Pen Sei 
ORD. XLI. Scabride. 705 
DORSTENIA CONTRAJERVA. CONTRAYERVA. 
ah ine Re ome eines Seems 
SYNONYMA. Contrayerva. Pharm. Lond. & Edinb. Dorstenia 
sphondylii folio, dentariz radice. Plum. ic. p. 109. tab. 119. 
Jacquin coll. vol. iii. + Auctorum sequentium synonyma ad nostram 
plantam satis claré referri nequeunt. Drakena radix. Clus. Exot. 
p. 83.. J. Bauh. Hist. vol. ii. p. 740. Gerard. Emac. p. 1621. 
_ Rati Hist. p. 1339.  Contrayervya Hispanorum sive Drakena 
radix. Park. Theat. p. 421. Pro matre radicis contrayerve in 
medicina vulgo usitate, ex vivis speciminibus cl. Houstoun duas 
dorsteniee species descripsit, 1°  Dorstenia Dentarie radice, 
sphondylii folio, placenta ovali, 2° Dorstenia Dentarie radice, 
folio minus laciniato, placenta quadrangulari et undulata. ( Phil. 
Trans. vol. 37. p. 196. & 197.) Vel Dorstenia Drakena,-et D. 
Houstoni. Lin. Syst. Veg. 
Class Tetrandria. Ord. Monogynia. Lin. Gen. Plant. 158. 
Ess. Gen. Ch. 
ceptac. commune ie os eye carnosum, in os 
; semina nidulantur. | 
E% cyte 
Sp. Ch. D. scapis roditatis; fol. pinnatifdo-palmatis serratis, 
— quadrangulis. 
THE root is perennial, tapering, unequal, compact, rugose, 
externally brown, internally whitish, and furnished with numerous 
fibres: the leaves are various, of an irregular shape, lobed, serrated, 
or rather dentatéd, pointed, veined, and placed upon long radical 
footstalks, which are winged towards the leaves: the scapi, or 
flower-stems, are round, rough, simple, rise several inches in 
height, and each supports an irregular quadrangular receptacle, 
which | contains the necessary parts of fructification: the flowers on 
examination were discovered to be distinctly male and female, 
No. 51.—vo1. 4 om 
