330 PfclMULACE^E. (PRIMROSE FAMILY.) 



6. STEIRONEMA, Kaf. 



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 around 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 trrelpos, sterile, and vr^ia, thread, referring to the staminodia.) 



1. S. Cili&tum, 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 ; leares 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 oblong and linear, narrowed into a short margined petiole or tapering 

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

 Walt. } Low grounds and thickets, Ont. to Fla , the Dakotas, and Tex. Poly- 

 morphous; the extremes are var. H{'BRIDUM, Gray, with cauline leaves from 

 oblong to broadly linear, common north and west, and var. ANGusxiF6LiuM, 

 Gray, 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. Stem erect, 4-angled, slender (1-3 high), 

 often branched below; stem-leaves 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, Pursh.) 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 

 nodia none. Capsule few - several-seeded. Leafy-stemmed perennials, with 

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

 \vvis, a release from, and ju^x 1 ?* 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 whorled, 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. 



