CRUCIFERJL 53 



Var. /3. STYLOSA : siliculis juxta margines parce Mrtis mox glabris stylo 

 longiusculo superatis; corymbo laxifloro, 



Hab. Above Obrajillo, Andes of Peru : probably in the alpine region 

 (var. /?.). 



The specimen agrees well with that described by Dr. Hooker, 

 which was gathered by Mr. M'Lean in the same region, except in 

 the particulars above mentioned. The stems divide from the crown 

 of the slender perennial root, are an inch or two in length : the leaves 

 crowded, but spreading, canescently tomentose, somewhat hirsute, 3 

 lines long, obovate-oblong, obtuse. Peduncle an inch or so in length, 

 naked, hirsute, bearing a small umbelliform corymb, which is scarcely 

 subcapitate, as the fhwers are few and lax, on pedicels as long as the 

 calyx. Sepals a line long, loosely hirsute, as are the pedicels, shorter 

 than the spatulate and apparently white petals. Silicles ovate, gla- 

 brous, except that the margins are beset with scattered hirsute hairs, 

 which are, however, deciduous, 2 or 3 lines long, tapering into a 

 distinct style, which is slender, and over half a line long, while in 

 Dr. Hooker's plant it is very short : the valves flat 



3. Drab a Brackenridgei, Sp. Nov. 



D. canescenti-pubescens ; caulibus abbreviatis e radice perenni divisis; 

 foliis confertis obovato-oblongis ohtusis ; pedunculis elongatis nuclis; 

 racemo densifloro ; floribus parvulis albis ; siliculis oblongis seu lanceo- 

 lato^llipticis pubescentibus stylo brevissimo super atis, valvis subplanis. 



Yar. (3. siliculis mox glabratis; caulibus nunc elongatis. 



Var. y. siliculis soepius lineari-oblongis mox subglabratis ; foliis canes- 

 centi-tomentosis. 



Hab. Banos, and above Obrajillo, Andes of Peru. 



Plant canescent with a rather hirsute stellate pubescence, or, in var. y. 

 tomentose-canescent : the short stems branching from a perennial root, 

 tufted, an inch or two in length. Leaves crowded, spreading, 3 to 6 



14 



