Steironema. PIIBIULACE.E. 61 



tered small scales or small leaves below, and a cluster or apparent whorl of larger 

 leaves at summit ; these veiny, entire or obscurely serrulate, nearly sessile. 

 Peduncles filiform in some of the upper axils, one-flowered, in spring. Stpuls 

 slender, linear-lanceolate, uuited only at base. Corolla white or pinkish. Capsule 

 with about .5 revolute valve-. Si^eds few, rather large, covered with a white cel- 

 lular-reticulated pellicle, remaining for some time fast on the placenta in a globular 

 mass. — The following are all the known species. 



T. Americana, Pursh. Stem verv naked below, unequally fJ-O-leaved at summit, a 

 span high : leaves lanceolate, acuminate at both end^ : divisions of the white corolla finely 

 acuminate. — Bart. Fl. Am. Sept. ii. t. 47. T. Enropaa,'Si\chiL. T. Europcca, yar. Amn-i- 

 caiia, Pers., & var. iiiv/H.stif;i';ii, Torr. Fl. 1. oJ3. — Damp wood^, from Labrador to the Sas- 

 katchewan and the mountains of Virginia. 

 T. BuTopEea, L. Stem either naked or with a few scattered leaves below the cluster of 

 obovate or lanceolate-oblong obtuse or abruptly somewhat pointed leaves : divisions of the 

 white or pink corolla abruptly acuminate or mucronate. — Alaska, &e. (Eu. to X. E. Asia.) 



--> Var. arctica, Ledeb. Very like small specimens of the Old U'orld plant, 2 to i 



inches high, with obtuse or retuse leaves, the larger barely an inch long, and gradually 

 decreasing ones down the upper part of the stem : corolla wlute. — T. arctica, Fischer in 

 Hook. Fl. ii. 121. T. Europaa, Cha.m. & Sehlecht. — Mountains of Oregon to Aleutian 

 Islands and Behring Straits. 



■ ■ Var. latifolia, Torr. Stem naked below In the manner of T. Americana ; the whorl 



or cluster of 4 to 7 oblong-obovate or oval mostly acute leaves (1-J- to 4 inches long), rarely 

 proliferous: corolla from white to rose-red. — Pacif. R. Exp. iv. 11^: Gray, Bot. Calif. 

 1. 469. T. latifolia. Hook. 1. e. — ^^'oods, AV. California to Vancouver's Island. 



7. STEIRONEMA, Eaf. (From GTcr<jn,\ sterile, and n,ua, thread, refer- 

 ring to the presence of staminodia alternating with the fertile 'stamens.) — 

 Leafy-stemmed perennials, glabrous except the ciliate petioles, destitute of glands 

 or dots ; the leaves all opposite, but mostly in seeming whorls (in the manner of 

 Trientalis) on the flowering branches : the slender peduncles as in Trientalis : so 

 also the corolla except that it is yellow. Filaments and bottom of the corolla 

 granulose-glandular. Fl. summer. — Eaf. in Ann. Gen. Phys. Bnixelles, vii. (Is2i)) 

 192; Baudo in Ann. Sci. Nat. ser. 2, xx. 346; Gray in Proc. Am. Acad. xii. 

 62. Lysimachia § Sdeacia, Bigel. Bost. ed. 2, 74. LysimacMa § Steironema, Gray, 

 Man. ed. 1, 280. 



* Leaves membranaceous, pinnately veined even when linear, at least the lower ones petioled: 

 corolla sulphur-yellow. 



S. ciliatum, Raf. Stem erect, 2 to 4 feet high, mostly simple: leaves ovate-lanceolate 

 or oblong-ovate, gradually acuminate (5 to 2 inches long), and mostly with rounded or 

 subeordate base, minutely ciliate ; the long petioles hirsutely ciliate : corolla exceeding the 

 calyx, about three quarters inch in diameter. — Gray, Proc. Am. Acad. I.e. Lysimachia 

 ciliata, L. ; Engl. Bot. t. 2022, & ed. Syme, t. I.j4:3 ; Reichenb. Ic. Germ. xvii. 1 1086. ' L. quad- 

 rifolia, var., L. Syst. & Mant. — Low grounds and thickets, Xova Scutia to Georgia, and 

 west to Br. Columbia and Xew Mexico. (Sparingly nat. in Eu.) 

 ■ S. radicans, Gray. Stem slender and branching, soon reclined, the weak long branches 

 often rooting in the mud : leaves smaller than in the foregoing, especially on the branches, 

 not at all cordate, not ciliate, the margined petioles slightly so : calyx-lobes broader (ovate- 

 lanceolate) and equalling the corolla, which is only a third of an inch in diameter. — Lysi- 

 machia radicans. Hook. Comp. Bot. Mag. i. 177. — Swamps, W. Virginia to Arkansas and 

 Louisiana. 

 S. lanceolatum, Gray. Stems erect, a foot or two high, simple or paniculately branched, 

 somewhat angled : leaves lanceolate or linear, an inch or two long, tapering into a short 

 and margined ciliate petiole or attenuated base ; the radical and sometimes lowest cauline 

 from oblong to orbicular, small : coroUa about two thirds inch in diameter ; its divisions 



