384 



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UKTICACE^. 



\_Parietdr 



la. 



Leaves opposite, — Named from itro, to hum ; in allusion to it 

 stinging property. 



1. U. pilidifera L. {Roman iV".) ; leaves ovate or cordato 

 acuminate with transverse nerves, spikes in pairs, fertile ones 

 dense globular, achenes minutely granulate shining, root an^ 

 nual. — a. leaves usually coarsely toothed. E. B,tAA8,^^g 

 leaves nearly entire. U. Dodartii Z. U. integrifolia Lam. 



Under walls and among rubbish, about towns and villages in Etifr 

 land, principally near the sea, but nowhere well established. Bally! 

 lickey, south of Ireland. — ^. Copford, Essex: Upwell, Norfolk- 

 "Wisbeach, Cambridgeshire. 0. 6 — 8. — The most venomous of 

 our British nettles, XJ, Dodartii is only known as a cultivated plant 

 and therefore may be looked upon as a very suspicious native al- 

 though the above localities have been given for it. 



2. U. urens L. (small N.); leaves elliptical serrate with about 

 5 nearly parallel ribs, spikes in pairs oblong nearly simple 

 shorter than the petiole, achenes obscurely granulate opaque 

 root annual; E, B, t. 1236. ' 



Waste places and cultivated ground, frequent ©. 6 9. 



3. U. dioica L. {great N,)-^ leaves ovate acuminate or ovate 

 lanceolate serrate cordate or rounded at the base, spikes in 

 pairs mostly dioecious much branched longer than the petiole 

 root perennial. E. B, t. 1750. 



Waste places under walls and hedge-banks, frequent. if. 6- 

 — When the leaves are broad they are cordate, when narrow, rounded 

 at the base ; but transitions may be observed on the same specimen. 

 Filaments transversely wrinkled and elastic as in Parietaria. Fertile 

 perianth often with two small hracteas at the base. The root, boiled 

 ■with alum, dyes yarn yellow ; from the fibres of the stalk a kind of 

 hemp is manufactured, as with the C7. cannahina of N, America. In 

 Scotland the young tops are in spring boiled and made into soup or 

 kail by the common people, which is viewed in the light of a cooh'ng 

 medicine. 







2. Parietaria Li 



inn. Pelhtory of the Wall. 



Polygamous. Perianth 4-fid. Stam. 



cillate. 



4, wanting in some 

 now ers ; Jilaments transversely wrinkled, at first incurved, then 

 bending back with elastic force. Sft/le filiform. Stigma peni- 



Acheiie shining, enclosed by the Joe^^«?^//^. — Leaves 

 flZfenzafe. — Named fvom jjaries^ a toatl; the species frequently 

 growing on old walls. 



1. V. officinalis Jj. (common P.)', leaves oblong-ovate or ovate- 

 lanceolate attenuated at both ends 3-nerved above the base, 

 involucre of two 3 — 7.1ubed segments with an alternating' 



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