OP ARTS AND SCIENCES. 281 



Sept., 1887. Resembling the I. muricaia group, but the stem is 

 evidently twining. 



Ipomcea Madrensis. Glabrous ; stems from a small oblong 

 tuber, short (a span long), erect or decumbent, simple or divided at 

 base : leaves very shortly petiolate, narrowly oblong, acute or acutish, 

 narrowed at base, entire or with a single linear lobe on each side, 2 

 inches long: peduncles 1-flowered, | inch long, scabrous, bibracteate 

 in the middle and often geniculate ; sepals ovate, acute or obtuse, 

 more or less muricate, 3 or 4 lines long; corolla purple, 15 lines long, 

 funnelform with a very broad tube, apiculate at the folds : capsule 

 globose, a littie shorter than the calyx. — On pine plains at the base 

 of the Sierra Madre, Chihuahua; C. G. Pringle (n. 1338), Sept., 1887. 

 Allied to I. leptophylla. 



Breweria rotundifolia. Stems procumbent, herbaceous, sev- 

 eral from a rather thick perennial (?) root, a span long or less, thinly 

 pubescent: leaves round-ovate, 5 to 8 lines long, very obtuse or retuse, 

 very shortly petiolate, glabrous above, silky-villous beneath : pedicels 

 sessile in the axils, 1 or 2 lines long, shorter than the narrowly oblong 

 acute bracts : sepals narrowly oblong, acute, nearly 2 lines long, 

 equalling the globose capsule ; corolla pale blue, open, 5 lines broad : 

 filaments glabrous : styles distinct and divided to the base. — In damp 

 places on the pine plains at base of the Sierra Madre, Chihuahua ; 

 C. G. Pringle (n. 1341), Sept., 1887. Allied to B. ovalifolia. 



Pentstejion Pringlei. Near P. Jamesii, finely pubescent 

 throughout, glandular above, a foot high or less : leaves narrowly 

 oblong to lanceolate, obtuse or acutish, approximate, 1 to If inches 

 long, the lowest attenuate at base : peduncles mostly short, 1-2-flowered : 

 calyx herbaceous, the segments oblong to lanceolate, obtuse or acute, 

 2 or 3 lines long; corolla apparently reddish purple, an inch long, 

 ampliate above : sterile filament naked ; anthers short, not expanded, 

 ciliate. — On hills near Santa Isabel, Chihuahua; C. G. Pringle 

 (n. 1557), Aug., 1887. The anthers are those of the Speciosi group. 



Veronica (Veronicastrum) Mexicana. Stem herbaceous 

 from a perennial running rootstock, erect, branching, a foot high 

 or more, finely pubescent: leaves sessile or the lower very shortly 

 petiolate, oblong-lanceolate, acute, cuneate at base, acutely serrate, 1 to 

 lj inches long, sparingly pubescent: racemes terminal, loose, the 

 lower bracts foliaceous ; pedicels slender, 3 or 4 lines long: calyx 

 unequally 5-lobed, the lobes oblong, obtuse, 1J lines long; corolla 

 blue, rotate with a very short tube, 4-lobed, 4 lines long. — On cool 

 damp bluffs of streams in the Sierra Madre, Chihuahua; C. G. Pringle 



