from Western Australia. 385 



in capitula 4-flora, cernua, brevissime pedunculata, ad extremitates ramorum brevium 

 axillarium sita, bracteis 4 ovatis, coriaceis, extus velutinis inclusa, pariim infra ramuli 

 apicem in mucronem brevem sericeum productum verticillatim dispositi. Calyx extus 

 longe sericeus, ebracteatus, bilabiatus ; labiis valde inaequalibus, superiore minore, fere 

 ad basin fisso, inferiore 4-pl6 longiore, profunde tripartito. Corolla papilionacea. Petala 

 omnia longe stipitata, atro-rubra. Vexillum minimum, lamina lanceolato-ovati, stipite 

 pauUo breviore, reflexa. Alse segmenta lateralia labii inferioris calycis aequantesj carina 

 \ breviores, lamina elliptica, basi cucullata, stipitem subaequante. Carinae elliptico- 

 oblongse, calycem pariim excedentis, petala basi supra auriculata, dorso cohserentia. 

 Stamina 10, persistentia, inaequalia, anteriora longiora, parum exserta. Filamenta 

 glabra, basi dilatata, oblique calycis tubo (et 3 inferiora inter se) brevissime connexa. 

 Antherae oblongae uniformes. Germen subsessile, ovatum, ventricosum, pilis longis 

 sericeis vestitum, 4-6-ovulatum, suturia non introflexis, stipitulo basi vaginula carnosa 

 cincto. Stylus filiformis, glaber, staminibus paullo longior, apice incurvus. Stigma 

 minutum, subcapitatum. Legumen haiid visum. 

 Habitat in Novae-HoUandiae ora Austro-occidentali, ad "Scott's River," ubi (anno 1842?) 

 legit beat. Gilbert {v. s.). Vidi etiam specimen, habitu debiliore, et foliis ramulisque 

 pubescentioribus, paullo diversum, a Dom. Jac. JDrummond in vicinitate Coloniae " Swan 

 River" lectum, et a Dom, C. M. Lemann, M.D. mihi benigne communicatum. 



The nearest affinity of Jansonia unquestionably is with Brachysema, with 

 which genus it agrees in its unguiculate petals, in the form and unusual 

 length of the keel, in the extreme shortness of the standard, in its elongated 

 filiform style, and in its shortly-stalked villous germen, surrounded at the base 

 by a minute fleshy ring. It is however abundantly distinguished by its capi- 

 tate inflorescence, by the remarkable inequality of its calycine segments, by the 

 much greater length of the claws of its petals, and by the paucity of its ovules, 

 which in Jansonia do not appear to exceed six in number, while in three spe- 

 cies of Brachysema which I have examined, I have never found fewer than 

 twelve. 



From its possessing many of the characters ascribed to Leptosema, I was 

 at one time disposed to regai'd my plant as a second species of that genus, 

 although evidently very different in habit from the one described by Mr. Ben- 

 tham in the 'Annalen des Wiener Museums,' from a specimen gathered by the 

 late Mr. A. Cunningham at Sims Island, on the north coast of New Holland : 

 but Mr. Heward having kindly permitted me to examine an authentic speci- 



3 E 2 



