694 Ericaceae 



lOB. Leaves alternate. 



12A. Leaves scalelike, very many and very densely arranged; flowers terminal and solitary; fruit a dry capsule. . . 10. Harrimanelh 

 12B. Leaves well developed, not scalelike. 



13A. Leaves and young branches with many yellow-brown discoid sessile glands; calyx 5-sected, the segments imbricate in 



bud; fruit dry \\. Chamaedaphne 



13B. Leaves and branches without sessile discoid glands. 



14A. Prostrate shrub; flowers reddish or pink; placentae thickened, becoming fleshy 12. Epigaea 



14B. Erect shrubs; flowers white to pinkish; placentae not becoming fleshy. 



15A. Bracts and bracteoles persistent or nearly so; seeds small, many. 



16A. Inflorescence racemose or subcorymbose with a distinct axis. 



17A. Calyx-lobes imbricate in bud 13. Leticothoe 



17b. Calyx-lobes valvate in bud. 



18A. Valves of capsules not thickened on margin; evergreen trees or shrubs 14. Pieris 



18B. Valves of capsules thickened and hardened on margin; deciduous or half-evergreen trees or shrubs. 



15. Lyonia 



16B. Inflorescence umbellate, without a distinct axis 16. Andromeda 



15B. Bracts and bracteoles absent or very small, often caducous; inflorescence umbellate or racemose-corymbose; seeds few 



and relatively large 17. En\ianthus 



9B. Fruit a berry or berrylike, enveloped by the thickened fleshy calyx-lobes. 



19A. Calyx becoming accrescent, fleshy and enveloping the capsule; evergreen shrubs 18. Gaultheria 



19B. Calyx not accrescent, dry, not enveloping the capsule; deciduous shrubs 19. Arctous 



IB. Ovary inferior or half -inferior; fruit a berry or berrylike drupe; calyx persistent. 



20A. Prostrate creeping shrub; ovary half-inferior; fruit white 20. Chiogenes 



20B. Erect shrubs; ovary wholly inferior; fruit red or blue-black 21. Vaccinium 



1. TRIPETALEIA Sieb. & Zucc. Ho-tsutsuji Zoku 



Deciduous shrubs with entire, short-petiolate, alternate leaves; flowers in terminal panicles or racemes, white, sometimes 

 roseate, bracteate and bracteolate; calyx small and cuplike with die margin toothed or of free segments; petals 3, free, reflexed; 

 stamens 6, the filaments often dilated, the anthers longitudinally split above, without an appendage; ovary 3-locuIar, the ovules 

 many in each locule; style slender, more or less curved upward, the stigma obsoletely 3-lobed; capsules septicidally dehiscent, 

 often short-stipitate; seeds ovoid or ellipsoidal. Two species, in Japan. 



lA. Sepals free, 4-5 mm. long; capsules nearly sessile, 4-5 mm. across; inflorescence a few-flowered raceme; branches nearly terete, ob- 

 tusely striate; leaves rounded to obtuse; bracts foliaceous, 5-10 mm. long 1. T. bracteata 



IB. Sepals united, the calyx cup-shaped, 1-2 mm. long and wide, with 5 undulate-deltoid teeth; capsules distinctly stipitate, about 3 mm. 

 across; inflorescence a rather many-flowered panicle; branches acutely angled; leaves usually acute, the tip obtuse; bracts 2-4 mm. 

 long 2. T. paniculata 



1. Tripetaleia bracteata Maxim. Elliottia bracteata var. angustifolia Maxim.; Gautiera triquetra Sieb. & Zucc. pro 

 (Maxim.) Benth. & Hook, f.; Botryostege bracteata (Maxim.) parte; Elliottia paniculata (Sieb. & Zucc.) Benth. & Hook, f.; 



Stapf MiYAMA-Ho-TsuTsuji, Hako-tsutsuji. Much- T. ya\ushimensis Nakai; T. paniculata var. ya\ushiinensis 



branched shrub with red-brown, nearly terete, obtusely striate (Nakai) Kitam.; T. paniculata var. latifolia Maxim. Ho- 



branchlets; leaves obovate, 2.5-6 cm. long, 12-20 mm. wide, tsutsdji. Erect branched shrub with red-brown, 3-angled, 

 rounded to very obtuse and mucronate, subcuneate at base, glabrous branchlets; leaves obovate, to narrowly ovate-elliptic, 

 glabrous or slightly cilia te while young, the petioles 1-2 mm. 3-8 cm. long, 1.5-3 cm. wide, acute to obtuse, acute at base, 

 long; racemes 3- to 8-9owered, 6-10 cm. long, inclusive of the entire, spreading-puberulent beneath, the midrib puberulent on 

 peduncles, puberulous, the bracts elliptic or obovate, green and upper and lower side, the petioles 1-2 mm. long; panicles 7-15 

 foliaceous, 5-10 mm. long, rounded to very obtuse; flowers cm. long inclusive of the peduncle, rather densely many-flow- 

 greenish white; sepals acute or obtuse, slightly ciliolate; petals ered, puberulent, the bracts subulate-linear, 2-4 mm. long; 



oblong, recurved, 8-10 mm. long. July-Aug. High moun- flowers small, white to roseate; calyx cup-shaped, about 2 mm. 



tains; Hokkaido, Honshu (centr. and n. distr.); common across; petals 6-8 mm. long; fruit about 3 mm. across, the 



northw. stipe short, about 1 mm. long. Aug.-Sept. Mountains; 



2. Tripetaleia paniculata Sieb. & Zucc. T. paniculata Hokkaido, Honshu, Shikoku, Kyushu; rather common. 



2. LEDUM L. Iso-TsuTsuji Zoku 



Small decumbent or ascending glandular shrubs; leaves evergreen, alternate, short-petiolate, usually rusty-pubescent, rather 

 coriaceous, linear to lanceolate, entire with recurved or revolute margins; flowers many, white, in terminal sessile corymbs, the 

 pedicels bracteate; calyx small, 5-toothed; petals 5, imbricate in bud, free; stamens 5 to 10, exserted, the filaments filiform, the 

 anthers small; disc small, annular, 8- to 10-lobed; ovary 5-locular, densely glandular-dotted; styles filiform, the stigma 5-lobed; 

 capsules ellipsoidal; seeds many. Few species, in the cooler parts of the N. Hemisphere. 



1. Ledum palustre L. var. diversipilosum Nakai. L. L. palustre var. groenlandicum sensu Nakai, non Rosenvinge; 



palustre var. dilatatum sensu auct. Japon., non Wahlenb.; L. hypoleucum Komar. Iso-tsutsuji. Rusty-tomentose, 



L. palustre var. nipponicum Nakai, and var. yesoense Nakai; erect, aromatic shrub, 30-50 cm. high; leaves coriaceous, lance- 



