- ACONITUM. RANUNCULACES. ; 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 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. tems slender, weak and yiney, 2-4 feet long: smooth 
below, tomentose above: leaves rather small, on short petioles, or the up- 
per sessile bearing bulbletsin 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. 
+ ruit 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 anda 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 14-2 
inches long, irregularly 3-incised at the apex: flowers in simple or ounce 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. 
