OF ARTS AND SCIENCES. 267 



nate ; petals yellowish-white, an inch long, denticulate, slightly ciliate 

 near the base, covered within with short crisped hairs, those above 

 the gland denser and brown-purple ; gland transversely oblong, densely 

 covered with short yellow hairs : anthers oblong-lanceolate, acute and 

 apiculate, 3 lines long : capsule elliptical, acute, 9 lines long. — 

 Found near Waldo, Oregon, in 1884, and at Roseburg in 1887, by 

 Thomas Howell. 



Juncus Oreganus. Near J. supiniformis : stems numerous from 

 very slender matted rootstocks, low (a span high or much less), very 

 slender, exceeding the very narrow leaves, simply paniculate : heads 

 few-flowered, often proliferous : sepals nearly equal, lanceolate, acute, 

 twice longer than the six stamens ; filaments about equalling the 

 anthers : capsule dark brown, acutish, mucronate, at length nearly 

 twice longer than the sepals (2^ lines long); seeds rather turgid, about 

 20-costate, with transverse lines between the costae. — In bogs at 

 Ilwasco, southern Oregon (L. F. Henderson, 1886). Differing from 

 J. supiniformis in its comparatively shorter leaves, proliferous habit, 

 hexandrous flowers, often larger capsules, and more turgid and more 

 strongly marked seeds, which in J. supiniformis are narrowly oblong, 

 and faintly 12-15-striate without cross-markings. 



2. Some New Species of Mexican plants, chiefly of Mr. C. 6r. 

 Pringles collection in the mountains of Chihuahua, in 1887. 



Thalictrum grandifoltum. Tall and glabrous or " sometimes 

 pubescent : " leaves ample, 3-4-ternate, petiolate, with dilated stip- 

 ules ; leaflets very large (1 to 2| inches long), somewhat obliquely 

 rounded, often cordate (or the uppermost cuneate) at base, obtusely 

 lobed, the prominent veins beneath with scattered short stout curved 

 hairs : inflorescence dioecious, open and spreading, somewhat leafy- 

 bracteate ; pedicels elongated, nodding at the summit : carpels 2 A lines 

 long, semicircular, beaked by the short stout base of the very long (3 

 or 4 lines) filiform style, compressed, faintly and irregularly nerved : 

 seed filling the cavity, flattened-subovate. — Collected by Mr. Pringle 

 (n. 1513) under cliffs of the Sierra Madre, Chihuahua, Oct., 1887. 



Thalictrum pixnatum. Glabrous and glaucous, slender, scarcely 

 2 feet hish, from a fascicled tubero-fibrous root : leaves lanceolate in 

 outline, 2^ inches long or less, very shortly petiolate and estipulate, 

 pinnate with about 7 (or fewer) pairs of divisions, the lower divisions 

 ternate with small lobed leaflets, the upper reduced to a single 3-lobed 



