1726 
* OPUNTIA monacántha. 
One-spined Opuntia. 
d o 
ICOSANDRIA MONOGYNIA. 
“Wt ord. CacTEX. (Introduction to the Natural System of Botany, 
p. 54. 
OPUNTIA. Tourn. Sepala numerosa, ovario adnata, foliiformia, summa 
plana, brevia, intima petaliformia, obovata, rosacea, expansa, tubo supra ovarium 
nulle. Stamina plurima, petalis breviora. Stylus cylindricus, basi constrictus. 
Stigmata plurima, erecta, crassa. Bacca ovata, apice umbilicata, tuberculosa, 
sæpè spinifera. Embryo subspiralis, teretiusculus. Cotyledones semiteretes, 
germinantes foliacex plane crasse. Plumula parva. Frutices, trunco demum 
tereti, juniore ramisq. rarissimis cylindricis, sepiis plus minus compressis, 
articulatis, articulis ovatis v. oblongis fasciculos aculeorum aut setarum ordine 
quincunciali seu spirali dispositos gerentibus. Folia sediformia, caducissima, 
Sub quoque fasciculo juniore. Flores e fasciculis aut marginibus articulo- 
ES orti, flavi, aut rubentes. Stamina tactu subirritabilia. De Cand. prodr. 
. 471 B ' 4 
O. monacantha ; articulis obovato-oblongis, aculeis solitariis subulatis validis. 
De Cand. l.c. 
actus monacanthus. Willd. enum. suppl. 
We were favoured with a fine plant of this Cactus by the 
Countess of Guildford in May last. It is said to be a native 
of the hotter parts of South America. 
~ With regard to the species, or supposed species óf this 
difficult genus, we cannot do better than quote the words of 
Professor De Candolle, who has long, carefully and skilfully 
cultivated them. 
'“ With regard to Nopals with yellow flowers, although 
they are the most common in the gardens, the study of their 
$ Said to be named from the country of the ancient Opuntians, where it grew 
These people were located upon the site of the present Tolandi, in the 
Orea, where one species is still found. 
