STANDLEY FLORA OF GLACIER PARK. 379 



Petals 1.2 to 4 cm. long; stigma with 4 long lobes. 



Petals yellow; capsule with narrowly mnged angles 4. LAVAUXIA. 



Petals wljite; capsule with 2 low crests along each angle. 



5. PACHYLOPKUS. 

 Plants with leafy stems. 



Seeds each with a tuft of silky hairs at one end; leaves opposite or alternate. 



2. EPILOBIUM. 

 Seeds glabrous; leaves alternate. 

 Petals 1.2 to 3 cm. long, white or yellow. 



Petals yellow; stems hairy 6. OENOTHERA. 



Petals white; stems glabrous or nearly so 7. ANOGE.A. 



Petals 1 to 6 mm. long, pink to purplish red, rarely white. 

 Plants perennial; petals 4 to 6 mm. long; fruit nutlike, not opening. 



8. GAURA. 

 Plants annual; petals 1 to 3 mm. long; fruit opening when ripe. 



Calyx with a short tube; capsules sessile 9. BOISDUVALIA. 



Calyx without a tube; capsules stalked 10. GAYOPHYTTJM. 



1. CIRCAEA L. Enchanter's nightshade. 



Perennials, glabrous or nearly so; leaves opposite, petioled, broadly ovate, thin; 

 flowers very small, white, in racemes; petals notched, about 1.5 mm. long; fruit 

 obovoid, covered with whitish hooked hairs. — The fruits adhere to clothing readily. 

 The roots bear cylindric watery tubers. 



Leaves sharply toothed, usually cordate at base 1. C. alpina. 



Leaves entire or with very short sinuate teeth, rounded or truncate at base. 



2. C. pacifica. 



1. Circaea alpina L. Occasional at low or middle altitudes, in moist woods. 

 Widely distributed in N. Amer., Eur., and Asia.— Stems weak, simple, 5 to 20 cm. 

 high; leaves 2 to 5 cm. long; fruit about 2 mm. long. 



2. Circaea pacifica Aschers. & Magn. Frequent, chiefly at middle altitudes, in 

 moist woods or thickets. B. C. to Calif., Colo., and Mont. — Stems 15 to 40 cm. high, 

 weak and succulent; leaves 3 to 6 cm. long, thin; fruit 2 to 3 mm. long. 



2. EPILOBIUM L. Cottonweed. 



Annual or perennial herbs; leaves alternate or opposite, entire or toothed; flowers 

 in racemes or solitary in the leaf axils; stamens 8; fruit a long slender capsule; seeds 

 with a tuft of white hairs at the upper end. 

 Petals 10 to 30 mm. long, rounded at the summit. 

 Leaves bright green on the upper surface, pale beneath; plants usually 0.5 to 1.5 



meters high; flowers in long naked racemes 1. E. angustifolium. 



Leaves glaucous; plants 10 to 40 cm. high; flowers in short leafy racemes. 



2. E. latifolium. 

 Petals 3 to 7 mm. long, notched. 



Plants annual; leaves mostly linear 3. E. adenocladon. 



Plants perennial; leaves broader than linear. 



Leaves with fine but conspicuous sharp teeth; plants 30 to 60 cm. high, lower 

 only if stunted . 



Petals about 7 mm. long 4. E. glandulosum . 



Petals 3 to 5 mm. long 5. E. adenocaulon. 



Leaves entire or with a few low blunt teeth; plants nearly always less than 30 

 cm. high. 

 Stems densely covered to the base with fine gland-tipped hairs; leaves finely 

 hairy 6. E. mirabile. 



