172 CONTRIBUTIONS TO 



tube : the leaves are 1 inch to 14, or even 20 lines long, 



1^-2 lines broad, the internodes being 5 to 1) lines distant; 



the peduncle is 3 lines, the calyx 7 lines long, obsoletely 10- 



ribbed, the segments are 5 lines in length, the space between 



the ribs not being white and membranaceous as in the former 



species : the tube of the corolla is extremely slender, li-2in. 



long, the border measuring 10 lines in diameter.* 



12. Nierembergia rigida (n. sp.) Trav. Chile. 2.532; — glaber- 



rima, caulibus ramosis erectis, valde flexuosis, filiformibus, 



striatulis : foliis angustissime linearibus, 3-costatis, mucro- 



nato-aristatis : pedunculis solitariis, brevibus, oppositifoliis, 



calyce 10-costato, laciniis linearibus, rigidis, aristatis, tubo 



3-plo longioribus ; corollee tubo gracili, pubescenti, limbo 



late campanulato, lobis rotundatis. — In Prov. Argentinis et 



Andibus Mendosinis : Rio Negro (Patagonica), Tweedie, 



v. v. et s. in herb. Hook. 



I found this very distinct species at Punta de Agua and 

 Achiras, in the Province of Cordova, about 550 miles from 

 Buenos Ayres : it was met with in the Pampas by T)r. 

 Gillies, who also collected it in the Cordillera of Mendoza. 

 The stems, which arise from a long slender ligneous root, 

 are from 6 to 8 inches high, very filiform, extremely flexuose, 

 with internodes 3 lines distant: the very rigid leaves are 15 lines 

 long, not more than one sixth of a line broad, and somewhat 

 falcate and spreading : the peduncle is 3 lines in length ; the 

 calyx, 6 or 7 lines long, is furnished with very short and 

 almost glandular white pubescence, the tube being only 2 

 lines, has 10 very prominent ribs, and 5 rigid linear segments, 

 nearly a line broad, tapering gradually to a sharp point, each 

 3-nerved : the tube of the corolla is 9 lines long, with a 

 white campanular border, nearly an inch in diameter, having 

 5 oblong rounded lobes, with purple longitudinal lines ; the 

 stamens, fixed in the mouth of the tube, are slightly p u " 

 bescent.f 



* A figure of this species is given in Plate 19 of the " Illustrations of 

 South American Plants." 

 f This species is represented in Plate 19 of the " Illustrations of South 

 rnerican Plants." 



