1831 



* BARTONIA aiirea. 



Golden-flowered Bartonia. 



Nat. ord. Loasace/E' 



BARTONIA, Piirsh. Sepala 5. Petala 5-10, nunc 5 staminibus toti- 

 dem alternantibus petaloldeis. Stamina 00. Capsula subclavata, sessilis, apice 



3-(-7 D C.) valvis. Placentce serie simplici polyspermse. Herbte, caulibus 



teretibus, ranwsis, pallidis, hispidis, frayilibits, erectis, nunquam scanden- 

 tibus. 



B. aurea ; foliis ovato-lanceolatis simpliciter pinnatifidis laciniis inferiorum grosse 

 serratis, bracteis ovatis pinnatifidis flores obvallantibus, petalls 5 obovatis 

 ciispidatis, filamentis numerosissimis omnibus filiformibus. 



Herba annua, l-'i-pedalis, erecta, ramosa, undique pilis pungentihus 

 haud pi'urientibus hisjnda ; canlibus pallide cinereo-virentibus fragilibus. 

 Folia atroviridia ; inferiora 3 p. longa, sessilia, subamplexicaulia ex ovatd 

 basi lanceolata, acuminata, pinnatifida, lobis utrinque circiter 5 gross^ ser- 

 ratis ; superiora sensim breviora, demum in bracteas abeuntia pinnatifidas 

 quoque, calyce paulh breviores eumque arete obvallantes. Flores axillares, 

 versus fastigia ramulorum. Calyx pilis incanis hispidus ; tubo ovario adnata, 

 obovato ; limbo 5-partito, patente, cequali, corolla hreviore. Petala 5, aurea, 

 lucida, sub sole tantum expayisa, ferh. unciam longa, subrotundo-obovata, 

 cuspidata, cestivatio?ie convoluta. Stamina numerosissima, calyci inserta, 

 Jilamentis omnibus filiformibus exterioribus longioribus. Ovarium \-locu- 

 lare placentis 3 parietalibus , linearibus, polyspermis ; semimaturum parie- 

 tibus IcBvigatis nitidissimis. Semina indefinita, pallide fusca, testa suhcoria- 

 ced sub microscopio minutissime tuberculata. Embryo in medio albutninis 

 parci olcoso-carnosi ; cotyledonibus plants virescentibus, radicula tereti albd. 



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 complimcut to the late Dr. B. S. Barton of Fliiladelphia. 



