ICOSANDRIA MONOSYNIA. 
82 T 
I. MONOGYNU . 
399. CACTUS. Gen. pi 838. 
1. C. articulato-prolifer ; articulis compressis ovatis, spinis Opuntia . 
setaeeis.— Will'd, sp. pl. 2. p. 943. 
Icon. Knorr thes. 1 . t. F. a. 
In pine-barrens and sandy fields: New Jersey to Caro- 
lina. Tj . June, July. v.v. Flowers large, yellow ; 
berries red, eatable, known by the name of Prickly 
Pears. 
There are two or three more species growing on the 
Missouri ; but having bad no opportunity to see them 
myself, I only mention it here, to draw the attention 
of the botanists in those regions towards them. 
400. BARTONIA. Sims in bot.?nag. 148?. 
1. B. germine folioso, seminibus nudis. ernatal 
B. decapetala. Sims /. c. 
On chalky soil and arid volcanic grounds, on the bor- 
ders of the Missouri. M. Lewis. $ . July, Aug. 
v. s. in Herb. Lewis. 
Radix biennis, fibrosa. Caul's ramosus, teres. Rami 
patentes, scabri. Folia alterna, semi-amplexicaulia, 
oblonga, basi dilatata, superne sensim angustiora, in- 
ciso -dentata seu subpinnatifida, utrinque scabra, glau- 
cescentia. Flores magni, albi, ex axillis superioribus, 
solitarii, pedunculaii. Pedunculi foliosi, folio breviores. 
Calyx superus campanulatus, 5-partitus j laciniis ova- 
tis, longissime acuminatis, petalis paulo brevioribus. 
Petala :0. alba, lanceolato-oblonga, acuta, unguicu- 
lata. Stamina numerosa, filiformia, petalis breviora. 
Antherce luteae, oblongae, biloculares. Germen infe- 
rum, oblongum, foliis pinnatifidis calyce brevioribus 
ornatum. Stylus staminibus longior, filiformis. Stig- 
ma simplex. Capsula cylindrica, calyce coronata, 
apice operculatim 5-valvis. Semina oblonga, plana. 
This beautiful plant, whose large white flowers open 
during the night and spread a most agreeable odour, 
was discovered in the year 1804, on the white bluft3 
near the Maha village, by the late M. Lewis, Esquire. 
In 1807 I made a drawing and description of it, for 
