Pieris] LXIV. ERICACEAE 409 



6. PIERIS, D. Don ; Fl Brit. Ind. iii. 400. 

 (Included under Lijonia, Nutt, by Drude in Engler u. Prantl iv. 1. 44.) 



Trees or shrubs. Fl. pentamerous, in bracteate racemes, pedicels bracteolate. 

 Ovary 5-celled, capsule loculicidally o-valved, seeds x linear-oblong, not 

 winged or fringed, testa loose. Species 12, from the Himalaya to Japan. 

 Mexico and N.-E. America. 



1. P. ovalifolia, D.Don; Collett Simla FL, 293, Fig. 89.— Syn. Andromeda 

 ovalifolia, Wall. ; Wight Ic. t. 1199 ; Brandis F. Fl. 280. Yern. Allan, Pb. ; 

 Erau, Terta, Ladrang, Bash.; Ai/ar, Anyar, Hind. 



A small deciduous tree, 1. ovate- or elliptic-oblong, entire, acute or shortly 

 acuminate, often pubescent when young, base rounded, blade 3-8, pet. J— f in. 

 long. Racemes axillary more or less pubescent, 4-10 in. long, fl. white, some- 

 times pink or blueish, calyx-teeth triangular, corolla \-\ in. long, filaments 

 hair}-, with 2 horns near the apex. 



Outer Himalaya, in the North West -1-8,000 ft. often associate*! with Qiiercus incana 



ami Rhododendron arbor eum, in Sikkiin associated with Sal in the Tista valley at 'J. 



ami with the Rhododendrons of Tonglo at 10,000 ft. (Gamble). Khasi hills. The 

 Sikkiin and Khasi hills specimens have a longer corolla. Burma; Kachin hills. 

 Bernard myo and headwaters of Yunzalin 5-7,000 ft. — China, Japan. Fl. April-June. 

 2. P. villosa, Hook. f. Himalaya higher ranges 10-13,000 ft. Garhwal to Sikkim 

 (probably in Jaunsar at 7,500 ft.. Gamble Ind. Tinih. ii.ed. 431). A small tree, similar 

 in 1. but 1. smaller, villous beneath, calyx-tube linear-lanceolate, corolla broadly cam- 

 panulate, no horns at the top of filaments. 3. P. formosa, D. Don (Ami riminla fbrmosa, 

 Wall. : Wight Io. t. 1200). Himalaya 6-10,000 ft. from Nepal eastwards. Khasi hills. 

 Manipur. A small, evergreen, glabrous tree, 1. coriaceous, lanceolate, serrate, blade 

 3-5, pet. 1 in. Bacemes in large terminal panicles, corolla white, filaments with 2 

 horns at the end. 



Leucothoe Grifflthiana, < 'lorke. Bhutan. 6,800 ft. Branchlets flexuose, 1. long acumi- 

 nate, entire or minutely serrulate upwards, blade 1-0. pet. J in. long. Bacemes axillary, 

 3-5 in. long. Capsule depressed-globose ^ in. diam. Seeds fiat nearly orbicular, edge 

 with a dense fringe of short blunt unicellular hairs. 



7. RHODODENDRON, Linn.: Fl. Brit. Ind. iii. 462. 



Small trees or shrubs, often epiphytic (the species here described evergreen, 

 the deciduous species commonly known as Azalea). L. entire, usually coria- 

 ceous and crowded at the ends of branches. Fl. showy, as a rule large, mostly 

 in terminal clusters or umbelliform corymbs, bracts at the base of peduncle 

 numerous, largo, coriaceous, deciduous, enclosing the buds. Calyx 5-lobed, 

 entire or obsolete. Corolla widely funnel-shaped, campanulate or cylindric, 

 lobes 5-10, anthers oblong, opening by terminal pores. Ovary 5-20-celled, 

 ovules ■/.. Capsule septicidally 5-20-valved from the apex, the valves breaking 

 away from the placentas. Seeds r, testa often produced at tin' ends, one end 

 frequently filiate. Species 21 K ), chioih in Kustern Asia, a smaller number iu 



temperate North A rica, a few in Europe and Western Asia, 1 in tropical 



Australia. 



I. Capsule cylindric, valves woody or coriaceous, the placentas remaining 

 attached to the central axis. 



A. Underside of I. without glandular scales, calyx-lobes short or obsolete 

 m>t enlarged in fr. 



a. ( 'orolla-lohes .">, stamens H K 

 a. Corolla purple, rose or white, underside of 1. hairy. 



1. R. arboreum, Sm.; Wall. PI. As. Rar. t. L23; Wight III. t. 140 and 

 Ic. t. 1201; Bedd. Fl. Sylv t. 228. Syn. R. nilagiricum, Zenker ; R. Camp- 



