10 PRIMULACEiE. Lysimachia. 



4. Lysimachia hybrida, Michx, Hybrid Loosestrife. 



Stem smooth ; leaves opposite, on longish slightly ciliate petioles, lanceolate, acute at each 

 end; peduncles mostly in pairs, one-flowered; flowers somewhat nodding. — Michx. fl. 1. 

 p. 126 ; Pursh,Jl l.p. 136 ; Torr.Jl. 1. ;j. 211 ; Bigel. fl. Bost. p. 75 ; Beck, hot. p. 290 ; 

 Darlingt. fl. Cest. p. 125; Hook. fl. Bor.-Am. 2. p. 122. L. heterophylla, Nutt. gen. 1. 

 p. \2\, noX oi Michx. 



Stem 1-2 feet high, branchingtabove, angular. Leaves 2-3 inches lopg and 4-6 lines 

 Tvide, tapering at the base into a petiole, not dotted ; the margin rough, but not serrulate. 

 Peduncles from the leafy summits of the branches, about an inch long. Calyx-segments 

 lanceolate, acute. Corolla pale yellow, smaller than in the preceding species, minutely 

 glandular at the base : segmerrts abruptly acuminate, crenulate. Stamens as in L. ciliata. 



Wet grassy meadows and borders of salt marshes. Fl. July - August. Nearly allied to 

 the preceding species, but I have never met with intermediate forms. It is readily distinguished 

 by its narrower leaves, which are acute at the base, and the less ciliate petioles. 



6. Lysimachia longifolia, Pursh. ^volute Loosestrife. 



Stem quadrangular, branched above ; leaves opposite, sessile, narrowly linear, revolute on 

 the margin, not dotted ; peduncles l-flowered, somewhat terminal, nodding. — Pursh, fl. 1. 

 p. 135 ; Duby in DC. prodr. 8. p. 63. L. revoluia, Nutt. gen. 1. p- 122 ; Torr. fl. 1. 

 p. 212 ; Beck, hot. p. 291 ; Hook. fl. Bor.-Am. 2. p. 122. 



.Plant smooth. Stem 12 - 18 inches high. Leaves somewhat coriaceous ; the radical ones  

 spatulate, on long petioles ; those of the stem about 3 inches long and 2 lines broad, with 

 smaller ones in the axils, giving them the appearance of being verlicillate. Peduncles mostly 

 at the summit of the stem and at the extremity of the branches, slender. Segments of the 

 calyx ovate-lanceolate, acuminate. Corolla yellow ; the lobes broadly ovate, abruptly acumi- 

 nate, undulate. Jtamens nearly equal : filaments ..... with intermediate 

 teeth: anthers linear oblong, very large. Capsule 5-valved, many-seeded. 



On calcareous rocks about the Falls of Niagara {Dr. Eddy, Mr. Cooper ^ Dr. Sartwell). 

 August. A very ornamental species. 



6. Lysimachia thyrsiflora, Linn. Tufted Loosestrife. 



Nearly smooth ; stem simple ; leaves opposite, sessile, lanceolate, dotted ; flowers in 

 axillary pediinculate capitate racemes, 5 - 7-parted. — Linn. sp. 1. p. 147 ; Michx. fl. 1. 

 p. 127 ; Engl. hot. t.lQl; Bigel. fl. Bost. p. 74. L. capitata, Pursh, fl. I. p. 135 ; Torr. 

 fl. 1_. p. 212 ; Beck, hot. p. 290. Naumbergia thyrsiflora, Duby in DC. prodr. 8. p. 60. 



Stem assurgent, 1-2 feet high, terete, sometimes a little pubescent ; the lower. and sub- 

 merged part jointed, naked or with scales instead of leaves. Leaves 3-6 inches long and 

 from half an inch to an inch or more broad, minutely dotted with black glands, slightly villous 



