H. Nuttallii.—Peplis? diandra, Nutt.! in DC. prodr. 3. 53. 77. Ptilina
aquatica, Nutt. ! mss.
1 n^slow-flowing streams and ponds, Arkansas, Nuttall! Texas, Drum-
inona! Lmcolnton, N. Carolina, Mr. Curtis! Illinois, Mr. Buckley! June-
Aug.—Stems 1-2 feet in length, very leafy, wholly immersed, or with the
summit floating. Leaves about an inch long, narrowly linear, acute; the
uppermost, when floating, rather shorter and broader, obtuse, indistinctly
veined. Flowers not larger than a pin’s head. Calyx slightly plaited
between the lobes. Stamens 2, or frequently 4, shorter than the calyx.
2. AMMANNIA. Houst. in Linn, gen.; Lam. ill. t. 77; W. Am.
prodr. Ind. Or. \ .p . 304 (excl. § 1 ^ 5 ? )
Calyx more or less campanulate, 4-6-toothed or lobed; the sinuses usually
expanding into spreading accessory teeth or horns. Petals as many as the
lobes of the calyx, or often wanting. Stamens as many or sometimes twice
as many as the lobes of the calyx. Ovary 2-4-celled: style short, or rather
long: stigma capitate. Capsule globose or ovoid, included in the calyx,
either bursting transversely or opening by valves. Seeds numerous, attached
to thick central placentas.—Herbaceous mostly glabrous annual plants,
growing in wet places, with square stems, and opposite entire leaves. .1'Iow-
ers axillary, sessile or somewhat peduncled, bracteolate : petals small.
§ Calyx 4-angled or plaited, with 4 short lobes and as many small spreading
hom-like processes: petals 4 (purplish) caducous: stamens 4 : capsule
4-celled.—Ammannia proper, Am.
1. A.latifolia (Linn.): stem erect; leaves linear-lanceolate, elongated
acute, dilated and obtusely cordate-auriculate at the base, closely sessile •
flowers 1-5 m each axil (somewhat pedunculate, at least when solitary! •
style more than half the length of the capsule— Linn. spec. 1. p. 119 • Lam.
^7’ spec. 1. p. 678 ; DC. prodr. 3. p. 78 ; Hook. Sr
in compan. to hot. mag. 1. p. 46. A. ramosior, Linn. mant. p. 332 9
Willd.! 1. c. not of Linn. spec. *
Wet places, Illinois, Mr. Buckley! St. Louis, Drummond! Louisiana,
Dr. Ingalls! Arkansas, Dr. James! Dr. Pitcher! July-Sept__Stem
6-24 inches high, branching. Leaves 2-3 inches long; the uppermost often
narrowly linear. Bracteoles mmute. We suspect this also occurs in the
southern Atlantic States.
2. A . humilis (Michx.): stem branched from the base, ascending; leaves
lmear-oblong or lanceolate, obtuse, tapering at the base into a short petiole;
flowers solitary m the axils of the leaves, closely sessile ; style very short
or almost none.—Michx. ! Jl. 1. p. 9 9 ; Ell. sk. 1. p. 218; Torr.! ft. 1 p
1QS; DC. ! l.c. A. ramosior, Linn. spec. 1. p. 120; Walt. Car. p. 88;
not of Linn. mant. Sf subsequent authors.
0. leaves mostly sessile, narrowed below, but more or less cordate-sagittate
at the base; flowers about 3 in each of the lower axils, solitary above__
A. ramosior, Michx. ! 1. c. (at least partly); Ell. 1. c .; DC.! l. c. A. nur-
purea, Lam. diet. 1. p. 131, fide DC. 1
In wet places, Connecticut! and New York! (near the coast) to Georgia1
and Louisiana! Also Oregon, on the Wahlamet, Nuttall ! 0. New Jersey!
and Southern States. Aug.-Sept.—This species in the Northern States does
not exceed 6 to 10 inches in height. \Ye have seen no Southern specimens
of our var. 0. which in New Jersey grows in company with the A. humilis
of Michaux, and the two appear to pass into each other. Linnaeus established
his A. ramosior wholly upon Clayton’s plant, which is clearly the A.
humilis, Michx.; but subsequently (in the Mantissa) he totally changed both
the character and description, and adduces the synonym of Clayton with a
mark of doubt. ’We cannot certainly determine whether the plant which
Linnseus lastly had in view, is our variety of the present species (in which
case his name, though not very applicable, should be retained), or his own A.
latifolia. The latter is far most probable; since he states the flowers to be
three in each axil, and the style to be longer than the ovary. Hence, to
avoid_ confusion, we are obliged to suppress the name A. ramosior, Linn.
—Elliott was certainly mistaken in supposing the calyx to. cohere with the
ovary. In the plant from Oregon, the lower leaves are sometimes alternate,
and the upper 3 together.
3. LYTHRUM. Linn, (partly); fuss. gen. p. 332.
Calyx cylindrical, striate; teeth short, 4-6, usually with as many minute
intermediate teeth or processes. Petals 4-6. Stamens as many or twice as
many as the petals, inserted about the middle or near the base of the calyx,
nearly equal. Style filiform stigma capitate. Capsule..oblong, 2-celled,
many-seeded, enclosed in the calyx.—Herbs, or rarely suftruticose plants,
with opposite or scattered entire leaves, and purplish or white flowers.
§ Stamens mostly equal in number with the petals: flowers solitary in the
axils of the leaves (^glabrous).—Hyssopifolia, DC. (Pythagorea, lloj'.)
1. L. Hyssopifolia (Linn.): annual; leaves opposite or alternate, linear
or oblong, obtuse ; flowers nearly sessile, shorter than the leaves ; bracteoles
minute or none; calyx obscurely striate ; petals (pale purple) and stamens
5 -6 .— Linn. ! spec. 1. p. 447 ; Jacq. ft. Austr. t. 133 ; DC. ! prodr. 3. p.
81. L. hyssopifolium, Engl. bot. t. 292 ; Bigel. f t Bost. ed. 2. p . 188.
In (salt?) marshes, Massachusetts! and New York! July.__Branches
quadrangular, very slightly margined. Leaves pale green, somewhat attenuate
or acute at the base. Flowers small.—This is by no means common
m this country, and has perhaps been introduced. A variety of L. alatum
is frequently mistaken for it.
2. L. alatum (Pursh) : perennial; stem and branches quadrangular, the
angles margined or very slightly winged ; leaves varying from oval or oblong
ovate to lanceolate, mostly acute ; the lower ones opposite, temately ver-
ticillate, or scattered; those of the virgate branches alternate ; flowers slicrhtly
pedicelled or nearly sessile, minutely bibracteolate; calyx deeply striate or
furrowed, the teeth shorter than the at length spreading subulate accessory
processes; petals (deep violet-purple) and stamens 6.
a. leaves slightly cordate at the base, closely sessile; the upper ones about
the length of the flowers.—L. alatum, Pursh! Jl. 1. p. 334 ; Nutt. gen. 1.
p. 303; Bot. mag. t. 1812 ; Ell. sk. 1. p. 545 ; DC.! prodr. 3. p. 81. L.
vulneraria, Schrank. pi. rar. hart. Monac. t. 27, fide DC. L. Kennedvanum"
H. B. &(• K. nov. gen. fide DC.
0. leaves lanceolate or elliptical, mostly opposite or whorled, acute at the
base, often a little petioled, the upper ones much crowded, often shorter than