254? 19. Parietaria. 9. URTICEiE. 
PL ex, mon , 
Parietaria officinalis . Common pellitory-of-the-wall. 
Leaves lanceolate, ovate, pointed, above somewhat shining; 
beneath hairy, base 1-ribbed; leaflets of the involucrum 
ovate; stem nearly erect. 
Parietaria, Raii Syn. 158 ; Ger. era. 330. 
Parietaria vulgaris. Park. 437. 
Parietaria officinalis, Lin. 1492. 
Walls and ruins; perennial; June to September. 
Stem much branched, reddish, shining; leaves oblique, 
blackish green, lateral ribs palmate, springing out above the 
base. — Leaves strewed in granaries to drive away weevils ; 
juice diuretic, contains nitre, sometimes in considerable 
quantities. 
IV. 20. CANNABIS. Dioscorides. Hemp, 
Dioicous . — Male. Perigonium 5-sepaled; stamens 5; 
fllaments short ; anthers oblong. — F em. Perigonium oblong, 
opening on the side; ovary 1; styles 2; stigmata 2 ; peri- 
carp crustaceous, 2-valved, rather globose, enclosed in the 
perigonium ; corculum curved, inverse ; cotyledons ovate, 
thick; radicle incurved, above. — Herb erect; leaves stipuled, 
digitate, the lower opposite, the upper alternate, the floral 
sometimes simple; male flowers on panicles, axillary or 
terminal ; female 2, sessile, on the top of the twigs, with 
the rudiment of a new shoot between them. 
Cannabis sativa. Cultivated hemp ; 
Cannabis sativa, Raii Syn. 138; Lin. S. P. 
Cannabis mas, etfcemina, Ger. era. 708, 1 and 2. 
Cannabis sativa mas et fcemina, Park. 597. 
Male. Female hemp. Barren hemp. Summer hemp. 
Female. Male hemp. Steel hemp. Chari hemp. Winter hemp. 
Cultivated in rich land ; annual ; male , July ; female 
August. 
Stem macerated in water, and dressed for its fibres, used 
for cordage, strong linen, and paper: seeds boiled in milk 
for coughs and the jaundice, also used to cause fowls and 
birds to lay eggs ; and pressed for its oil. 
V. 21. XANTHIUM. Dioscorides. Ditch-burr, 
Monoicous, — Male. Involucrum many-leaved, many- 
flowered ; clinanthium paleaceous ; perigonium tubular, five- 
lobed ; stamens 5; anthers approximate.— F em. Involucrum 
1 -leafed, oblong, 2-flowered, outside muricated, inside two- 
