148 



naked \'irgate racemes ; the lower, axillary and solitary. Bracts 

 foliaceous, bracteoles (when present) minute, ovate, acute. 



Leaves sessile, ovate-lanceolate, or oblong-lanceolate, acute, three 

 to five-nerved, minutely silvery strigose above, liirsutely strigose 

 beneath. Calyx segments lance-pointed, rarely somewhat obtuse, 

 three-nerved, about half the length of the corolla tube, shorter than 

 the pedicels. Salver-form corolla imbricated, throat closed by five 

 slightly emarginated scales, stamens and pistil included, the pistil 

 slightly compressed, stigma-capitately sub two-lobed. 



Nuts four, muricate. 



Flowers with a blue border, the tube pale whitish. 



The fruit and veins of the leaves often purplish. 



The specimens of 3Iertenda herewith presented Avere collected 

 near the head-waters of the Carson River by Mr. C. D. Gibbs. 



Mertensia stomatechoides, (Kellogg.) Fig. 43. 



Stem herbaceous, erect, smoothish, (or beset throughout with a 

 few callous globules, which see magnified at No. 1, Fig. 43 ;) angled 

 by the decurrent ribs and margins of the leaves. 



Leaves ovate-lanceolate, acuminate mucronate (by a callous pro- 

 longation), three-nerved, sessile, erect, sub-clasping, decurrent ; the 

 upper canline leaves lanceolate, (radical leaves unknown.) 



Lamina membranaceous, green, somewhat roughened by very 

 minute rugae ; also minutely tubercled — chiefly above — with nu- 

 merous white callous gland-like globules or prominent points beauti- 

 fully clothed with frosty radiating villi, (see No, 1, Fig. 43, as they 

 appear under the common pocket [Stanhope] lens ;) villous globules 

 fewer beneath, scarcely a few hairs rarely seen ; margins scabrously 

 serrulate, (the remote mmute marginal callosities obtuse or pappillose 

 scabrous). 



Inflorescence axillary and terhiinal in sub-corymboid racemes, 

 sub-revolute, nodding, a fcAV of the lower ones bracted at the base. 

 Pedicels nearly as long as the flowers, also studded with the white 

 stellular globules. Calyx short (about one-tliird the length of the 

 tube), segments lance-linear, acute, mucronate, short-ciliate, three 

 to five-nerved. Corolla purplish blue, tubular-funnel-form, lobes very 

 short, obtuse, spreading, each three-nerved — which together with 

 the intennediate nerve from each filament makes the tube twenty- 

 nerved ; five small purplish, emarginate, mnuitely pappillose scales 

 or folds between the stamens of the open throat. Filaments ecpial, 

 short, flat, membranaceous, one-nerved ; anthers oblong-linear, ob- 

 tuse, sub-sagittate at base, longer than the filaments. Pistil per- 

 sistent, glabrous, fihform, sub-compressed, two-nerved, much exsert ; 

 stigma minutely icapitate sub-two-lobed. Nuts triangular, erect, 

 acute with a callous apex, one to two rows of tubercles on the mar- 

 gin, wrinkled on the slightly convex back. 



