42 NORTH AMERICAN FLORA (VorumE 29 
2. Azalea austrina Small, Fl. SE. U. S. ed. 2. 1356. 1913. 
A shrub mostly 3 m. tall or less, with irregular branches and softly pubescent and usually 
glandular twigs; leaf-blades oval, obovate, oblong, or oblong-spatulate, 2.5-9 cm. long, acute 
or abruptly gland-tipped, rather firm in age, finely pubescent, usually permanently so, ciliate, 
short-petioled; flower-clusters expanding before the leaves; pedicels glandular-pubescent; 
calyx-lobes deltoid to triangular-lanceolate, acute, glandular-ciliate; corolla yellow or orange, 
2-3 cm. long, the tube scarcely dilated up to the limb, finely glandular-pubescent, the lobes 
broad, acute or abruptly short-acuminate; anthers 2.5-3 mm. long; capsules rather slender, 
slightly narrowed upward, 2-2.5 cm. long, finely glandular-pubescent. 
‘TYPE LocaLity: Chattahoochee, Florida. 
DistRisution: Chattahoochee region, middle Florida. 
3. Azalea nudiflora L. Sp. Pl. ed. 2.214. 1762. 
Azalea periclymenoides Michx. Fl. Bor. Am. 1: 151. 1803. 
?Azalea bicolor Pursh, Fl. Am. Sept. 153. 1814. 
Rhododendron nudifiorum Torr. Fi. U. S. 424. 1824. 
?Rhododendyvon bicolor G. Don, Gen. Hist. 3: 847. 1834. 
A shrub 3 m. tall or less, with irregularly branched stems and minutely pubescent and 
more or less strigose twigs; leaf-blades oblong to obovate or oblong-obovate, 3-10 cm. long, 
thick and firm in age, acute or abruptly gland-tipped, strigose on or near the veins beneath or 
glabrous, except the margins, short-petioled; flower-clusters expanding before or with the 
leaves; pedicels strigose or hirsute-strigose; calyx-lobes ovate to half-orbicular, copiously 
ciliate; corolla pink or white, or purplish, 2.5-3.5 cm. long, the tube gradually dilated above 
the middle, pilose or strigose, and sometimes sparingly glandular, the lobes rather broad, 
abruptly pointed; anthers 2.5-3 mm. long; capsules oblong, linear-oblong, or somewhat nar- 
rowed upward, strigose or hirsute-strigose. 
TYPE LOCALITY: Virginia. 
DistrRIsuTion: Maine to Illinois, Florida, and Texas. 
ILLUSTRATIONS: Britt. & Brown, Ill. Fl. f. 2743; ed. 2. f. 3215. 
4. Azalea canescens Michx. Fl. Bor. Am. 1: 150. 1803. 
Rhododendron canescens G. Don, Gen. Hist. 3: 848. 1834. 
A shrub 4 m. tall or less, with diffuse or spreading branches and minutely soft-pubescent 
and usually also strigose twigs; leaf-blades elliptic, elliptic-oblanceolate, oblanceolate, or nar- 
towly obovate, thickish and firm at maturity, 4-10 cm. long, acute and gland-tipped or some- 
times abruptly pointed, ciliate with scattered hairs above or nearly glabrous, permanently 
tomentose-canescent beneath, short-petioled: flower-clusters expanding before the leaves or 
appearing with the earlier leaves; pedicels canescent and more or less hirsute; calyx-lobes 
deltoid to ovate, ciliate; corolla pink, rose, or rarely white, 1.5-2 cm. long, or rarely somewhat 
longer, the tube finely glandular-pubescent, abruptly dilated near the throat, the lobes acute; 
anthers 1.5-2 mm. long; capsules slender, narrowed upward, 1.5-3 cm. long, canescent and 
hirsute. 
Type Locatity: South Carolina. 
DistRIBuTion: North Carolina to Florida and Louisiana. 
5. Azalea prinophylla Small, sp. nov. 
Rhododendron canescens Porter, Bull. Torrey Club 16: 220. 1889. Not Azalea canescens Michx. 
A shrub 5 m. tall or less, with irregularly branched stems and finely loose-pubescent twigs; 
leaf-blades oval or elliptic, varying to obovate, 2-8 cm. long, thinnish and not very firm at 
maturity, acute or short-acuminate and gland-tipped, ciliate, canescent beneath or glabrate, 
especially in age, short-petioled; flower-clusters expanding before or with the leaves; pedicels 
glandular-pubescent; calyx-lobes half-orbicular to deltoid, sparingly-ciliate, obtuse; corolla 
deep-pink to whitish, 2-2.5 em. long, the tube glandular-pubescent, dilated upward, the lobes 
rather broad, abruptly pointed; anthers 2-2.5 mm. long; capsules oblong to ovoid-oblong, 1.5- 
2.5 cm. long, or smaller, glandular-pubescent. 
Type collected at Pocono Summit, Monroe County, Pennsylvania, May 22 (in flower) Sep- 
tember 4 (in fruit), 1889, T. C. Porter (herb. Columbia Univ.). . a 
DistRiputIoN: Massachusetts, Vermont, and New York to the mountains of Virginia and 
Tennessee. \ : 
ILLUSTRATIONS: Britt. & Brown, Ill. Fl. f. 2744; ed. 2. f. 3216 (as A. canescens). 
