888 ERICACEAE 



12. ZENOBIA D. Don. 



Shrubs, witli glabrous or glaucous foliage. Branches terete. Leaves alternate : blades 



entire or irregularly toothed, reticulated. Flowers perfect, in axillary clusters. Calyx 



free : sepals 5, manifestly united. Corolla white or pink, campanulate : lobes 5, rounded. 



Stamens 10, included : filaments dilated at the base : anthers narrow, each sac with 2 



slender awns. Disk 10-lobed. Ovary 5-celled. Style columnar. Stigma entire. Ovules 



numerous. Capsule depressed, loculicidally 5-valved. 



Pedicels and lower surface of the leaf-blades green. 1. Z. cassinifolia. 



Pedicels and lower surface of the leaf-blades densely glaucous. 2. Z. pulverulenta. 



1. Zenobia cassinifolia (Vent.) Pollard. A branching shrub 1-2 m. tall, with 

 glabrous foliage. Leaves deciduous ; blades oblong, varying towards ovate or obovate, 

 2-6 cm. long, leathery, acute, retuse, reticulated, irregularly and shallowly serrate, nar- 

 rowed into short petioles : Hower-clusters in racemes 1-3 dm. long, the rachis zigzag : 

 pedicels 1-2 cm. long: calyx 5-6 mm. broad: sepals ovate or triangular-ovate: corolla 

 white, campanulate, 6-8 mm. long. [Andromeda speciosa Michx. ] 



In sandy soil, North Carolina to Florida. 



2. Zenobia pulverul6nta (Willd. ) Pollard. A branching shrub 1-2 m. tall, with 

 densely glaucous foliage. Leaves deciduous ; blades leathery, oblong to oval, 2-7 cm. 

 long, cuspidate or obtuse in age, entire or obscurely serrate, slightly reticulated above, 

 short-petioled : flower-clusters in elongated racemes : pedicels 1-2 cm. long : sepals tri- 

 angular, acute or short-acuminate, appressed : corolla white, campanulate, 6-7 mm. long. 

 [Andromeda pidmndenta Willd.] 



In sandy pine lands, North Carolina to Florida. 



13. PIERIS D. Don. 

 Shrubs or trees, often evergreen. Leaves alternate : blades leathery, entire or toothed, 

 often lustrous. Flowers perfect, in one-sided racemes or axillary umbel-like clusters. Calyx 

 usually subtended by several bracts : sepals essentially distinct, persistent. Corolla white, 

 urn-shaped or elongated, with 5 recurved lobes. Stamens 10, included : filaments often pu- 

 bescent, adnate to the base of the corolla-tube : anthers usually awned on the back, open- 

 ing by terminal pores. Disk 10-lobed. Ovary 5-celled. Stigma truncate. Ovules numer- 

 ous in each cavity. Capsule 5-lobed, depressed or elongated. Fetterbxjsh. 



Filaments unappendaged : anthers awned. 



Twigs strigose : racemes in terminal panicles. 1. P. floribunda. 



Twigs glabrous : racemes solitary in the axils. 2. P. phillyreifolia. 

 Filaments appendaged : anthers awnless. 



Leaves and sepals persistent : corolla 4-5 mm. thick : capsules ovoid-globose. 3. P. nitida. 



Leaves and sepals deciduous : corolla 5-6 mm. thick : capsules ovoid-pyramidal. 4. P. Mariana. 



1. Pieris floribiinda (Pursh) B. & H. A handsome shrub 3-18 dm. tall, with 

 strigose or somewhat bristly twigs and erect branches. Leaf-blades leathery oblong, elliptic 

 or oblong-lanceolate, 2-8 cm. long, acute or short-acuminate, serrulate, bristly-ciliate, 

 obtuse or subcordate at the base : petioles 3-10 mm. long, strigose : panicles rather dense, 

 5-10 cm. long : pedicels 1-3 mm. long: calyx glabrate : sepals lanceolate or ovate-lance- 

 olate, 3-4 mm. long, acute: corolla white, conic-urceolate, 4.5-6 mm. long: capsules 

 oblong-globose or ovoid-globose, 5-6 mm. long, somewhat angled, longer than the style. 

 [A ndromeda floribmida Pursh. ] 



On dry mountain slopes, Virginia to Georgia. Spring. 



2. Pieiis phillyreifolia (Hook.) DC. A branching shrub 3-6 dm. tall with glabrate 

 foliage. Leaf-blades oblong to elliptic, oval, or oblong-oblanceolate or rarely obovate, 2-7 

 cm. long, leathery, serrate near the apex, revolute, more or less lustrous above, narrowed 

 into short petioles : racemes 1-4 cm. long, solitary in the axils, 4-r2-flowered : pedicels 

 2-6 mm. long, with small subulate-lanceolate bracts : sepals lanceolate or triangular- 

 lanceolate, 4-5 mm. long, acute, lustrous : corolla ovoid, 7-8 mm. long, terete : capsules 

 ellipsoidal, 4-5 nmi. broad, ribbed, shorter than the style. [Andromeda phillyreifolia Hook.] 



In wet pine lands and swamps, Florida and adjacent Georgia. Winter and spring. 



3. Pieris nitida (Bartr. ) B. & H. An evergreen shrub 1.5-2 m. tall, with sharply 

 angled l)ranches. Leaf-blades leathery, elliptic to oval or obovate, 2-8 cm. long, abruptly 

 acuminate, revolute, narrowed into short petioles : flower-clusters axillary, often con- 

 tiguous : pedicels 3-8 mm. long, club-shaped : calyx often minutely pubescent : sepals 

 lanceolate, 4-5 mm. long, acuminate, lustrous : corolla white to red, ovoid-cylindric. 



