Symplocaceae; Styracaceae 



727 



Shikoku, Kyushu (Hiuga Prov., Yakushima and Tancga- 

 shima). Ryukyus. 



10. Symplocos liicida Sieb. & Zucc. Laurus lucida 

 Thunb.; Hopea lucida (Thunb.) Thunb.; S. japonica DC; 5. 

 japonica var. lucida (Sieb. & Zucc.) K. Koch; Bobua japonica 

 (DC.) Miers; B. lucida (Sieb. & Zucc.) Kaneh. & Sasaki, non 



Miers Kuro-ki. Resembles the preceding but smaller, 



more densely branched, the young branches trigonous, rather 

 stout, yellow-green when dry; leaves coriaceous, elliptic or ob- 

 long, 4-7 cm. long, 2-3.5 cm. wide, acute or obtuse, acute at 

 base, scarcely undulate-toothed near tip, the midrib slighdy 

 raised on both sides, the petioles 7-15 mm. long, rather thick; 

 flowers sessile, in dense axillary heads, gray-brown, hairy, the 

 axis very short, the bracts and bracteoles depressed-cordate; 

 caljrx-teeth cordate, ciliolate; corolla about 8 mm. across; fruit 



oblong, black, about 15 mm. long. Mar.-Apr. Honshu 



(Izu and westw.), Shikoku, Kyushu; rather common. 



Ryukyus, Formosa, and Korea (Quelpaert Isl.). 



11. Symplocos pninifolia Sieb. & Zucc. Bobua pruni- 

 fdia (Sieb. & Zucc.) Miers; Dicalyx prunifolia (Sieb. & Zucc.) 



Hara Kurobai. Small, much-branched evergreen, gla- 

 brous tree, with branches terete, grayish to dark brown, rather 

 thick; leaves coriaceous, narrowly ellipdc, narrowly ovate- 

 elliptic, or oblong, 5-8 cm. long, 2-3 cm. wide, caudate, acute 

 at base, undulate-toothed, yellow-green beneath, the midrib 

 flat or slighdy impressed on upper side, raised beneath, the 

 petioles usually purplish brown, 1-1.5 cm. long; racemes 

 simple, 10- to 30-flowered, rather dense, 3-7 cm. long, brownish 

 puberulent, the pedicels 1.5-3 mm. long, the bracts orbicular, 

 3 mm. long, the bracteoles ovate, membranous, shorter than 

 the calyx; calyx-teeth depressed-orbicular, ciliolate; fruit nar- 

 rowly ovate, black, 6-7 mm. long. Apr.-May. Honshu 



(Kazusa and Awa Prov. and westw.), Shikoku, Kyushu. 



s. Korea and Ryukyus. Forma uiae (Makino) Ohwi. S. 



prunifolia var. uiae Makino; Bobua prunifolia var. uiae (Ma- 

 kino) Nakai; B. uiae (Makino) Nakai; Dicalyx prunifolia var. 



uiae (Makino) Hara Maruba-kurobai. Leaves elliptic 



to orbicular, 3-5 cm. long, 2.5-4.5 mm. wide, rounded at both 

 ends. Kii Prov. in Honshu. 



Fam. 165. STYRA.CACEAE Ego-no-ki ICa Styrax Family 



Shrubs or trees usually with stellate hairs; leaves alternate, simple, exstipulate; flowers acrinomorphic, bisexual, in terminal, 

 axillary, sometimes compound racemes; calyx-tube more or less adnate to the ovary, the teeth valvate in bud; corolla 4- to 

 7-lobed, valvate or imbricate in bud; stamens as many as and alternate with the corolla-lobes or twice as many, usually inserted 

 on the tube, the anthers 2-locular, longitudinally dehiscent; ovary superior or inferior, 3- to 5-locular; ovules 1 to many in each 

 locule, anatropous; style slender, 3- to 5-lobed; fruit a drupe or capsule, the calyx persistent; seeds sometimes winged, the endosperm 



copious. About 8 genera, with about 100 species, chiefly in the warmer and tropical regions of the N. Hemisphere, few in 



Africa. 



lA. Ovary superior; flowers in terminal or axillary racemes 1. Styrax 



IB. Ovary inferior; flowers in paniculate one-sided racemes 2. Pterostyrax 



1. STYRAX L. Ego-no-ki Zoku 



Shrubs or trees with stellate hairs, very rarely glabrous; leaves evergreen or deciduous, simple, entire or toothed; flowers usu- 

 ally white, in terminal or axillary racemes, usually pendulous; calyx campanulate, adnate at base to ovary or free, the limb 

 entire or minutely 5-toothed; corolla actinomorphic, 5-lobed, the lobes valvate or imbricate in bud; stamens 10, inserted at the 

 base or on the tube of the corolla, the filaments free or connate at base; ovary superior, 3-valved, the ovules few; styles slender; 

 fruit 1- or 2-seeded, irregularly dehiscent, the pericarp dry or fleshy. About 100 species, in temperate regions of the N. Hemi- 

 sphere. 



lA. Flowers few, on long slender pedicels; buds not covered by the base of the petioles; leaves ovate to narrowly oblong, 4-8 cm. long, 2-4 



cm. wide, simple-hairy to glabrous beneath 1.5. japonica 



IB. Flowers few to many, short-pedicclled; buds enclosed within the inflated base of the petioles; leaves obovate- to ovate- or rhombic- 

 orbicular, 1.5 times as long as wide or less, stellate-pubescent beneath. 

 2A. Leaves 10-20 cm. long; flowers rather many, in long racemes; pedicels longer than the calyx; corolla deeply 5-cleft, the tube slightly 



longer than the calyx and much shorter than the lobes 2. 5. obassia 



2B. Leaves 5-8 cm. long; flowers few, in short racemes; pedicels 0-3 mm. long, much shorter than the calyx; corolla shallowly 5-lobcd, 

 the tube longer than the lobes and calyx 3. 5. shiraiana 



1. Styrax japonica Sieb. & Zucc. Cyrta japonica (Sieb. 1-1.2 cm. in diameter, mucronate. May-June. Thickets 



& Zucc.) Miers Ego-no-ki. Much-branched small tree; and thin w'oods in mountains and hills; Hokkaido, Honshu, 



branchlets minutely stellate-pubescent while young; leaves Shikoku, Kyushu; very common. Ryukyus(?), Korea, 



membranous, ovate to narrowly oblong, 4-8 cm. long, 2-4 cm. China, Formosa, and Philippines. 



wide, acuminate to acute, acute at base, undulately toothed, Var. jippei-kawamurae (Yanagita) Hara. S. jippei-k_awa- 



usually glabrous and vivid green on upper side, pale green with murae Yanagita Ob.\-ego-no-ki. Larger plant with leaves 



tufts of axillary hairs beneath, the lateral nerves of 3-5 pairs, 5-10 cm. long, 3-5 cm. wide; flowers slightly larger. Hon- 



the petioles 3-7 mm. long; flowers 1-4, pendulous, in a.\illary shu (Izu Isls.). 



terminal or corymbose racemes, the pedicels 2-3 cm. long; 2. Styrax obassia Sieb. & Zucc. Haku-unboku. Small 

 calyx 4-5 mm. long; corolla about 2.5 cm. across, the tube not tree with horizontally spreading stellate-pubescent branches 

 exceeding the calyx in length, the lobes narrowly ovate, densely while young, becoming dark brown and the outer layer ex- 

 white stellate-puberulent externally; fruit ovoid or ellipsoidal, foliating; leaves membranous, ovate to obovate-orbicular, 10- 



