ACONITUM. RANUNCULACE.E. 25 



ISOPYRUM. 



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 California. 



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



Tall perennial herbs with palmately lobed alternate leaves and 

 showy tlow r ers 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. Eather stout, 2-6 feet high, 

 smooth below, some what 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. bulbit'erum. Stems slender, weak and viney, 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 ternately compound. 



-^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. stipitatum 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 stipitate, 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; leaflets obovate-cuneate %-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. 



