OP ARTS AND SCIENCES. 141 



2. Descriptions of New Species of Plants^ from Northern 

 Mexico, collected chiefly by Mr. C. G. Pringle, in 1888 and 1889. 



Thalictkum Pringlei. About two feet high, glabrous through- 

 out, dioecious or subpolygamous : leaves once or twice ternate, peti- 

 olate ; leaflets suborbicular, peltate, mostly large {}, to 2 iuches in 

 diameter), coarsely o-9-toothed, not at all glandular: flowers in an 

 open panicle, on slender pedicels, mostly nodding : anthers linear, 

 long-apiculate : fruit compressed, nearly semicircular, strongly 3- 

 nerved on the sides, 2 to 2^ lines long, the elongated filiform stigma 

 subpersistent : seed oblong, compressed, somewhat curved, shorter 

 than the cell. — Slopes of the barranca near Guadalajara, Jalisco ; 

 June, 1889 (n. 2478). 



Delphiniusi Madrense. Stem slender, from a thickened root, 

 simple or branched, 2 feet high or less, pubescent with reflexed hairs 

 below, glandular-hispid above : leaves 3-parted, the lobes subpin- 

 nately 5-7-cleft into linear-oblong segments, the lowermost less cleft, 

 the upper reduced : flowers few, pale blue, in a slender raceme, 

 rather small, with a narrow straight spur ; lateral petals long-villous : 

 carpels short, glandular-hispid. — In the Sierra Madre, near Mon- 

 terey ; May, 1889 (n. 3014). Resembling D. pauciflorum, and char- 

 acterized by its slender habit, glandular-hispid pubescence, straight 

 slender spurs, and long-villous petals. 



BoccoNiA LATiSEPALA. Herbaceous annual, the stems many in 

 a clump, 5 or 6 feet high ; young branches and panicle glabrous : 

 leaves broadly oblong, glaucous and nearly glabrous above, whitish- 

 tomentose beneath, pinnately lobed to the middle, the sinuses rounded 

 at base, the broad lobes obtuse or barely acutish, rather obscurely 

 repand-dentate : sepals very broadly elliptical or nearly orbicular, 

 3 or 4 lines long, mostly longer than the rather stout pedicels : 

 stamens 15: fruit nearly as in B. frutescens, 4 lines long, acutish at 

 both ends, about as long as the stout stipe ; style much shorter than 

 the stigmas. — Collected in flower by Dr. E. Palmer at Gunjuco, 

 Nuevo Leon (n. 23 of 1880, B. frutescens, Watson in Proc. Amer. 

 Acad. 17. 319, not of Linn.), and in fruit by C. G. Pringle (n. 1907 

 of 1888) on rich shaded slopes about the base and foothills of the 

 Sierra Madre, south of IMonterey. 



BoccoNiA ARBOREA. A tree 15 to 25 feet high and sometimes 

 2 feet in diameter, with deeply cracked corky bark ; young branches 

 and base of the slender panicle tomentose : leaves glabrous above, 

 rusty-tomentose beneath, especially on the midvein and nerves, ovate 



