Xlii APPENDIX. 



fruit, petals similar in form, stamens twice the number of 

 the petals, definite pendulous ovules, and four distinct styles ; 

 but it differs from Cercodea and Haloragis in the ovary being 

 cne-celled in its original structure, and in the aestivation of the 

 corolla being imbricated, not valvate. It is probable that the 

 fruit, when it shall be known, will incline the scale of compa- 

 rison in favour of Haloragece ; but in the meanwhile this brief 

 discussion sufficiently shews the near relationship that exists 

 beween Quinchamalium, Combretacese, and Haloragese, not- 

 withstanding the distance at which the former and two latter 

 are placed in the artificial divisions of the Natural System. 

 I propose to name this very curious and interesting genus 

 Loudonia^^^ as a tribute to the eminent services rendered to 

 Horticultural Botany by John Claudius Loudon, Esq. author 

 of the Arboretum Britannicum, and of many other valuable 

 works well known in every part of the civilized world. Ha- 

 loragis cordigera, Fenzl, and probably H. scoparia of the 

 same author, the former of which has two pairs of ovules 

 hanging down from the apex of a single cell in the ovary, 

 and separated, as in the plant under consideration, by a 

 pendulous cord originating between them, may possibly also 

 belong to Loudonia ; they certainly have no title to be in- 

 cluded in Haloragis. The following cut, which represents 

 Loudonia aurea in flower, will I trust be the means of pro- 

 curing it for our gardens, or at all events of securing an 

 abundant supply of dried specimens both in flower and fruit 

 for the use of Botanists. 



^19^) Loudonia (HaloragecB'*.). Calyx 4-dentatus, superus, tubo tetraptero, a 

 latere verrucoso. Petala 4, cucullata, sestivatione imbricata. Stamina 8, 

 antheris linearibus. Discus 0. Ovarium 1-loculare : ovulis 2, pendulis, 

 anatropis, filo ab apice loculi oriundo sejunctis ; styli 4 ; stigmata rotun- 

 data, discolora, lasvia. 

 Loudonia aurea. Glaberrima ; caule erecto, tereti, sesquipedali, simplici, 

 (rlauco, discolore, basi foliato, apice nunc aphyllo. Folia linearia, alterna, 

 coriacea integerrima. Panicula terminalis corymbosa. Bracteae superiores 

 petaloideiK, obovatse, floribus aureis aequales, primariae foliaceae aut defi- 

 cientes. 



