1924| WILSON. THE RHODODENDRONS OF HUPEH 103 



The color of the flowers is not attractive and this species is the least desir- 

 able of the Rhododendrons of Hupeh. 



The form with white flowers may be distinguished as: 



Rhododendron 



M 



remember seeing a plant of the species with white flowers in western Sze- 

 chuan though doubtless such do occur there. 



Mo sco 



x. no. 7, 155 (1837).— Wilson in Jour. Arnold Arb. iv. 42 (1923), where com- 

 plete references and synonymy and a full account of the species are given. 



Subgen. II. AZALEASTRUM Planch. 



Rhododendron subgen. Azaleastrum Planchon in Rev. Hort. 1854. 



43. — Maximowicz in IV 

 (Rhod. As. Or.) (1870). 



Monog 



in text (1921) 



Azaleastrum Rydbcrg in Mem. New York Bot. Gard. I. 297 (1900), as a genus. 



KEY TO THE SECTIONS 



Corolla rotate or subrotate; stamens 5; fruit sub-globose to broad ovoid. 



1. Euazaleastrum. 



Corolla funnelform to f unnelform-campanulate ; stamens 10; fruit spindle-form 



2. Chomastrum. 



Sect. 1. EUAZALEASTRUM Wils. n. sect. 



Represented by 



13. R. ovatum. 



Rhododendron ovatum Planchon in Rev. Hort. 1854, 43.— Maxi- 

 mowicz in Mem. Acad. Sci. St. Petersb. ser. 7, xvi. no. 9, 45 (Rhod. As. 

 Or.) (1870).— Hemsley in Jour. Linn. Soc. xxvi. 28 (1889).— Hemsley & 

 Wilson in Kew Bull. Misc. Inform. 1910, 120— Schneider, 111. Handb. 

 Laubholzk. ii. 509, fig. 333 k-1 (1911).— Rehder & Wilson in Sargent, 

 PI Wilson. I. 546 (1913).— Hayata, Icon. PI. Formos. in. 139 (1913). 

 Bean, Trees & Shrubs Brit. Isles, n. 371 (1914).— P. D. Williams in 

 Rhod. Soc. Not. i. 40 (1916).— Millais, Rhodod. 222, fig. facing p. 246 



(1917) 



Azalea ovata Lindley in Jour. Hort. Soc. Lond. 1. 149 (1846) .-Fortune in Jour 

 Hort. Soc. Lond. n. 126, t. 2 (1847). -Hooker in Bot. Mag. lxxxiv. t. 5064 

 (1858).— Bentham, Fl. Hongk. 201 (1861). 

 Azalea myrtifolia Champion in Bot. Mag. lxxvii. sub. t 4609 (1851). 

 Bentham in Hooker, Jour. Bot. Kew Gard. Misc. iv. 298 (1852). 



Bush from 1 to 3 m. tall with many rigid, ascending-spreading, slender 

 branches, glandular-setose when young. Leaves thinly coriaceous, 

 violet-purple when young, dark lustrous green, glabrous at maturity, 

 ovate, without petiole 2.5-5 cm. long, 1.5-2.5 cm. wide (rarely 6-7.5 cm. 

 long, 3-5 cm. wide), short acuminate, emarginate, mucronate, base rounded 

 or somewhat narrowed; midrib villose on upper surface; petiole 0.5-1 



