Genus 6. 



PRIMROSE FAMILY 



I. Steironema ciliatum (L. j Raf. Fringed 

 Loosestrife. Fig. 3292. 



Lysimachia ciliata L. Sp. PI. 147. 1753. 

 Steironema ciliatum Raf. Ann. Gen. Phys. 7: 192. 

 1820. 



Stems erect, simple or branched, slender, mostly- 

 glabrous, i-4 high. Leaves membranous, ovate, 

 ovate-oblong, or ovate-lanceolate, pinnately veined, 

 acute or acuminate at the apex, obtuse, truncate 

 or cordate at the base, 2'-6' long, -3 viride, the 

 margins ciliolate; petioles ciliate, i'-h' long; 

 peduncles filiform, i'-2' long; calyx-segments 

 lanceolate, acuminate, shorter than the erose- 

 denticulate commonly mucronate corolla-seg- 

 ments; flowers 6"-i2" broad; capsule longer than 

 the calyx. 



In moist thickets. Nova Scotia to British Colum- 

 bia, south to Georgia, Alabama, Kansas, New Mexico 

 and Arizona. Ascends to 6300 ft. in North Carolina. 

 Naturalized in Europe. .fune-.\ug. 



2. Steironema intermedium Kearney. 

 Southern Loosestrife. Fig. 3293. 



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

 Steironema intermedium Kearney, Bull. Torr. 



Club 21 : 263. 1894. 

 5". l}nsum Bicknell ; Britt. & Br. 111. Fl. 2: 590. 



1897. 



Stem erect, i-2 high, slender, obtusely 

 4-angled, glabrous below, minutely glandular- 

 puberulent above. Leaves 2-3' long, io"-2o" 

 wide, ovate to ovate-lanceolate, acute at the 

 apex, obtuse or subcordate at the base, mi- 

 nutely 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 flow- 

 ers; calyx-segments lanceolate, very acute; 

 corolla 9"-io" broad, its segments cuspidate; 

 capsule shorter than caly.x. 



On dry rocks, Virginia to Kentucky, Tennessee 

 and Alabama. June-July. 



3. Steironema radicans (Hook.) A. Gra\ . 

 Trailing Loosestrife. Fig. 3294. 



L. radicans Hook. Comp. Bot. Mag. i : 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, i-3 long. 

 Leaves membranous, pinnately veined, lanceolate 

 to ovate-lanceolate, acute or acuminate at the 

 apex, rounded or narrowed, but not cordate at 

 the base. 1-4' long, i'-i' wide; margins not cilio- 

 late ; petioles naked or very sparingly ciliolate, 

 i'-ii' long; peduncles filiform, -2 long; calyx- 

 segments ovate or lanceolate, acuminate, about 

 equalling the erose-deniiculate corolla-segments; 

 flowers 3"-4" broad; capsule about one-half as 

 long as the calyx. 



In swamps, Virginia and West Virginia to Arkan- 

 sas and Texas. June-.^ug. 



