparingly ciliolate, 4%’-114’ 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- 
PRIMULACEAE, 
(Vou. Il. 
2. Steironema tonsum (Wood) Bick- 
nell, Southern Loosestrife. (Fig.2817. ) 
L. ciliata var, tonsa Wood, Class-book, 505. 1863. 
Stetronema intermedium Kearney, Bull. Torr. 
Club, 21: 263. 1894. 
Stem erect, 1°-2° high, slender, obtusely 
4-angled, glabrous below, minutely glandu- 
lar-puberulent above. Leaves 2/-3’ long, 
10’’-20’ 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 9/’-10’’ broad, its seg- 
ments cuspidate; capsule shorter than calyx. 
On dry rocks, Virginia to Tennessee and Ala- 
bama, June-July. 
4. Steironema lanceolatum ( Walt.) 
A. Gray. lLance-leaved Loose- 
strife. (Fig. 2819.) 
Lysimachia lanceolata Walt. Fl. Car. 92. 1788. 
L. hybrida Michx. Fl. Bor. Am. 1: 126. 1803. 
Stetronema lanceolatum A. Gray, Proc. Am. 
Acad. 12:63. 1876. 
‘Stem erect, slender, glabrous, simple or 
branched, 6’—3° 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, 1’—5’ long, 2’’-10”’ 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, %’-1 14’ 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. 
