1 ,M > JOURNAL OF THE ARNOLD ARBORETUM (vol. t 



Sect. 2. LEPIPHERUM G. Don 



Rhododendron sect. Lepipherum G. Don, Gen. Syst. in. 845 (1834). 



Rhododendron sect. Osmothamnus Maximowicz in Mem. Acad. Sci. St. Petersb 

 ser. 7, xvi. no. 9, 14 (Rhod. As. Or.) (1870), in part. 



KEY TO THE SPECIES 



Corolla funnelform-campanulate, filaments villose at base. 

 Shoots villose, not verrucose when young; midrib pilose or villose on under 



surface of leaf. 10 H Augustxnii. 



bnoots not villose, densely verrucose when young; midrib glabrous on under 



surface of leaf II. R. yanthinum 



Corolla rotate-campanulate, filaments glabrous 12. R, micranthum. 



Rhododendron Augustinii Hemsley in Jour. Linn. Soc. xxvi. 19 

 (1899).— Vilmorin & Bois in Frut. Vilmorin. 173 (1904).— Bean in Flora & 

 Sylva, in. 162, t. (1905); Trees & Shrubs Brit. Isles, II. 343 (1914). 

 Mottet in Rev. Hort. 1909, 18, fig. 6.— Hemsley & Wilson inKewBulI.Misc 

 Inform. 1910, 114— Raffill in Gard. Chron. ser. 3, lii. 4, fig. 3 (1912). 

 Rehder & Wilson in Sargent, PI. Wilson, i. 524 (1913).— Craib in Bot. Mag. 

 cxxxix. t. 8497 (1913).— Rehder in Bailey, Stand. Cycl. Hort. v. 2938 

 (1916).— Magor in Rhod. Soc. Not. i. 24 (1916).— Millais, Rhodod. 124, fig. 

 facing p. 24 (1917).— Balfour f. in Rhod. Soc. Not. I. 148 (1917). 

 Garden, lxxxv. 68, fig. (1921). 



Bush from 1 to 6 m. tall with many twiggy branches, reddish and villose 

 when young, later glabrous with gray peeling bark; winter-buds narrow- 

 ovoid, acute, pubescent and glandular-lepidote. Leaves subcoriaceous, 

 lanceolate to oblong-lanceolate, without petiole 3-10 era. long, 1-3 cm! 

 wide, acute or subacuminate, base narrow, often abruptly so, sometimes 

 rounded or truncate, upper surface dark green more or less covered with 

 apprcssed gray hairs, lower surface gray-brown densely covered with 

 shining brown Iepidote glands, midrib pilose or villose on basal half; 

 petiole 0.5-1.5 cm. long, villose. Flower usually 3 in a terminal fascicle,' 

 rarely 6; pedicels ascending-spreading, 1-2.5 cm. long; Iepidote, pubescent 

 or glabrous; calyx minute, discoid, Iepidote with 5 small ciliolate teeth; 



occa 



sionally white, wide-funnelforra, 3-4.5 cm. long and broad, blotched on 

 posterior part with greenish yellow or yellow-brown, tube narrowed, lobes 

 spreading, rounded or sub-acute, margin undulate, usually more or less 

 lepidote-glandular without; stamens 10, unequal in length, slightly exserted, 

 filaments villose at base; pistil overtopping stamens, ovary narrow-ovoid! 



base 



curved, glabrous, stigma capitate, lobed. Fruit oblong-cylindric, 1-2 cm. 



3-0 



seed 



This is an exceedingly common species in Hupeh and is found on the 

 mountains westward far into Szechuan. It is partial to the margins 

 of woods but is happiest in open rocky situations where it is fully exposed 



