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Styracaceae; Oleaceae 



20 cm. long, 8-20 cm. wide, abruptly acute, usually rounded 

 at base, mucronate-toothed, vivid green and usually glabrous 

 above, densely white stellate-hairy beneath, lateral nerves 

 of 7-8 pairs, the petioles 5-25 (-30) mm. long; racemes 10-20 

 cm. long, rather many-flowered, the flowers stellate-pubescent; 

 calyx-limb mucronate; corolla about 2 cm. long, deeply 5-cleft; 



fruit white, stellate-pubescent, ovoid, mucronate. May-June. 



Hokkaido, Honshu, Shikoku, Kyushu; rather common. 



Korea, Manchuria, and China. 



3. Styrax shiraiana Makino. Strigilia shiraiana (Ma- 

 kino) Nakai — — Ko-hakuunboku. Large shrub, the young 

 branches stellate-pubescent, becoming gray-brown or purple- 

 brown, the outer layer of bark often exfoliating; leaves broadly 



rhombic to broadly rhombic-obovate, 5-8 cm. long, 4-7 cm. 

 wide, rounded to obtuse, broadly cuneate at base, abruptly 

 mucronate, deep green on upper side, irregularly large-toothed 

 near the tip, pale green and stellate-hairy while young be- 

 neath, the petioles 7-15 mm. long, stellate-hairy; racemes 3-6 

 cm. long, few-flowered, densely stellate-hairy, the bracts and 

 bracteoles persistent, linear, shorter than the calyx, the pedicels 

 0-3 mm. long; calyx-teeth narrowly deltoid; corolla 15-20 mm. 

 long; filaments connate at base into a short tube; fruit ellip- 

 soidal, 1-1.2 cm. long, stellate-hairy, mucronate. June. 



Mountains; Honshu (Kanto Distr. and westw.), Shikoku, 

 Kyushu; rare. 



2. PTEROSTYRAX Sieb. & Zucc. Asagara Zoku 



Small deciduous stellate-hairy trees or shrubs; leaves alternate, simple, rather large, membranous, toothed, pedolate; flowers 

 many, in one-sided paniculate racemes, white, bisexual, actinomorphic; calyx narrowly obconic or campanulate, 5-toothed; petals 

 5, scarcely connate at base, imbricate in bud; stamens 10, the filaments nearly free to connate and forming a tube; ovary inferior 

 or sometimes subinferior, 3- to 5-locular; ovules 4, in 2 series in each locule; styles slender, slightly longer than the stamens; 

 fruit a dry angular or winged 1- to 2-seeded drupe. About 4 species, in e. Asia. 



lA. Leaves 7-13 cm. long, pale green beneath, without long hairs, with 5-7 pairs of lateral nerves; fruit 5-angIed, densely gray-white, 

 stellate-hairy LP. corymbosa 



IB. Leaves grayish 10-20 cm. long, long white-hairy along the nerves beneath, especially in the axils, with (6-) 8-12 pairs of lateral 

 nerves; fruit 10-angled, hispid and minutely stellate-hairy 2. P. hispida 



1. Pterostyrax corymbosa Sieb. & Zucc. Halesia corym- 

 bosa (Sieb. & Zucc.) Nichols. Asagara. Small much- 

 branched tree with gray-brown branches, loosely appressed 

 stellate-hairy while young; leaves elliptic, or sometimes broadly 

 ovate or broadly obovate, rarely oblong, 7-13 cm. long, 4-8 cm. 

 wide, abruptly acute, rounded or sometimes broadly cuneate at 

 base, minutely toothed or subentire, loosely appressed-stellate 

 hairy on both sides, the petioles 1-3 cm. long; panicles nod- 

 ding, 8-12 cm. long, white stellate-hairy; flowers white, sub- 

 sessile, pendulous; calyx-teeth elongate-deltoid; corolla white, 

 8-10 mm. long, semi-expanding, the petals broadly oblanceo- 

 late; stamens tubular-connate, the longer ones alternate with 

 the shorter; fruit obovoid, 8-12 mm. long, 5-winged, stellate- 

 hairy and villous, the style base persistent.- ^May-June. 



Mountains; Honshu (Kinki Distr. and westw.), Shikoku, Kyu- 

 shu. China. 



2. Pterostyrax hispida Sieb. & Zucc. P. micrantha Sieb. 



& Zucc; Halesia hispida (Sieb. & Zucc.) Mast.; Decavenia 

 hispida (Sieb. & Zucc.) Koidz.; D. micrantha (Sieb. & Zucc.) 



Koidz.; D. japonica Koidz. Oba-.asagara. Small tree with 



pale brown glabrous branches; leaves oblong, obovate-oblong, 

 or narrowly elliptic, 10-20 (-25) cm. long, 5-8 (-10) cm. wide, 

 abruptly acute to short-acuminate, acute to subrounded at base, 

 mucronate-toothed, green and glabrous on upper side, except 

 for scattered stellate hairs on the nerves, usually whitish and 

 puberulent or nearly glabrous beneath, the nerves white-pubes- 

 cent, the petioles 7-25 mm. long; panicles nodding, 10-20 cm. 

 long, villous and white stellate-hairy; flowers nearly sessile, 

 pendulous; calyx-teeth deltoid; corolla semi-expanding, 6-8 

 mm. long, the lobes oblanceolate, 6-8 mm. long; fruit narrowly 

 obovoid, 7-8 mm. long, 10-ribbed, rather densely long-spread- 

 ing yellow-hispid, the style base persistent. June. Moun- 

 tains; Honshu, Shikoku, Kyushu. 



Fam. 166. OLEACEAE Mokusei Ka Olive Family 



Evergreen or deciduous trees, shrubs, or rarely vines; leaves opposite, very rarely alternate, simple or pinnate; stipules absent; 

 flowers bisexual or unisexual, actinomorphic; calyx lobed or toothed, rarely reduced; corolla usually 4-lobed, or the petals 4 and 

 free or rarely absent, imbricate or rarely induplicate in bud; stamens 2, rarely 4, disc absent; ovary superior, 2-locuIar; ovules 2 

 in each locule, pendulous or ascending, the placentation axile; fruit a capsule or berry or drupelike; seeds usually with endosperm. 

 About 20 genera, with more than 400 species, chiefly in temperate and tropical regions. 



lA. Fruit a berry or drupelike; leaves simple. 



2A. Corolla-lobes much longer than the tube L Chionanthus 



2B. Corolla-lobes as long as to shorter than the tube. 



3A. Flowers in terminal panicles; corolla-lobes valvate in bud 2. Ligustrum 



3B. Flowers in axillary fascicles or in cymes; corolla-lobes imbricate in bud 3. Osmanthus 



IB. Fruit a dry capsule or samara. 

 4 A. Fruit a capsule; leaves simple or rarely pinnate. 



5A. Flowers yellow; corolla-lobes imbricate in bud; branches hollow or with lamellate pith; leaves toothed or entire, simple or ternate. 



4. Forsythia 

 5B. Flowers white, rose-purple, or lilac, in terminal and axillary much-branched thyrsoid panicles; corolla-lobes valvate in bud; 



branches with solid pith; leaves usually simple, entire, rarely pinnatifid 5. Syringa 



4B. Fruit a samara; leaves pinnately compound 6. Fraxinus 



