Linnaan Society. 235 



tuberoso, Jibrillis numerosis ; caule simplici, credo, subjlexuoso, anyu- 

 lalo,fcre aphyllo ; floro soli/ario, terminali, 2 — ■i-bractealo ; bracteolis 

 brevibus vel sub jlore vel in caule medio, creel i; ; pefianthii tubo sub- 

 Jujalino, laciniis interioribus roseis, exterioribus Jlavis, corona luted 

 margins tturantiacd ; fructu hyalino. 



1. O. Macaiii-.nsis, caule undo, bractcolis 2 v. 3 (loreni solitaiuun termi- 



nalem sumdcientibus. 

 Hab. ad Macahe, in Prov. Rio do Janeiro. 

 Plants 2 — 3-pollicaris. 



2, O. Iguassuensis, caule subnudo medio bracteolis 3 v. 4 in verticillum 



dispositis insti'ucto. 

 Hab. ad Iguassu, in Prov. Rio de Janeiro. 

 Planta vix polliearis. 



Mr. Miers compares this Brazilian genus with Thismia, Griff, 

 (characterized at p. 195, vol. xv. of Annals), of which he has seen 

 specimens in the herharium of Sir William Hooker, as well as a speci- 

 men prohably of the same species collected by Capt. Champion in 

 the island of Ceylon. He regards Thismia and Ophiomeris as consti- 

 tuting a distinct section of the family Burmanniacecc, which he pro- 

 poses to subdivide as follows : — 



BuRMANNIACEjE. 



I. I3urmannie.£. Perianthium tripterum. Stamina 3. Ovarium 3-locularc. 



Placenta centralis. 



Capsula longitudinaliter dehiscens 1. Burtnannia, L. 



transverse fenestrata 2. Gonyanthes,Ti\\\m. 



II. Apterieje. Perianthium simplex. Stamina 3. Ovarium 1-loculare. 



PlacentoB 3, parictales. 



Capsula ivregulariter 3-valvis , 3. Dictyosfeya, Miers. 



latcraliter hians 4. Cymbocarpa, Miers. 



apice 3-valvis. Stamina appen- ) ? a ± ■ -u ., 



diculata !......) 5. ^m«,Nutt. 



■ irregulariter dehiscens. Petala ) n r , . , .,, 



nu ]j a 0, Oymnosiphon,YA\\\\\. 



III. Thismieje. Perianthium simplex. Stamina 6. Ovarium 1-locularc. 

 Placenta: 3, parietales. Pericarpium circumscissum. 



Corolla; tubus aequalis. Stamina mona- )*,„,. . „ .„, 



delpha ) 7 - rAMinia, Griff. 



gibbus. Stamina libera ... 8. Ophiomeris, Miers. 



The paper concludes with some observations on the affinities of 

 these plants, and of Triuris, Miers, and Peltophyllum, Gardn. ; and 

 was illustrated with detailed drawings of Ophiomeris Macahensis, and 

 of the flower of Thismia Brunonis, Griff., for comparison. 



May 4. — E. Forster, Esq., V.P., in the Chair. 



Read a paper " On Jansonia, a new genus of Leguminosa, from 

 Western Australia." By Richard Kippist, Libr. L.S. 



Jansonia. 



Char. Gen. Calyx ebracteatus, bilabiatus ; labio superiore fere ad basin 



bifido; infeviore 4-plo longiore, 3-partito ; segment is omnibus acutis. 



Corolla: papilionaccce petala longe stipitata ; vexitlum ovato-lanceo- 



latum, reflexum, alis oblongo-ellipticis multo brevius ; carina: com- 



