LYTHRACE^. (LOOSESTRIFE FAMILY.) 183 



brichia Nuttallii, M. A. Curtis.) Wisconsin and Minnesota (T. J. Hale), 

 Illinois (Buckley, Vasey, Hall, &c.), and southward. When in deep water the 

 stems are l-3 long, very leafy, the flowers and pods not larger than a pin's 

 head : when terrestrial 2' - 6' long, larger-flowered { resembling depauperate 

 specimens of No. 1, with obsolete projections at the sinuses. 



2. LY THRUM, L. LOOSESTRIFE. 



Calyx cylindrical, striate, 5 - 7-toothed, with as many little processes in the 

 sinuses. Petals 5-7. Stamens as many as the petals or twice the number, in- 

 serted low down on the calyx, commonly nearly equal. Pod oblong, 2-celled. 

 Slender herbs, with opposite or scattered mostly sessile leaves, and purple 

 (rarely white) flowers ; produced in summer. (Name from \v0pov, blood; per- 

 haps from the crimson blossoms of some species.) 



* Stamens and petals 5 - 7 : flowers small, solitary and nearly sessile in the axils of 

 the mostly scattered upper leaves : proper calyx-teeth often shorter than the inter- 



1. L. Hyssopifblia, L. Low annual (6'- 10' high), pale; leaves oblong- 

 linear, obtuse, longer than the inconspicuous flowers ; petals (pale-purple) 5-6. 

 Marshes, coast of New England and New Jersey. (Eu.) 



2. L. alatum, Pursh. Tall and wand-like perennial ; branches with 

 margined angles ; leaves from oblong-ovate to lanceolate, the upper not longer than the 

 flowers; petals (deep purple) 6. Michigan, Wisconsin, and southward. 



3. L. lineare, L. Stem slender and tall (3 -4 high), bushy at the top, 

 two of the angles margined ; leaves linear, short, chiefly opposite, obtuse, or the 

 upper acute and scarcely exceeding the flowers ; calyx obscurely striate ; petals 

 (whitish) 6. Brackish marshes, New Jersey and southward. 



* * Stamens 12, twice the number of the petals, 6 longer and 6 shorter : flowers large, 

 crowded and whorled, in an interrupted wand-like spike. 



4. L. Salicaria, L. (SPIKED LOOSESTRIFE.) Leaves lanceolate, heart- 

 shaped at the base, sometimes whorled in threes. Wet meadows, Eastern New 

 England, and Orange County, New York : also cultivated. Plant more or less 

 downy, tall: flowers large, purple, trimorphous, as to respective length of style 

 and filaments in 3 different kinds of individuals. 



3 . "N E S JE A , Commerson, Juss. SWAMP LOOSESTRIFE. 



Calyx short, broadly bell-shaped or hemispherical, with 5-7 erect teeth, and 

 as many longer and spreading horn-like processes at the sinuses. Petals 5. 

 Stamens 10-14, exserted, of two lengths. Pod globose, 3-5-celled. Peren- 

 nial herbs or slightly shrubby plants, with opposite or whorled leaves, and ax- 

 illary flowers (these probably dimorphous or trimorphous). 



1. K". verticillata, H. B. K. Smooth or downy; stems recurved (2- 

 8 long), 4-6-sided ; leaves lanceolate, nearly sessile, opposite or whorled, the 

 upper with clustered flowers in their axils on short pedicels ; petals 5, wedge- 

 lanceolate, rose-purple [^ long) ; stamens 10, half of them shorter. (Decodon 

 verticillatum, Gmelin.). Swampy grounds : common eastward. July -Sept. 



