341 



Hadix perennis, subfusiformis, crassa, lignosa, hie illic fibris 

 ramosis instructa. Caulis erectus, simplex, spithamaeus 

 ad pedalem et ultra, teres, glaber, foliosus. Folia omnia 

 lanceolata, glabra, basi apiceque attenuata; caulina 

 sessilia, integerrima; radicalia longe petiolata, subserrata. 

 Racemus (vel spica) terminal is, elongatus, simplex, multi- 

 floras. Floi'es fere omnino sessiles, albi. Petala calyce 

 subduplo longiora, linearia, apice dilatata, venosa. An- 

 therce oblongae, siccitate curvata^. Germen lineari-ob- 

 longum, teres, sublonge pedicellatum, pedicello hirsuto. 

 Stigma fere sessile, parvum, capitatum. SiliqiicB pendulae, 

 lineari-ensiformes, duas uncias longae, duas lineas latae, 

 stipite gracili duas tres lineas longo sufFulta. ValvcB 

 planae, membranaceae, subtorulosse. Semina, singulo 

 loculo 6-8, transversim inserta, vel apice ad basin siliquae 

 versa, orbiculari-compressa, fusca, (vix matura) submar- 

 ginata, (matura) immarginata. Embryo flavus. 



It is singular that Sprengel should have placed this plant 

 in the genus Arabis, notwithstanding that its habit is widely 

 different, and that it has been so admirably defined as to 

 genus by Mr. Brown. 



Tab. LXVII. Fig. 1, Flower. Fig. 2, Petal. Fig. 3, 

 Pistil. Fig. 4, Stamen. Fig. 5, Fruit. Fig. 6, Siliqua 

 with the valves separating. Fig. 7, Seed. Fig. 8, Sec- 

 tion of do. Fig. 9, Embryo : — all but Jig. 5, magnified. 



2. Macropodium laciniatum ; foliis omnibus petiolatis lacini- 

 ato-pinnatifidis, floribus pedicellatis, petalis angustis line- 

 aribus. (Tab. LXVIII.) 



M. laciniatum. Hook. Fl. Bor. Am., v. 1. j). 43. 



Hab. In rupibus siccis apud " Wallawallah" et " Priest's 

 Rapid" fluminis " Columbia" Americas septentrionalis. D. 

 Douglas. 



Radix annua. Caulis erectus, herbaceus, teres, valde ramo- 

 sus, ut et tota planta, glaberrimus, duas ad quinque pedes 

 altus, foliosus. Folia omnia petiolata, circumscriptione 

 lanceolata, vel ovato-lanceolata, profimde pinnatifida, 



