PLex.ntoti. 15. POLYGON.^. 37. Lnpathum. 273 



V. 37. LAPATHUM. Theophrastus. Dock. 



Perigoniuni 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 lohes of the perigonium not cut. 



1. Lapathum aquaticmn. 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 hydrolapathuta, Rati Syn, 140j I. 



Hydrolapathum maximum, Ger.ein. 389, L 



Hydrolapatbum majus. Park. 1225, 



Rumex aquaticus, Lin, S. P. 479. 



Rumex Britannicus, Hiids. FLAngLed. 1, 135. 



llumex Hydrolapathum, Huds, Fl. Angl. ed. 2, 151. 



Rumex paludosus, Huds. 154. 



Rumex antiscorbuticus, Salisb. Prod. 253. 



Great water-dock. 



Ditches and river-sides ; perennial ; August. 



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. CurUleaf dock. 

 Leaves lanceolate, waved, acute ; sepales ovate, all tuber- 



culate: tubercles large, ovate, gibbous. 



Lapathum folio acuto crispo, Rati Syn, 141,3. 

 Rumex crispus, Lin, S, P. 476. 



Road-sides and pastures ; perennial ; June and July. 

 Root yellowish; stem angular; raceme5 closely leafed at 

 the bottom. 



3. Lapathum conglomeratus. Balled dock. 

 Loiuer leaves heartshape, lanceolate; upper lanceolate; 



Iranches spreading ; whirls distant ; sepales linear, obtuse, 

 all tubercled. 



Rumex paludosus, Aiton Hort. Kew. 482. 

 Rumex conglomeratus. Rath Germ, 1 ,423. 

 Rumex Nemolapathum. 



VOL. II. T 



