52 KEY TO THE SPECIES 



XLIII. ELEAGNACEiE (Oleaster Family) 



Shrubs or small trees ; the entire leaves and the twigs sil- 

 very or brownish, with scales or stellate hairs ; flowers small, 

 clustered in the axils, perfect or dicecious ; the base of the peri- 

 a7ith inclosing a 1-celled ovary ; stamens 4 or 8 ; fruit drupe- 

 like. 



1. LEPARGYREA (Buffalo Berry) 



Flowers dicecious; the staminate 4-parted, with spreading lobes and 8 stamens; 

 the pistillate with a short terete perianth with 4 erect lobes ; the drupe-like fruit 

 (berry) with a smooth flattened seed. 



1. Lepargyrea argentea (Nutt.) Greene (Buffalo Berry. Bull Berry). A 

 rather thorny shrub or small tree, with entire, silvery, oblong, obtuse leaves ; the 

 edible berry in small nearly sessile clusters, decidedly acid and ovoid in shape. 

 Often forming dense copses on stream banks. 



2. lepargyrea Canadensis (L.) Greene (Canadian Buffalo Berry). A 

 small thornless shrub with ovate leaves, which are green and sparingly stellate- 

 scurfy above, as are also the twigs, silvery-scurfy beneath ; flowers yellowish ; 

 fruit ovoid, yellowish-red, decidedly bitter ; inedible. Frequent on wooded slopes. 



XLIV. ONAGRACEiE (Evening Peimeose Family) 



Herbs with 4-parted regular flowers, tubular calyx, 8 sta- 

 mens, a single style, and an inferior 3-4-celled ovary becoming 

 a capsule or indehiscent nut. 



* Fruit an elongated capsule opening by valves ; seeds comose. 



1. Chamsenerion. Calyx-tube not prolonged beyond the ovary. 



2. Epilobium. Calyx-tube prolonged beyond the ovary. 



* * Fruit a capsule opening by valves ; seeds not comose. 

 +■ Stamens equal in length ; flowers yellow. 



3. Onagra. Stigma cleft into 4 linear segments ; buds erect. 



4. Galpinsia. Stigma disk-shaped ; calyx-tube much longer than the ovary. 



5. Meriolix. Stigma disk-shaped ; calyx-tube much shorter than the ovary. 



6. Chylisma. Stigma capitate ; capsule pedicelled, linear-clavate, 



■*- ■*- Stamens equal in length ; flowers white, changing to rose or pink. 



7. Anogra. Stigma cleft into 4 linear segments ; buds drooping. 

 -K ■»- -(- Stamens unequal in length ; ovules and seeds few. 



8. Pachylophus. Flowers white, fading pink ; capsule obtusely 4-angled. 



9. I/avauxia. Flowers white or yellow, fading purple ; capsule sharply 

 4-angled. 



* * * Fruit indehiscent, nut-like, few-seeded. 



10. Gaura. Petals clawed, unequal ; stigma 4-lobed, fruit terete, narrowed 

 and 4-sided above. 



