330 PRIMULACE^E. (PRIMROSE FAMILY.) 



6. STEIRONEMA, Raf. 



Calyx 5-parted Corolla rotate, with no proper tube, deeply 5-parted, the 

 sinuses rounded ; divisions ovate, cuspidate-pointed, erose-denticulate above, 

 each separately involute arouud its stamen. Filaments distinct or nearly so 

 on the ring at base of corolla, alternating with 5 subulate staminodia; anthers 

 linear. Capsule 10-20 seeded. Leafy -stemmed perennials, glabrous except 

 the ciliate petioles, not punctate, the leaves all opposite, but mostly in seeming 

 whorls on the flowering branches. Peduncles slender, axillary, bearing yellow 

 flowers. (From art^pos, sterile, and v~i/j.a, thread, referring to the staminodia.) 



1. S. Ciliatum, Raf. Stem erect (2-4 high); leaves lanceolate-ovate 

 (2-6' long), tapering to an acute point, rounded or heart-shaped at base, all on 

 long and fringed petioles ; corolla longer than the calyx. (Lysimachia ciliata, 

 L.) Low grounds and thickets, common. July. 



2. S. radicans, Gray. Stem slender, soon reclined, the elongated branches 

 often rooting in the mud ; leaves ovate-lanceolate, mostly rounded at base, on 

 slender petioles ; corolla about the length of the calyx. (Lysimachia radicans, 

 Hook.) Swampy river-banks, W. Va. to Ark. and La. Leaves and flowers 

 nearly one half smaller than in the last. 



3. S. lanceolatum, Gray. Stem erect (10'- 2 high); leaves lanceolate, 

 varying to ublony and linear, narrowed into a short margined petiole or tapering 

 base, or the lowest short and broad 011 long petioles. (Lysimachia lanceolata, 



Walt.) Low grounds and thickets, Ont. to Fla., Dak., and Tex. Polymor- 

 phous; the extremes are var. HYBRIDUM, Gray, with cauline leaves from ob- 

 long to broadly linear, common north and west, and var. ANGusTiF6LHjM, 

 Grav, with stems more branched, a span to 2 high, and the cauline leaves 

 linear, acute at both ends, more sessile, 1 -2" broad ; mainly southward. 



4. S. longifolium, Gray. Ste?n erect, 4-angled, slender (1-3 high), 

 often branched below; stem-leares sessile, narrowly linear, elongated (2-4' 

 long, 2-3" wide), smooth and shining, rather rigid, obtuse, the margins often 

 a little revolute, the veins obscure; the lowest oblong or spatulate; corolla 

 (8-9" broad) longer than the calyx, the lobes conspicuously pointed. (Lysi- 

 machia longifolia, Pursfi.) Banks of streams, from western N. Y. to Va., 

 Minn., and Iowa July - Sept. 



7. LYSIMACHIA, Tourn. LOOSESTRIFE. 



Calyx 5-6-parted. Corolla rotate, the divisions entire, convolute in bud. 

 Filaments commonly monadelphous at base; anthers oblong or oval ; stami- 

 uodia none. Capsule few -several-Seeded. Leafy -stemmed perennials, with 

 herbage commonly glandular-dotted. (In honor of King Lysimachus, or from 

 \vo~ts, a release from, and f^dx?), strife.) 



1. LYSIMACHIA proper. Corolla yellow, rotate, and very deeply parted, 

 and with no teeth between the lobes; stamens more or less monadelphous, often 

 unequal ; leaves opposite or wliorled, or some abnormally alternate. 



* Flowers (middle-sized) in a terminal leafy panicle; corolla without marks. 



L. VULGARIS, L.,a coarse and tall European species, pubescent and branch- 

 ing, with ovate-lanceolate distinctly petioled leaves, and glandular filaments 

 united to near the middle. Naturalized in a few places in E. Mass. 



