Part 2, 1910] BALSAMINACEAE 95 



4. Impatiens aurella Rydb. Bull. Torrey Club 28 : 34. 1901. 



Annual; stem slender, light-green, 5-6 dm. high, branched; petioles 1-3 cm. long; 

 leaf-blades ovate or oval, thin, bright-green, a little paler beneath, 2-8 cm. long, 1-4 cm. 

 wide, acute at both ends, coarsely dentate with obliquely triangular, finely mucronate teeth; 

 inflorescence 3-5 cm. long, 2-4-flowered ; bracts minute, subulate, 2 mm. long ; lateral 

 sepals ovate, abruptly acuminate, 4-5 mm. long ; posterior sepal orange, unspotted, conic, 

 10-15 mm. long, 6-7 mm. wide, gradually tapering into the abruptly recurved and S- 

 curved cylindric spur, which is about 8 mm. long ; petals orange, unspotted ; anterior 

 petal triangular-obovate, emarginate, 5 mm. long, 8 mm. wide ; the other petals resembling 

 those of the preceding species but scarcely more than half as long; pod clavate, acute, 

 15 mm. long, 4 mm. thick. 



Type locality : Priest River, Idaho. 



Distribution : Wet places, in Montana, Idaho, eastern Washington, and British Columbia. 



5. Impatieas ecalcarata Blaukinship, Mont. Agr. 

 Coll. Sci. Stud. 1 : 84. 1905. 

 Annual; stem glabrous, light-green, 9-12 dm. high ; petioles 1-3 cm. long; leaf-blades 

 ovate or ovate-elliptic, 2-10 cm. long, 1-5 cm. wide, usually acute at both ends, dentate 

 with obliquely triangular, mucronate teeth, light-green above, paler beneath ; inflorescence 

 3-5 cm. long, 2-6-flowered ; bracts linear-lanceolate, 3 mm. long; lateral sepals obliquely 

 oval, abruptly acuminate at the apex, 6 mm. long; posterior sepal orange or sometimes 

 paler yellow, unspotted, helmet-shaped, unspurred, 8-10 mm. deep, 10-13 mm. wide ; 

 petals of the same color as the sac ; anterior petal orbicular or reniform, notched ; lateral 

 petals oblanceolate or oblong, 6 mm. long, the posterior ones 12-14 mm. long, obliquely 

 spatulate, notched ; capsule clavate, acute, about 18 mm. long, 4 mm. thick. Perhaps a 

 form of the preceding species. 



Type locality : Damp shady margin of a small stream about half a mile east of Plains, Mis- 

 soula County, Montana. 



Distribution : Wet places in western Montana to southeastern British Columbia and Wash- 

 ington. 



Illustration : Mont. Agr. Coll. Sci. Stud. 1 : pi. 1,/. C, D. 



6. Impatiens Nortonii Rydberg, sp. nov. 

 Annual; stem light-green, glabrous, about 1 m. high; petioles 1-8 cm. long; leaf- 

 blades thin, light-green, slightly paler beneath, 4-10 cm. long, ovate, acute at both ends 

 and mucronate at the apex, crenate with rounded-ovate, very oblique, mucronate teeth ; 

 inflorescence 1-3-flowered; bracts linear-lanceolate, about 5 mm. long; lateral sepals ovate, 

 oblique, acuminate, 7-10 mm. long ; posterior sepal orange, spotted with brown or purple, 

 usually tinged with purple towards the end, 2.5-3 cm. long and nearly 1.5 cm. wide, grad- 

 ually contracted into the spur, which is slightly clavate, abruptly recurved ; petals spotted 

 with purple, the anterior obovate, nearly 1 cm. long, and fully as wide, the lateral ones 

 obliquely obovate, the posterior ones broadly obovate, 15-20 mm. long. 



Type collected in wet woods, Pottawatomie Countv, Kansas, 1895, J. B. Norton 58 (herb. N. 

 Y. Bot. Gard.). 



Distribution : River banks in Kansas and Missouri. 



7. Impatiens mexicana Rydberg, sp. nov. 

 Annual ; stem 4 dm. high or more, glabrous, striate, light-green or tinged with purple, 

 slender; leaves alternate ; petioles 1-3 cm. long; leaf-blades 2-5 cm. long, 1-3 cm. wide, 

 ovate, acute at both ends, dentate with obliquely triangular, mucronate teeth, thin, some- 

 what paler beneath; inflorescence 2-3 cm. long, usually 2-flowered; bracts minute, subu- 

 late; lateral sepals obliquely ovate, abruptly acuminate, 5-6 mm. long; posterior sepal 

 spotted with large purplish spots, elongate trumpet- or funnel-form, fully 2 cm. long, 

 about 8 mm. wide, gradually tapering into the reflexed spur, which is fully 1 cm. long; 

 anterior petal broadly ovate, about 5 mm. long ; lateral petals oblong, truncate, about 15 



