ACONiTDM. RANUNOULACE^. 25 



ISOPYBUM. 



the lobes more or less deeply 3^7 toothed, with broad obtuse segments : 

 flowers red: sepals broadly lanceolate, abruptly acuminate, 6 lines long or 

 more, much shorter than the long stout spur. In the mountains of south- 

 ern Oregon and Ca,lifornia. 



12. ACONITUM Tourn. Inst. 424. L. Gen. n. 682. 



Tall perennial herbs with palmately lobed alternate leaves and 

 showy flowers in open racemes. Sepals 5, colored and petaloid, 

 very irregular, the upper ones arched into a hood, the lateral 

 ones plain. Petals 2-5, the upper 2 irregular, with long claw and 

 spur-like blade which are concealed in the hood of the sepals ; the 

 3 lower ones small or obsolete. Follicles 3-5, sessile, many-seeded. 



A. Columbianum Nutt. T. & G. Fl. i, 34. Rather stout, 2-6 feet high, 

 smooth below,somewhat tomentose above : leaves ample,the lower on long 

 petioles, the upper subsessile, all deeply 3-5 cleft into broadly cuneate la- 

 ciniately toothed acuminate lobes : hood 6-8 lines long with helmet-shaped 

 portion higher than broad, at length much shorter than the downwardly • 

 narrowed basal portion, very strongly beaked: follicles usually 3, oblong, 

 obtuse, 6-8 lines long, many-seeded: seeds flat, strongly keeled and trans- 

 versely wrinkled. Along mountains . steams, California to Brit. Colum- 

 bia, east to the ROcky Mountains and New Mexico. 



A. bulbiferum. Stems slender, weak and \7ney, 2-4 feet long: smooth 

 below, tomentose above: leaves rather small, on short petioles, or the up- 

 per sessile bearing bulblets in their axils, all laciniately'cut into acute 

 lobes : sepals pale blue ; hood 6-8 lines long. Fruit not seen. In marshes 

 on the eastern slope of the "Cascade Mountains near Mount Hood, flower- 

 ing in September. 



* * * Flowers regular. Carpels 1-5. Leaves ternaiely compound. 



-t-Fruit-dry. Follicles 1-20. 



13. ISOPYRUM L. Gen. n. ed. 2. 533. 



Low perennial herbs with mostly alternate 2-3-ternately de- 

 compound leaves and white flowers in lax terminal panicles or 

 solitary. Sepals 5-6, petaloid, regular, deciduous. Petals 5, 

 very small and nectariferous or none. Stamens 10-40. Follicles 

 2-20, several-ovuled. Seeds with a smooth or rugulose crustace- 

 ous testa. 



I. stipitatnm Gray Proc. Am. Acad, xii, 54. Glabrous; stems very 

 slender, 2-4 inches high from a large fascicle of thickened fibrous roots, 

 with about 2 ternate cauline leaves and a single flower ; radical leaves bi- 

 ternate, petiolate, with cuneate often 2-3 lobed leaflets, 3-5 lines long: 

 peduncle thickened at the summit ; sepals 4-6, oblong, 3 lines long : fila- 

 ments enlarged in the middle : follicles 2-6,shortly atipitate, oblong,3 lines 

 long, 3-4 seeded : seeds globular, transversely rugose. Under trees in open 

 moist places, southern Oregon, near Oakland, to northern California. 



I. Hallii Gray Proc. Am. Acad, viii, 374. Stems slender, erect, 1-3 feet 

 high, 2-leaved; leaves ample, 2-3-ternate ; leafiets obovate-cuneate 3^-2 

 inches long, irregularly 3-incised at the apex : flowers in simple or once or 

 twice forked foliaceous-bracted subumbellate corymbs : pedicels slender, an 

 inch or two long :' sepals 5, obovate, 4 lines long : filaments as long as the 

 sepals, clavate: follicles 3-5, sessile, ovate-oblong, acuminate, 2-4 seeded: 

 seeds rugulose. Along mountain streams both sides of the Willamette val- 

 ley. A rare species. 



