! 
260 Lil. LYTHRACER. Lyra. 
1 AMMANNIA. 
Named in honor of John Ammann, native of Siberia, prof. of bot. St. Petersburg. 
Calyx campanulate, 4—5-toothed or lobed, generally with as many 
horn-like processes alternating with the lobes; petals 4 or 5, often 0; 
stamens as many, rarely twice as many as the calyx lobes; capsule 
2—4-celled, many-seéded—® Jn web places. Sts. square and lvs. oppo- 
site, entire. Fils. axillary. 
1. A. Humitis. Michx. (A. ramosior. ssi Low Ammannia. 
St. branched from the base, ascending; lws. linear-oblong or lanceolate, 
obtuse, tapering at base into a short petiole; fis. solitary, closely sessile, all the 
parts in 4s; sty. very short.—An obscure and humble plant in wet places, Ct. to 
Ga. W. to Oregon. Stems square, procumbent at base, 6—10’ high. Flowers 
minute, one in the axil of each leaf, with 4 purplish, caducous petals. Cal 
with 4 short, horn-like processes, alternating with the 4 short lobes of the limb. 
Aug. Sept. 
a T & G. <A. ramosior. Michz.)—Lws. subsessile, cordate-sagittate at base ; 
jis. about 3 in each of the lower axils, solitary above.—In N. J., where, itis said 
by T. & G., to grow with and pass into the other variety. - 
2. A. LaTIFOLIA. (A. ramosior. aes, 
St. erect, branching; Jvs. linear-lanceolate, dilated and auriculated at the 
sessile base; fls. crowded and apparently verticillate, upper subsolitary and 
pedunculate; cal. 4-angled, 4-horned; sep., pet., sta. and cells of capsule 4.—Wet 
prairies, Western States. Stem 1—2f high. Leaves 2—3’ by2—5". Flowers 
purple. Jl.—Sept. 
2, LYTHRUM. 
Gr. dvSpov, black blood ; referring to the color of the flower. 
Calyx cylindrical, striate, limb 4—6-toothed, with as many inter- 
mediate, minute processes ; petals 4—6, equal; stamens as many, or 
twice as many as the petals, inserted into the calyx; style filiform 
capsule 2-celled, many-seeded.— Mostly 4, with entire leaves. 
1. L. Hyssopirouia. (L. hyssopifolium. Bw. and 1st edit.) Grass-poly. 
Glabrous, erect, branching; /vs. alternate or opposite, linear or oblong- 
lanceolate, obtuse; fis. solitary, axillary, subsessile ; pet. and sta. 5 or 6.—@ A 
slender, weed-like plant, found in low grounds, dried beds of ponds, &c., Mass. 
and N. Y., near the coast, rare. Plant 6—10’ high, with spreading, square 
branches. Leaves sessile, acute at base, pale green, each with a single small 
flower sessile in its axil. Petals pale purple. Calyx obscurely striate, with 
short lobes. Jl. 
2. L. aratum. Ph. Wing-stem Laythrum. 
Glabrous, erect, branched; st. winged below; dvs. lance-ovate, sessile, 
broadest at base, alternate and opposite; fs. axillary, solitary—Damp grounds, 
Southern and Western States, common! Stem 1—2f high, striate, the wings 
narrow. Leaves 1—2’ long, }as wide. Calyx tube 12-striate, 12-toothed, alter- 
nate teeth cornute. Corolla purple, wavy, 6-petaled. Stamens 6, included. Jn. Jl. 
3. L. urnedreE. Linear-leaved Lythrum. 
St. slender, somewhat 4-angled, branched above; lvs. linear, mostly oppo- 
site and obtuse; fls. nearly sessile; pet. and sta. 6—Swamps, near the coast, 
N.J. to Flor. Stem 2—4f high, the angle sometimes slightly winged. Leaves 
1—2’ by 2—4”, rather fleshy. Flowers small, nearly white. . 
4. L. Sauicaria. Loose-strife. 
More or less pubescent; Jvs. lanceolate, cordate at base; fls. nearly ses- 
sile, in a long, somewhat verticillate, interrupted spike; pet. 6 or 7; sta. twice 
as many as the petals.—2| An ornamental plant, native in wet meadows, Can. 
and N. Eng.,rare. Stem 2—5f high, branching. Leaves 3—6’ long, }as wide, 
gradually acuminate, entire, on a short petiole, opposite, or in verticils of 3, 
upper ones reduced to sessile bracts, Flowers large, numerous and showy. 
Petals purple. Jl. Aug. ¢ 
