. C R U C I F E R M. 61 



laxifloro; siliquis glabris subtdato-linearibus pedicello erectiuscxdo 

 longioribus stylo brevi apicidatis, valvis subcarinato-uninermis. 



Hab. Obrajillo or Banos, Andes of Peru. 



Root perennial, thickish, somewhat lignescent ? Stems several, 3 to 

 6 inches long, ascending, rather leafy, more or less hairy, with a 2-3- 

 forlced pubescence. Leaves sparsely beset with similar hairs, or at length 

 almost glabrous, all obovate or spatulate, rather fleshy, entire, or some 

 of the upper ones obscurely 2-3-toothed, the radical ones 6 to 8 lines 

 long, and narrowed into distinct petioles of equal length ; the cauline 

 3 or 4 lines long, narrowed at the base into a short petiole, or sub- 

 sessile. Raceme short and corymbose in flower, more or less elongated 

 and loose in fruit; some of the lower flowers usually bracteate; the 

 bracts, like the upper cauline leaves, rather shorter than the fructi- 

 ferous pedicels. Flowers a line and a half long : sepals greenish : the 

 petals apparently white or purplish. Siliques glabrous, 6 or 8 lines 

 long, ascending or slightly spreading (the pedicel mostly erect, 3 or 4 

 lines long), linear-subulate, nearly terete, pointed with a short style; 

 the valves one-nerved, scarcely connate. Dissepiment one-nerved. Seeds 

 8 or 10 in each cell, in a single series. Cotyledons incumbent. 



In habit and foliage this plant has much the aspect of a Thlaspi. 

 Its pods are those of a Sisymbrium. 



5. Sisymbrium? amplexicaule, Sp. Nov. 



S.? glabellum; caule e basi suffruticosa ramoso ; ramis divergentibus ; 

 foliis ovato-oblongis sinu profunde sagittato-cordato amplexicaidibus 

 integerrimis ; floribus laxe racemosis ebracteatis ; petalis unguiculatis ; 

 siliquis immaturis patentissimis filiformibus elongatis stigmate sessili 

 super atis. 



Hab. Between Caball and Obrajillo, Andes of Peru. 



Stems from a span to a foot high, the base apparently suffruticose, 

 loosely and divergently branched; the branches slender, nearly glabrous. 

 Leaves glabrous or minutely pruinose, about half an inch long, ovate- 



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