58 



PHANEROGAMIA. 



when old glabrous, except the hispid~eHutte, entire margins. Scapes 

 in our (fruiting) specimen only half an inch long (the plant of Gillies 

 is larger), 5-6-ffowered. Siliques corymbose, linear or oblong-linear, 

 nearly terete, 3 or 4 lines long, often a little curved, tipped with a 

 very short But distinct style; the valves strongly convex, one-nerved. 

 Seeds about 8 in each cell, as much biserial as in Braya alpina, as 

 figured by Hooker (Exot. Fl. t. 121). Cotyledons incumbent. 



Only a single fruiting specimen exists in the collection, which, on 

 comparison, I find to be the same as the plant of Gillies characterized 

 by Hooker and Arnott as a doubtful Erysimum: but I believe it has 

 white or purplish flowers, and that its characters more nearly accord 

 with Braya, of which it has much the habit. To this genus, now for 

 the first time identified in the southern hemisphere, I should also 

 refer the Draba imbricatifolia of Barneoud, in Gay's Flora Chilena, 

 which indeed is hardly to be distinguished from B. pusilla, except by 

 its slender style.* 



12. SISYMBRIUM, Linn. 

 1. Sisymbrium leptocarpum, Hooh. & Am. 



S. leptocarpum, Hook. & Am. Bot. Misc. 3, p. 139 j Gay, Fl. Chil. 1, p. 124. 



Hab. Obrajillo, Andes of Peru. 



Our specimen, which is in a mature fruiting state, accords pretty 

 well with the S. leptocarpum of Chili. The whole plant is smooth ; 

 the leaves not unlike those of S. officinale : but the slender, slightly 



* Braya IMBRICATIFOLIA: multiceps e caudice lignesccnte, cosspitosa; foliis brevissimis 

 rosulatis imbricatis spathulatis integerrimis Mspidissimis ; scapo glabro nudo 4-8- 

 floro; siliquis linearibus stylo gracili coronatis. 



Draba imbricatifolia, Barn, in Gay, Fl. Chil. 1, p. 158. 



Pods narrowly linear, 4 to 6 lines long, terete, acute, pointed with a style of a line in 

 length : the valves obscurely one-nerved. The dissepiment is split through the middle, 

 as in B. alpina. Seeds about 10 in each cell, nearly uniserial. Cotyledons incumbent. 



