434 URTICACEAE 
ee stalked and elongate, becoming as long as the 
r nearly so: plants mostly dioecious. 3. P. serpyllifolia. 
1. P. herniarioides (Sw.) Lindl. Stem and Toa filiform, prostrate or 
decumbent, 3-10 em. long: leaf-blades 2—4 lon ng, obtuse at the apex, 
very thin at least when dry, transversely 
rink 
maller iri yd Pip ng: 
achene oben ovoid, 0.4 
Hammocks, S pen. Fla. ud Florida Keys — 
(W. I.) 
2. P. microphylla (L.) Liebm. Stem and 
branches spreading or creeping, 2-15 em. 
ng: leaves; and flower-clusters not 
crowded; blades 2-6 mm. long, acute or 
acutish: "smaller Wii mostly d (ied 
0.6 mm. long.— 
ish or pink: ach 0.5—0.6 
Pinelands and Jona pen. Fla. a the 
Keys.—(W. I., Mez., C. A., S. A.) 
3 P. serpyllifolia (Poir) Wedd. Stem 
and branches erect, becoming diffuse, 3 dm. long or cies thick and succulent: 
leaves, and flower- clusters, pers blades pudiqis to elliptic-obovate or 
when dr 
cuneate, 3-8 mm dee Rs , thick a firm ry: smaller icd 
.ovate, greenish: hene ahs e 0.5 lon mmus. PLANT pm —Pin 
lands and waste- ies pen. Fla. mne "res p of Mex.—(W. i, 
Mex., C. A., S. A.) 
5. PARIETARIA [Tourn] L. Annual or perennial imsy succulent 
herbs. Leaves alternate: blades entire. Flowers polygamous, in clustered 
involuerate axillary cymes, the involueres of 2—6 mo i Or es united bracts. 
Stigma tufted.—About 7 species, widely distributed.— 
Plant annual, with fibrous roots : stem and branches finely or minutely pubescent. 
Leaf- E ades ER longer raon wide, mostly 1-6 cm. 
ac 
over 1 mm. long. 
ene ladas of an ovate or elliptic type, relatively 
long-petiol 1. P. floridana. 
Leaf-blades of a lanceolate type, relatively short- 
p 2. P. pennsylvanica. 
iu cis mostly a S wide as long or wider, mostly 0.5 
achene “leas than 1 mm, wide. 3. P. nummularia. 
eunt t perennial, with Es ng woody roots, and with somewhat 
and bran ccs coarsely Te scene 4. P. officinalis. 
floridana Nutt. Stems 1-5 dm oe usually iei often mueh 
Bode 2 blades bos to subrhombie 0.5-5 cm. long: sepals acute: 
achene ovoid, —Ham and 
ei shaded i Coastal Plain, EN to 
Tex. and N. C.—(W. I.) 
2. derbi Muhl. Stems 1—4 dm 
sepals and ns.  Pistillate spikes 
leaf- blades lanceolate is ae or some- 
times broader, 1-6 cm. long, a or acumi- 
nate at the base: sepals acute: puo oval, 
den lmm.long.—(HAMMERWORT. PELLI- 
Y.) —Dry, often Re Tanke, or woods, 
uns provinees, Fla. to Tex., Minn., Ont., 
and Me. 
nummularia Small Stem usually 
NN at base, the branches becoming 
assurgent or prostrate, mostly 1-3 dm. long: 
