PL ex.mon. 15. POLYGONS. 37. Lapathum. 
273 
V. 37. LAPATHUM. Theophrastus. Dock. 
Perigonium 6-parted, unequal ; outer small, reflexed ; 
inner larger, persistent, enclosing the thecidium, tuber*- 
cular at the base : stamens 6 ; styles 3; stigmata 3, many-cut; 
thecidium 3-angular; corculum lateral, peripherical ; radicle 
above. — Root fusiform, perennial; herb slightly acid ; stem 
branched; joints swollen above; leaves lanceolate; flowers 
in half whirls, panicled ; terminal or axillary ; hermaphro- 
dite or unisexual. 
a. Inner lobes of the perigonium not cut * 
1. Lapathum aquaticum. Water dock. 
Leaves acute, rather glaucous ; lower heartshape, lanceo- 
late; upper lanceolate ; sepales ovate, obsoletely tubercu- 
lated ; tubercles becoming large, oblong, lanceolate. 
Lapathum maximum aquaticum sive hydrolapathum, Raii Syn. 140, 1. 
Hydrolapathum maximum, Ger. em. 389, 1. 
Hydrolapathum majus. Park. 1225. 
Itumex aquaticus, Lin. S. P. 479. 
Rumex Britannicus, Huds. Fl.Angl.ed. 1, 135. 
Rumex Hydrolapathum, Huds. FI. Angl. ed. 2, 151» 
Rumex paludosus, Huds. 154. 
Rumex antiscorbuticus, Salisb. Prod. 25S* 
Great water-dock. 
Hitches and river-sides ; perennial ; Augiist. 
Root thick ; stem 5 feet high, upright ; whirls near to-* 
gether; sepales ovate, veined, rarely slightly toothed. — 
Root antiscorbutic, and useful in chronic diseases from ob- 
structions in the viscera ; also a good tooth-powder. 
2. Lapathum crispum. Curl-leaf dock . 
Leaves lanceolate, waved, acute ; sepales ovate, all tuber*- 
culate: tubercles large, ovate, gibbous. 
Lapathum folio acuto crispo, Raii Syn. 141,3. 
Rumex crispus, Lin. S. P. 476. 
Road-sides and pastures ; perennial ; June and July. 
Root yellowish ; stem angular ; racemes closely leafed at 
the bottom. 
3. Lapathum conglomerate. Palled dock. 
Lower leaves heartshape, lanceolate ; upper lanceolate ; 
branches spreading; whirls distant; sepales linear, obtuse, 
all tubercled. 
\ 
Rumex paludosus, Aiton Hort. Kew. 482, 
Rumex conglomerate, Roth Germ. 1,422, 
Rumex Nemolapathum. 
VOL. II. 
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