102 SPICILEGIA GORGONEA. 
followed him confounding the two indiscriminately. Vahl 
was the first to doubt whether the R. canescens of the Syst. 
Pl., which he recognized as the R.: hezagyna of Forskàhl, was 
not distinct from the plant called by the same name m the 
two editions of the Species Plantarum. M. de Tristan 
(Mém. du Mus. 18. p. 395) pointed out the peculiar nature 
of the fruit of this species; and M. de St. Hilaire, having still 
further investigated its structure, raised it to the rank of à 
genus, without however unravelling its synonyms. 
The R. Mediterranea of Linneus, Mant., another very 
doubtful species, must, I consider, likewise merge m this. 
The specimen preserved under that name in the Linnean 
herbarium, I found, on examination, to be certainly a Cay- 
lusea, and I believe a cultivated specimen of C. canescens, 
St. Hilaire, . M. Gay, however, for whom I inspected it, 
and who has since seen it himself, thinks that it may po 
sibly be a fragment of Caylusea Abyssinica (R: Abyssinia, 
Fresen, Museum Senck. 2. p. 106) distributed by the 
Esslingen un. itin. in. the Abyssinian collection of Schimp® 
under the No. 103. 
VI. CAPPARIDEÆ. 
18. Gynandropsis triphylla, DC. Prodr. 1. 238.  Cleome 
triphylla, Linn. Sp. Pl. p. 498.—1c. Herm. Lugd. p. 965. 
Descourtilz, Fl. des Ant. t. 44. 
Has. Circa Porto Praya ins. S. Jacobi, (Hooker fil. n- 196. 
November, 1839). Planta est annua circa tropicos spat 
quie Fortunatas non attingit. 
VII. Cistingz. 
14, Helianthemum Gorgoneum, Webb; caule fruticoso, ramis 
pilis floccosis asperatis albidis, foliis latis ovatis lan- 
ceolato-ovatisque acutis pannosis subenerviis cinereo" 
pubescentibus petiolatis, stipulis lanceolato-linearibus me 
conspicuis caducissimis petiolo duplo triplove brevioribus, 
calycibus floccoso-tomentosis, foliolis latis rhomboideo- 
ovatis subacutis demum obtusissimis crassis coriace! - 
