In open flatwoods and ravines, rarely in swampy areas and occasionally in 

 cleared river bottoms that are subject to periodic flooding, in e. Tex., Feb.-Apr.; 

 from s.e. Va., s. to Fla., w. to Tex. and Ark. 



6. Vaccinium arkansanum Ashe. 



Large shrub, often with several stems, crown-forming or (if disturbed) sucker- 

 ing from a rather small base. 2-4 m. high; leaves deep-green, the lower surface 

 rather pale and nonglandular. pubescent, broadly elliptic, rounded to cuneate at 

 base, acute and apiculate at apex, to 8 cm. long and 4 cm. wide, the margin entire; 

 corolla cylindric-urceolate, 6-8 mm. long, greenish-white, often with pink or red 

 stripes or the whole surface suffused with pink; fruit dull-black or with a bloom, 

 7-10 mm. in diameter, of fine flavor. V. atrococcum and V. corymbosum of Texas 

 reports. 



Sandy lake or stream margins or in swamps or marshes, occasionally in bogs 

 or open flatwoods, in e. and s.e. Tex., Feb.-Apr.; from n. Fla., w. to Tex. and Ark. 



This species has excellent possibilities of being improved and commercially 

 grown for its tasty fruit on sour evergreen-shrub bog soils in southeast Texas. 

 Where found, it produces abundant deep blue fruits with a fine blueberry flavor. 



2. Rhododendron L. Rhododendron. Azalea 



Shrubs or small trees, evergreen or deciduous; buds with several to many imbri- 

 cate scales; leaves alternate, entire or rarely serrulate; flowers pedicellate, usually 

 in umbellate clusters or corymbs; calyx small, 5-parted, persistent; corolla vari- 

 ously colored from white to purple or red, sometimes yellow, funnelform to 

 tubular or rotate to campanulate, usually with a 5-lobed limb, deciduous; stamens 

 mostly twice as many as the corolla lobes and greatly exceeding them, usually 

 declined; anther cells opening by a small apical pore; style elongated and mostly 

 surpassing the stamens, the stigma capitate; capsule septicidal. usually ellipsoid- 

 conic, the seeds numerous. 



About 600 species in temperate and cold regions of the Northern Hemisphere. 



Our plants fall into the deciduous-leaved "Azalea" section of Rhododendron. 

 The genus, as a whole, is of great ornamental value. Species in the various sections 

 of the genus are easily hybridized, and numerous garden hybrids exist. 



1 . Outer surface of corolla lobes with stipitate glands extending up to or near the 

 apex; flowers appearing (or expanding) after the leaves have un- 

 folded; pedicels, calyx and capsules copiously stipitate-glandular; 

 filaments usually only slightly exceeding the corolla (2) 



1. Outer surface of corolla lobes without stipitate glands to near the apex, 



glabrous or at most puberulent or pubescent; flowers appearing 

 before or with the leaves as they unfold; filaments usually con- 

 spicuously longer than the corolla (3) 



2(1). Shrubs 4-10 dm. high, rhizomatous to form colonies 1. R. Coryi. 



2. Shrubs rarely less than 10 dm. high, not noiiceably rhizomatous or colonial 



2. R. oblongifolium. 



3(1). Pedicels, young twigs, petioles, calyx and capsules all canescent-strigose, 



rarely with a few short scattered inconspicuous glands 



3. R. canescens. 



3. Pedicels, young twigs, petioles, calyx and (to a lesser extent) the capsules all 



copiously and conspicuously glandular-stipitate 



4. R. prinophyllum. 



1. Rhododendron Coryi Shinners. 



Shrub 4-10 dm. high, with a woody rhizome, the branches more or less strigose: 

 leaves oblong-obovate to obovate-elliptic or oblanceolate, to 45 mm. long and 



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