102 JOURNAL OF THE ARNOLD ARBORETl M [vol. vi 



10-20, crowded in umbellate corymb; rhachis 1-2 cm. long; pedicels 

 1.5-3 cm. long, short-stipitate-glandular and with rufous pubescence; 

 calyx minute, saucer-shape, with 5 irregular small triangular or rounded 

 teeth, glandular, ciliolate; corolla broad-campanulate, 5-lobed, 3-4 cm. 

 long and broad, lobes rounded, emarginate; stamens 10, shorter than 

 corolla, filaments flattened and villose at base; pistil as long as corolla; 

 ovary ovoid, 0.5 cm. long, furrowed, clothed with rufous glandular pubes- 

 cence, style glabrous, stigma capitate, lobed. Fruit on elongated, erect 

 or ascending pedicels, short-cylindric, 1-1.5 cm. long, 0.5 cm. broad, 

 furrowed, glandular, crowned by remains of style; seed shining pale 



brown, ovoid, almost wingless. 



Habitat: Formosa, higher mountains of the central range. 



On the higher peaks of the central range this species grows gregariously 

 and covers large areas in impenetrable thickets. At most it does not 

 exceed 10 ft. in height, and is commonly from 3 5 ft. tall, with gnarled. 



twisted, lichen-clad stems. On the summit of Mt. Morrison where it 

 grows associated with dwarf alpine Willows and Junipers it is less than 

 a foot high. It prefers open, rocky wind-swept situations and these it 

 struggles hard to dominate. 



I did not see it in bloom but gathered seeds and ripe fruiting material 

 in late October, 1918. For my description of the flowers I am indebted 



to a specimen collected on Mt. Taihasen by T. Ito in 1015. It is a well- 

 marked species most closely related to II. Wasonli llemsl. & Wils., 

 native of extreme western Szechuan. It also has marked affinity with 



ft. Przewalskii Maxim, the most alpine member of the section Leiorhodion 



known from western Szechuan. In all three species the rufous Boccose 



tomentum on shoots and leaves varies greatly in quantity and in persist- 



ncy. 



In my mind Rhododendron pseudochrysanthum Hayata will always be 

 associated witli my struggle across the central range to the summit of 

 Mt. Morrison. After having been storm-bound under some over-hanging 



rocks at 11,000 ft. above sea-level for sixty hours we essayed the ascent of 

 the peak and in a bitterly cold storm of wind and sleet at length stood 

 athwart the Tropic of Cancer on the crumbling summit of Mt. Morrison 

 13072 ft. above sea-level, the highest mountain in the Japanese Empire 

 and the loftiest peak between the Sierra Nevadas of western North Amer- 

 ica and the snow-clad ranges of the Chino-Thibetan borderland. As a 

 souvenir of the conquest I gathered seeds of this Rhododendron on the 

 peak of Mt. Morrison (I could have collected them lower down) which 

 were sent to the Arnold Arboretum and distributed. This species is now 

 growing in gardens in the British Isles and elsewhere but I have not 

 heard that it has flowered. It was discovered prior to 1900 en Mt. 

 Morrison by a Japanese named Yamashita, and wrongly referred by 

 Matsumura to R. chrysanthum Pallas, a species with which it has very 

 little in common. It was rediscovered in the same locality by Messrs. 



