1831 
* BARTONIA aurea. 
Golden-flowered Bartonia. 
Nat. ord. LoAsacea' 
BARTONIA, Pursh. -Sepala 5. Petala 5-10, nunc 5 staminibus toti- 
dem alternantibus petaloideis. Stamina 00. Capsula subclavata, sessilis, apice 
3-(-7 D C.) valvis. Placenta serie simplici polyspermee.——Herbe, caulibus 
teretibus, ramosis, pallidis, hispidis, fragilibus, erectis, nunquam scanden- 
tibus. ; 
B. aurea ; foliis ovato-lanceolatis simpliciter pinnatifidis laciniis inferiorum grosse 
serratis, bracteis ovatis pinnatidiis flores obvallantibus, petalis 5 obovatis 
cuspidatis, filamentis numerosissimis omnibus filiformibus. 
Herba annua, 2-3-pedalis, eretta, ramosa, undique pilis pungentibus 
haud prurientibus hispida; caulibus pallide cinereo-virentibus fragilibus. 
Folia atroviridia ; inferiora 3 p. longa, sessilia, subamplezicaulia ex ovatá 
basi lanceolata, acuminata, pinnatifida, lobis utrinque circiter 5 grosse ser- 
ratis ; superiora sensim breviora, demum in bracteas abeuntia pinnatifidas 
quoque, calyce paulo breviores eumque arcte obvallantes. Flores axillares, 
versus fastigia ramulorum. Calyx pilis incanis hispidus ; tubo ovario adnato, 
obovato ; limbo 5-partito, patente, equali, corollá breviore. Petala 5, aurea, 
lucida, sub sole tantum expansa, ferê unciam longa, subrotundo-obovata, 
cuspidata, estivatione convoluta. Stamina numerosissima, calyci inserta, 
filamentis omnibus filiformibus exterioribus longioribus. Ovarium 1-locu- 
lare placentis 3 parietalibus, linearibus, polyspermis ; semimaturum parie- 
tibus levigatis nitidissimis. Semina indefinita, pallidê fusca, testà subcoria- 
ced sub microscopio. minutissime tuberculata, Embryo in medio albuminis 
parci oleoso-carnosi ; cotyledonibus planis virescentibus, radiculà tereti albi. 
fe, A 
A very beautiful-half-hardy annual, discovered by Mr. 
Douglas in California, and raised in the garden of the Hor- 
ticultural Society, where it flowered in July last. 
It is only beneath bright sunshine that its splendid flowers 
unfold ; in the early morning the plant is a shabby bush, 
with pale greenish-grey branches and weedy leaves; but as 
the sun exercises his influence the petals gradually unrol as 
* Named in compliment to the late Dr. B. S. Barton of Philadelphia, 
