590 



ARBORETUM ET FRUTICETUM BRITANNICUM. 



flowers, except one found in Java by Dr. Horsfield. (Dona Rli/l.) A \ 

 jilabrous evergreen shrub. Nepal, on Gossainthan. Height 3 ft. to 6 ft. 

 Introduced in 1825. Flowers pale pink, changing to white ; April. 



A beautiftil ami very distinct species, and quite as hardy in British gardens 

 as any of the American kinds. 



Rhododendron arboreum Smith. Several iiybrids between this species and 

 II. ponticum and R. catawbiense have been raised, but those only between 

 the American and the more northerly European species liave been found 

 tolerably hardy. 



R. a. venustiim D. Don (Brit. Fl.-Gard. May, 1835, 2d ser. t. 285.) is a 

 hybrid, and an exceedingly showy and interesting plant. It was raised by 

 Mr. \Vm. Smith, nurseryman, Norbiton Common, near Kingston, Surrey, 

 from seeds of R. caucasicum that had been fertilised by the pollen of R. 

 arboreum ; and appears sufficiently hardy to survive our winters with a little 

 protection. 



5 iii. Pogonanthum. 



Derivation. From pogon, a beard, and ant/ios, a flower ; throat woolly inside. 



Sect. Char. Limb of calyx short, 5-lobed. Corolla salver-shaped, with a cy- 

 lindrical tube, and a spreading limb. Stamens 5, enclosed. Ovarium 5-celled. 

 Evergreen shrubs. Leaves coriaceous. 



H. 13. R. ANTHOPO^GON D. Don. The bearded-flowered 

 Rhododendron. 



Identification. D. Don in Mera. Wern. Soc, 3. p. 409. ; Don's Mill., 3. p. 845. 



Si/nuni/ine. R. aromaticum Wall. Cat. 



Engravings. Royle lllust., t. G4. f. 2. ; and oar fig. 1115. 



Spec. Char., i^c. Branchlets downy. Leaves oval, rusty 

 beneath from lepidoted tomentum. Corollas with a woolly 

 throat. Shrub iiuich branched. Leaves ending in a 

 reflexed niucro, naked above. Flowers glomerate, sulphur- 

 coloured. Pedicels short, lepidoted, and resinous. Caly- 

 cine segments rounded at the apex, with villous margins. 

 Segments of corolla roundish, with undulated curled 

 margins. Filaments glabrous. Stigma clavate. (Don's Mil/.) 

 An upright evergreen shrub, with the habit of R. dairicum. 

 Nepal, on Gossainthan. Height 1ft. to J^ft. Intro- 

 duced in 1820. Flowers yellow; Agril and May. 



A very interesting species, from the colour of its flowers 

 and their early appearance. Plants have survived the 

 winter of 1837-8 in the Hackney Arboretum. 



iv. Lepipherum D. Don. 



Derivation. From lepis, a scale, and phero, to bear ; leaves covered witli small scales. 



Sect. Char. Limb of calyx dilated, 5-lobed. Corolla cam|)anidate or rotate- 

 Stamens 10. Ovarium 5-celled. Leaves membranous; sometimes deciduous 

 but generally persistent. Shrubs, evergreen or deciduous ; natives of Eu 

 rope, North America, and the Himalayas. 



fu 14. R. lappo'nicum YVahl. The Lapland Rhododendron. 



Identification. Wahl. Fl. Suec., p. 249. ; Don's IMill., 3. p. 845. 



Si/nont/mes. Azalea lapponica I.in. Fl. Suec. p. M., Sp. t. 214. ; A. forrugiuea Hurt. 



Engravings. ]5ot. Mug., t. 3106. ; and our fig. 1116. 



Spec. Char,, t^-c. Shrub branched, procumbent. Branches divaricate. Cc 

 roUas rotately funnel-shaped. Young branches obscurely pubescent, wartecj 

 Leaves oblong, obtuse, stiff, beset with honeycomb-like dots, yellowish anj 

 scaly beneath ; deep green above ; and pale green, and at length yellowi.sl' 

 beneath ; thickly beset with hollow dots on both surfaces, which are covere 



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