708 



Ericaceae 



midrib on upper side, the veinlets reticulate, impressed on 

 upper side, slighdy raised beneath; inflorescence 2-6 cm. long, 

 few-flowered, puberulent, the pedicels recurved, 5-7 mm. long, 

 the bracts broadly ovate, obtuse, the bracteoles broadly lanceo- 

 late; calyx-lobes deltoid, obtuse, accrescent after anthesis, be- 

 coming white and fleshy when mature, glabrous; corolla glo- 

 bose, white, about 6 mm. across; styles about 3 mm. long; fruit 



globose, about 6 mm. across. ^June-July. Coniferous woods 



and subalpine thickets; Hokkaido, Honshu (centr. and n. 



distr. and Mount Daisen in Hoki Prov.) . Sakhalin, Kuriles, 



and Aleutians. 



2. Caultheria adenothrix (Miq.) Maxim. Andromeda 

 adenothrix Miq.; Diplycosia adenothrix (Miq.) Nakai 



Aka-mono. Brownish red hairy small shrub with subter- 

 ranean creeping stems; aerial stems 10-30 cm. long, sparingly 

 branched, red-brown and glandular-tipped hairy; leaves coria- 

 ceous, lustrous, broadly ovate, 1.5-3 cm. long, 1-2 cm. wide, 

 acute to short-acuminate, undulate-toothed, glabrate, the vein- 

 lets prominent, the petioles 1-2 mm. long; flowers solitary, on 

 nodding peduncles 2-4 cm. long, the bracts and bracteoles 

 several, ovate, acute; calyx-lobes ovate, long-hirsute, red and 

 fleshy when mature, surrounding the capsule; corolla campanu- 



late, white, 7-8 mm. long; capsules about 8 mm. across. 



May-July. Coniferous woods and subalpine thickets; Hok- 

 kaido, Honshu, Shikoku. 



19. ARCTOUS Niedenzu Urashima-tsutsuji Zoku 



Dwarf creeping subshrubs; leaves mostly fascicled at top of branchlets, alternate, petiolate, toothed, persisting over winter al- 

 though not green; flowers few, pedicellate, in terminal sessile umbels, nodding; calyx 4- or 5-lobed; corolla urceolate, with 4 or 5 

 short lobes; stamens 8 or 10, the anthers 2-locular, opening by pores, with 2 protuberances on back; ovary 4- or 5-locular, 1-ovuled 

 in each locule; drupe globose, black or red, juicy, 4- or 5-stoned. About 3 species, in arctic and alpine regions of the N. Hemis- 

 phere. 



1. Arctous alpinus (L.) Niedenzu var. japonicus (Na- 

 kai) Ohwi. A. alpinus sensu auct. Japon., non Niedenzu; 

 Arctous japonicus Nakai; Arctostaphylos alpina var. japonica 

 (Nakai) Hult.; Arctous ruber Nakai excl. syn. Urashima- 

 tsutsuji. Stems creeping, the plants matted, 2-5 cm. high; 

 leaves thickish, mostly terminal on the branches, obovate to 

 broadly so, 3-7 cm. long, 1-2.5 cm. wide, obtuse to rounded, 

 with prominently impressed veinlets on upper side, serrulate, 



puberulent at base of the midrib on upper side, pale green and 

 glabrous beneath, the petioles winged; flowers white; corolla 

 about 4 mm. long, pilose inside; drupe glabrous, black, 7-8 

 mm. in diameter. June- July. Dry alpine slopes; Hok- 

 kaido, Honshu (centr. and n. distr.) ; rather rare. Kuriles, 



Sakhalin. The typical phase occurs in Siberia, Europe, and N. 

 America. 



20. CHIOGENES Salisb. Harigane-kazura Zoku 



Slender evergreen creeping subshrubs; leaves small, alternate, very short-petiolate; flowers small, axillary, solitary, nodding, 

 the pedicels bibracteolate; calyx-tube adnate to the lower half of the ovary, 4-lobed; corolla short-campanulate, deeply 4-fid; 

 stamens 8, the filaments short and broad, the anthers short, 2-locular, each locule barely 2-pointed and opening by a large median 



chink; ovary 4-locular, many-ovuled; berry globose or obovoid; seeds minute, rather flattened. Two species, one in Japan, 



another in e. N. America. 



1. Chiogenes japonica A. Gray. C. hispidula var. ja- 

 ponica (A. Gray) Makino; Gaultheria japonica (A. Gray) 

 Sleumer Harigane-kazura. Prostrate; stems very slen- 

 der, much branched, hardly more than 1 mm. in diameter; 

 leaves elliptic or obovate-elliptic, 5-10 mm. long, 3-6 mm. 

 wide, obtuse, undulate-margined, glabrous on upper side. 



scattered puberulent beneath, the petioles less than 1 mm. long; 

 flowers white, nodding, the pedicels glabrous, about 2 mm. 

 long, bibracteolate; fruit obovoid, 5-7 mm. in diameter, white, 



deflexed. Coniferous woods; Honshu (centr. and n. distr.); 



very rare. 



21. VACCINIUM L. Su-no-ki Zoku 



Evergreen or deciduous shrubs or subshrubs; leaves usually alternate, simple, entire or toothed, sessile or petiolate, linear-lan- 

 ceolate to suborbicular; flowers solitary or in axillary or terminal leafy racemes, bracteate and bracteolate; calyx-teeth 4 or 5, 

 sometimes obsolete; corolla tubular, urceolate, or campanulate, the limb 4- or 5-toothed or parted nearly to the base, the teeth 

 recurved; stamens 8 or 10, the anthers sometimes spurred on back, opening by pores; ovary inferior, 4- to 10-locular; berry red, 



purple-black, or white, several- to many-seeded, the calyx-lobes persistent. About 150 species, in cooler and Arctic regions of 



the N. Hemisphere and at high elevations in the Tropics. 



lA. Corolla urceolate, campanulate, or tubular, the lobes short, not recurved. 

 2A. Evergreen shrubs. 



3A. Large shrub 1-3 m. high; leaves 2.5-6 cm. long, acuminate; racemes 2-5 cm. long; berry purple-black \.V. bracteatum 



3B. Small shrub 5-20 cm. high; leaves 1-2.5 cm. long, rounded to very obtuse; racemes less than 2 cm. long; berry red. 



2. V. vitis-idaea 

 2B. Deciduous shrubs. 

 4A. Ovary 4- or 5-locular. 



5A. Anthers awnless; dwarf subshrub 2—5 cm. high; corolla campanulate; fruit red 3. V. praestans 



5B. Anthers awned; shrubs more than 5 cm. high; corolla urceolate. 



