43. 
140 
Mendoza, on the way to Villavicenzio, Dr. Gillies.—Our 
more perfect specimens are 5 or 6 inches high, the 
lower part decidedly fruticose; but we possess, also from 
Dr. Gillies, branches that are nearly a foot in length, 
` gathered from much larger plants. 
(8.) Sisymbrium canescens, Nutt.—Valparaiso, Mr. 
Cruckshanks. About Mendoza, Baths of Villavicenzio, 
western descent of the Uspallata mountains, Rio Quinto, 
province of San Luis, and Buenos Ayres, Dr. Gillies. 
Cordilleras of Chili, Cuming (N. 235.) 
44. (1.) Erysimum? pusillum, (Gill. mst.); radice descen- 
dente collo multicipi, foliis radicalibus lineari-spathulatis 
integerrimis carnosulis sparse ciliatis, scapo 1-foliato 
vel nudo glabro, pedicellis 5—6 subcorymbosis, siliqua 
lineari brevi pedicello subduplo longiore, loculis 8-sper- 
mis, stigmate globoso subsessili.—El Cerro dela Porcura 
and la Cumbre de los Andes de Chili, (12,000,) Dr. Gillies. 
This has much the habit of a Draba, but the siliquee are 
toolong, and the radicle is dorsal; the valvesare sostrongly 
carinated and concave as to render the pod tetragonal. 
MarutEwsia. (Hook. et Arn.) 
Calyx zequalis, clausus. Petala lanceolata, unguiculata, ungue 
calycem excedente, limbo siccitate torto. Stamina 
edentula. Stylus subnullus: stigma capitatum. Silicula 
sessilis, elliptica vel lanceolata, valvis planis reticulatis 
medio uninerviis. Semina plurima, immarginata: radi- 
cula dorsalis subobliqua.—Suffrutex ramosus valde folio- 
sus. Folia subfasciculata, lineari-lanceolata, pinnatifida, 
minute pubescentia subtus pallidiora, pilis stellatim ramo- 
sis. Racemi elongati. Flores majusculi, ii: ? sicci- 
tate fulvi. Siliculee magne plane. 
45. (1.) M. foliosa, (Hook. et Arn.—Tas, XCVI.)—Valpar- 
aiso, on the cliffs at Playa Ancha, Bridges; Mathews 
(N. 186.) ; Cuming (N. 642.) — Although it may be diffi- 
cult to distinguish this plant generically from Draba, yet 
