1886.] 299 [Trelcase. 



perfect, of medium size, erect in a few-flowered cyme. Sepals 

 white, petaloid, spatulate-obovate, soon reflexed. Stamens nu- 

 merous, scarcely exceeding the sepals, filiform below but spatulately 

 enlarged and petaloid (not clavate), above, bearing o^al, blunt 

 anthers J- mm. long. Achenia (often red-tinted) 5-10, 4 mm. 

 long, spreading on reflexed or filiform stipes of equal length ; flat- 

 tened, with the ventral suture mostly concave and the dorsal reg- 

 ularly arched ; marked with about eight low, longitudinal nerves that 

 are often forked or anastomosing. Stigma minute, rounded, ob- 

 lique on the short style. — Mountains, Virginia to Alabama. 



Hooker confounded the western T. sparsiflorum with this species, 

 his error leading to the establishment of T. filipes by Torrey and 

 Gray. T. nudicaule, Schw. is found by Dr. Gray to be only a 

 few-flowered, nearly leafless form of this species. 



2. T. alpinum, L. Sp. PI. 767. — With scaly root-stocks, the 

 leaves tufted at their summits. Stem naked or 1-leaved near the 

 base, very slender, 1-10 inches high, glabrous or sparsely glandu- 

 lar above. Leaves small, long-petioled, biternate, glabrous. Leaf- 

 lets approximated, sessile, thick and firm, dark-green above, very 

 pale and glaucous below and with prominent veins ; orbicular-cu- 

 neate, ^—J- in. long, short-lobed at the apex, with revolute margins. 

 Flowers small, perfect, nodding on slender pedicels, racemed. 

 Bracts scale-like or with a lanceolate, obovate apical lobe. Sepals 

 inconspicuous. Stamens about ten, their purplish filaments short 

 but slender ; anthers oblong, mucronate, 2 mm. long. Achenia 

 4-5, 3 mm. long, subsessile, obliquely fusiform or obovoid, sub- 

 terete with about ten longitudinal ribs. Stigma short-sagittate. 

 — Canada to Alaska, extending into the mountains of Colorado, 

 Nevada and Utah ; also found in Greenland and the mountains of 

 Europe and northern Asia. 



3. T. sparsiflorum, Turczainow in litt. in Fischer & Meyer, 

 Index Sem. Hort. Petropol. i, 40. — Stem firm, erect, leafy, 1-6 ft. 

 high, with ascending branches. Leaves ample (contracted in the 

 smaller specimens), 3-ternate, the lowest petioled. Leaflets ap- 

 proximated, short-petioled, thinnish, round or spatulate-oblong, 

 i~li in. long, slightly cordate at base ; divided above into three 

 obtuse or short-acuminate lobes that are again incised. Flowers 

 perfect, not large, erect or soon nodding on slender pedicels in a 

 short, branched, leafy panicle. Sepals obovate, whitish, soon 

 reflexed. Stamens 10-20, the short exserted filaments widened 



