HYDRANGEA FAMILY 393 



4. P. Gordonianus Lindl. Shrub 2-4 m. high, with ascending branches 1 

 bark of the young twigs red or chestnut, at first slightly pubescent, that of the 

 second year grayish, not exfoliating; leaf-blades ovate, more or less acuminate 

 at the apex, rounded or subcordate at the base, usually coarsely dentate, more 

 or less pubescent on both sides; sepals lance-ovate, abruptly acuminate; petals 

 white,15-20 mm. long; styles usually united to near the apex; capsule 8-10 mm. 

 long, abruptly contracted below. Hills and along streams: B.C. Ida. 'Calif. 

 Submont. My-Jl. 



6. P. microphyllus A. Gray. Shrub 5-15 dm. high, with ascending branches; 

 bark of the young twigs brown, strigose, exfoliating the second year; leaf -blades 

 oblong or oblong-lanceolate, entire, leathery, 1-3 cm. long, shining and glabrous 

 or strigose above, pale and strigose beneath; sepals ovate, 5-6 mm. long, glabrous 

 or strigose without; petals white, about 15 mm. long, obovate; stamens about 40; 

 styles united; stigmas oblong, often more or less united; capsule about 8 mm. 

 long. Dry hills and among cliffs: N.M. Colo. Ariz. Submont. Je-Jl. 



6. P. occidentalis A. Nels. Shrub 5-10 dm. high, with spreading branches; 

 bark of the young twigs brown, hirsute-strigose, exfoliating the second year; 

 leaf-blades oblong or elliptic-ovate, entire, 1-2 cm. long, strigose on both sides, 

 paler beneath, less shining than in the related species; hypanthium strigose; 

 sepals ovate, usually acute; capsule 6-7 mm. long. Canons and hillsides: 

 Utah Wyo. Colo. Submont. Jl-Au. 



7. P. minutus Rydb. Shrub about 1 m. high, with divergent branches; 

 bark of the twigs brown and finely strigose, exfoliating the second year; leaf- 

 blades oblong, 8-18 mm. long, leathery, densely hirsute-strigose beneath, slightly 

 so or glabrous and shining above; hypanthium strigose or rarely glabrate; sepals 

 about 5 mm. long, ovate; petals obovate, 10-12 mm. long. P. nitidus A. Nels. 

 Canons: Colo. Utah. Son. Submont. Je. 



2. EDWINIA Heller. 



Shrubs, with erect terete branches; bark exfoliating. Leaves opposite, toothed, 

 pubescent at least beneath. Flowers perfect, cymose, rather large. Hypanthium 

 turbinate, becoming hemispheric. Sepals 5. Petals 5, convolute, with a claw- 

 like base, white, pubescent within. Stamens 10; filaments narrow, subulate; 

 anther didymous. Ovary conic, partially 3-5-celled; styles 3-5, distinct; stigmas 

 terminal. Ovules numerous. Capsule half-inferior, with a rounded base, 3-5- 

 valved; beaks slender. [Jamesia T. & G., not Raf.] 



Sepals slightly longer than the hypanthium at maturity. 1. E. americana. 



Sepals several times longer than the hypanthium at maturity. 2. E. macrocalyx. 



1. E. americana (T. & G.) Heller. Shrub 0.5-2 m. high; bark of young 

 twigs brown, pubescent; leaf -blades oval or suborbicular, 1.5-6 cm. long, serrate, 

 finely pale- or white-tomentose beneath; hypanthium during anthesis turbinate, 

 becoming 2-3 mm. long; sepals acute, becoming 2-3 mm. long; petals cuneate; 

 body of capsule 4-4.5 mm. long, rounded at the base. Jamesia americana T. & G. 

 Cliffs: N.M. Wyo. Utah. Submont. Mont. My-Jl. 



2. E. macrocalyx Small. Shrub less than 1.5 m. high; young twigs finely 

 pubescent, pale red; leaf -blades oval or ovate, 1-2.5 cm. long, serrate, pale- 

 strigpse beneath; hypanthium flattish in anthesis, becoming 3-3.5 mm. long and 

 turbinate-campanulate in fruit; sepals acute, becoming 5-6 mm. long; petals 

 white, obovate; body of capsule 4-5 mm. long, narrowly turbinate at the base. 

 Cliffs: Utah. Mont.Subalp. Au. 



3. FENDLERELLA Heller. 



Shrubs low and depressed, with somewhat shreddy bark. Leaves opposite, 

 entire, nearly sessile. Flowers perfect, small, in compound cymes. Hypanthium 

 turbinate-campanulate, becoming turbinate. Sepals and petals 5, the latter 

 white, narrowed into broad claws, entire. Stamens 10, alternately longer and 

 shorter; filaments subulate; anthers didymous. Ovary conic, 3-celled; styles 3, 

 distinct; stigmas slightly introrse. Ovules several in each cavity. Capsule 



