52 THE AZALEAS OF THE OLD WORLD 



fruit is conic-ovoid and is densely clothed with rufous, appressed and villose 

 pubescence. 



It is widely distributed and very common on the highlands of northern 

 Luzon. It is evidently a very pretty species and ought to be introduced into gar- 

 dens. The flowers vary considerably in color and No. 364 from Bontoc is said to 

 have white flowers. No. 351, also from Bontoc, has very slender branches and 

 small, elliptic, acute leaves and is very different in appearance from the other speci- 

 mens. I can find no morphological differences, and it appears to be simply a con- 

 dition; probably the plant from which the specimen was taken was growing in the 

 crevice of a boulder or of a cliff. 



Rhododendron rubropilosum Hayata in Jour. Coll. Sci. Tokyo, 



XXX. art. 1, 173 (Mat. Fl. Formos.) (1911). — Kanehira, Formos. 



Trees, 326, fig. 11 (1917). — Komatsu in Tokyo Bot. Mag. XXXII. 



[16] (1918). 



Rhododendron caryophyUum Hayata, Icon. PL Formos. III. 130, t. 23 (1913).— 

 Kanehira, Formos. Trees, 318, fig. 17 (1917). 



Formosa: prov. Kagi, east of Ari-san, alt. 2500-3300 m. February 



2 and 4, October 26, 1919, (Nos. 9728, 9779, 10,939) ; same locality, 



June, 1914, U. Faurie (Herb. Bur. Sci. Manila). 



On the grass-clad mountain-slopes east of Ari-san this species is common 

 between altitudes of 2300 and 3300 m. but I did not see it elsewhere. It is a narrow 

 shrub from 1 to 3 m. tall, with twiggy, rigid, ascending branches, which when 

 young are densely covered with appressed, flattened, gray to red-brown hairs. 

 The leaves are persistent, scattered on the free-growing shoots and crowded at 

 the tip of the branchlets; in shape they vary from oblong-lanceolate to elliptic- 

 lanceolate and are from 1 to 4 cm. long and from 0.5 to 1.7 cm. wide, acute, tipped 

 with a glandular mucro and narrowed at base; the upper surface is dark green, 

 with scattered, appressed, pale gray hairs and the underside is pale green and 

 clothed with flattened, appressed, gray to brown strigose hairs, which are especially 

 prominent on the midrib. The petiole is densely clad with appressed, flattened 

 hairs similar to those on the branches. The bud-scales of the flowers are pubescent 

 but not glandular. The flowers are of medium size, pink spotted with rose, short- 

 stalked and borne several together at the end of the branchlet; the corolla is fun- 

 nel-shape, with spreading lobes, and from 1.5 to 2.5 cm. across. Hayata gives the 

 number of stamens as 10 but on my specimens I find 7 or 8 only; they are 

 of unequal length but shorter than the corolla. The pistil overtops the stamens 

 and has a relatively stout, slightly curved style, villose at the base, and the ovary 

 is densely clothed with pale gray soft hairs. The fruit is ovoid-conic, from 0.5 

 to 0.8 cm. long and densely clothed with shaggy, gray-brown hairs. The type 

 specimen of R. caryophyUum which I have seen, has smaller leaves and flowers 

 than is usual in the species which is due to the fact that the specimens came from 

 a wind-swept slope near the altitudinal limits of the species. My No. 9779 is simi- 

 lar. In late October I found many plants in full bloom and apparently it is pre- 

 cocious in its habit of flowering. I collected seeds, and plants of this species are 

 now growing in the Arnold Arboretum and in several gardens in England. They 

 will not be hardy except in favored localities like Cornwall and California. 



Rhododendron tosaense Makino in Tokyo Bot. Mag. VI. 53 (1892); 

 in XVIII. 101 (1904). — Schneider, III. Handb. Laubholzk. II, 506 



