2(1). Principal leaves ovate or ovate-lanceolate, with rounded or cordate base 

 with a distinct petiole 2. L. ciliata. 



2. Principal leaves linear to linear-lanceolate, gradually tapering at base 



3. L. lanceolata. 



1. Lysimachia radicans Hook. Fig. 614. 



Stem slender, soon reclined, to 1 m. long, laxly and diffusely branched, the 

 elongated branches often rooting at the nodes; leaves membranous, with a slender 

 narrowly winged bristly-ciliate petiole to 3 cm. long; blade ovate-lanceolate to 

 lanceolate, to 9 cm. long and 25 mm. wide, rounded at base, acuminate at apex; 

 pedicels filiform, to 3 cm. long; flowers nodding, to 12 mm. wide; calyx segments 

 ovate-lanceolate, acuminate, 3-5 mm. long; corolla segments obovate-cuneate, 

 erose-dentate and cuspidate; capsule exceeding the calyx. Steironema radicans 

 (Hook.) Gray. 



In swamp forests, along streams and in moist pinelands in s.e. Tex., May-July; 

 from Miss, to Tex., n. to Mo., Tenn. and locally to e. Va. 



2. Lysimachia ciliata L. 



Stem erect, simple or branched, 12 dm. high from a slender rhizome; leaves 

 ovate to ovate-lanceolate, acuminate, broadly rounded to subcordate at the base, 

 the blades to 15 cm. long with long ciliate-fringed petioles; flowers on thin axillary 

 peduncles, mostly whorled, to 28 mm. wide; calyx segments firm, subulate-tipped, 

 to 1 cm. long; corolla yellow, not spotted, its broad segments cuspidate and erose- 

 dentate; capsule exceeding or shorter than the mature calyx. Steironema pumilum 

 Greene, 5. ciliatum (L.) Raf. 



Swamps, seepage, marshes, low ground, thickets, rich woods and shores in n.e. 

 Tex., Ozarkian Okla. {Waterfall), N.M. (San Miguel, Socorro and Grant cos.) 

 and Ariz. (Apache, Navajo, Coconino and Gila cos.), June-Sept.; from s. Can. to 

 Fla., Tex., Ariz, and Colo. 



The plant with relatively narrow obscurely ciliolate leaves is usually segregated 

 as var. validula (Greene) Kearn. & Peeb. {Steironema validulum Greene). 



3. Lysimachia lanceolata Walt. Fig. 612. 



Stems slender and firm, from elongate slender cordlike rhizomes and stolons, to 

 7 dm. tall, simple or with ascending branches; basal leaves often rosulate and long- 

 petiolate, elliptic to oblong-elliptic, usually persistent; middle and upper leaves 

 linear or linear-lanceolate, to 13 cm. long and 15 mm. wide, attenuate to the usually 

 short-petiolate bristly-ciliate base, acuminate at apex, paler beneath; pedicels fili- 

 form, to 4 cm. or more long at anthesis, from upper axils; flowers to 2 cm. wide; 

 calyx segments firm, linear-lanceolate, acuminate, to 7 mm. long; corolla segments 

 suborbicular to broadly obovate, erose, cuspidate; filaments equaling or longer than 

 anthers; capsule shorter than the calyx. Steironema lanceolatum (Walt.) Gray. 



Dry or moist open woods, in thickets, sometimes in or about water of lakes, 

 seepage and streams, swamps and wetlands generally, in Okla. {Waterfall) and e. 

 Tex., May-July; from Fla. to Tex., n. to Pa., O., w. to Mich, and Wise. 



A plant segregated as L. hybrida Michx. [L. lanceolata subsp. hybrida (Michx.) 

 Ray] has been reported from our region. It is considered to be closely allied to 

 L. lanceolata from which it diff'ers in having a thicker, more robust stem with 

 longer internodes, basal offshoots and nonpersistent essentially sessile basal leaves, 

 no cordlike rhizomes, and a more open-paniculate inflorescence. The leaves are 

 also green on both surfaces instead of being pale-green or somewhat glaucous 

 beneath as in L. lanceolata. 



1292 



