RUTACEAE 



583 



cm. long, petiolate, the leaflets 19-23, subscssile, broadly lanceo- 

 late, acuminate, emarginate, rounded at base, obtusely serrulate 

 with a pellucid gland in each sinus; inflorescence a dense 

 many-flowered terminal cyme; calyx-lobes minute, semi- 



rounded; petals greenish yellow, about 2.5 mm. long. July- 



Aug. Mountains; Honshu, Shikoku, Kyushu; rather com- 

 mon. s. Korea, China, Ryukyus, and Formosa. 



2. EVODIA Forst. 



GOSHUYU ZOKU 



Unarmed trees or shrubs; leaves opposite, odd-pinnate, ternate or simple, entire, pellucid-dotted; cymes axillary, often 

 compound in a terminal panicle; flowers unisexual, small; sepals 4 or 5, imbricate; petals 4 or 5, valvate or slightly imbricate; 

 disc urceolate, widi 4 or 5 undulate teeth; stamens 4 or 5, inserted on the base of the disc; ovary 4- or 5-pnrted, 4- or 5-locular; 

 style cylindric, simple, the stigma 4-!obed; ovules 2 in each locule; fruitlets 4 or 5, coriaceous, dehiscent, 2-valved, l(-2)-seeded; 



seeds ellipsoidal, the embryo straight, embedded in a fleshy endosperm. About 50 species, in e. and s. Asia, Australia, and 



Polynesia. 



1. Evodia glauca Miq. E. mcliaejolia sensu auct. Japon., 



non Benth. H.\m.\-sendan, Shim.\-kuroki, Ur.\jiro-goshu- 



Yu. Dioecious tree with appressed-puberulous, rather thick 

 branches; leaves 15-30 cm. long, on petioles 4-6 cm. long, the 

 leaflets 1 1-19, petiolulate, obliquely ovate or narrowly ovate, 

 4-7 cm. long, appressed-puberulous on upperside while young, 

 glaucous beneath, caudate, with an obtuse tip, entire, rounded 

 on outer margin and acute on inner margin at base; cymes 



terminal, densely many-flowered, puberulous; flowers small; 

 sepals 5, broadly ovate, ciliolate; petals 5, pubescent inside; 

 filaments in staminate flowers hairy at base on outer side; 

 ovary in pistillate flowers deeply 4- or 5-lobed, the style short 

 and puberulous, the stigma rather large, with 4 or 5 undulate 

 teeth; fruitlets densely white-puberulous inside; seeds ellip- 

 soidal, about 3 mm. long. Honshu (Nagato Prov.), Shi- 

 koku, Kyushu. Ryukyus, Formosa, and China. 



3. ORIXA Thunb. Ko-kusagi Zoku 



Deciduous, unarmed, dioecious shrub; leaves alternate, short-petiolate; flowers pale green, small, 4-merous, solitary or in 

 racemes; sepals ovate, connate at base; petals elliptic, imbricate; disc 4-lobed in staminate flowers; stamens 4; ovary in pistillate 

 flowers deeply 4-lobcd, with a short common style and 4-lobed stigma; fruidets 4, each 1-seeded and dehiscent, 2-valved; seeds 

 black, globose. One species in e. Asia. 



1. Orixa japonica Thunb. Othera orixa (Thunb.) 

 Lam.; Cclastrus orixa (Thunb.) Sieb. & Zucc; Ei'odia rami- 

 flora A. Gray; C. japonicits (Thunb.) K. Koch; C. dilatatus 



Thunb. Ko-KusAGi. Erect foetid shrub with grayish 



branches, slightiy puberulous while young; leaves alternate, 

 two together on one side, the petiole 5-10 mm. long, the blade 

 obovate, rhombic-ovate or elliptic, 5-12 cm. long, 3-7 cm. 

 wide, abrupdy acute with an obmse tip, puberulous especially 

 on nerves while young, entire or with a few irregular sinuses 



on margin; inflorescence axillary on the branches of the pre- 

 ceding year, the staminate inflorescences in few-flowered ra- 

 cemes, 2-3 cm. long, the bracts elliptic, membranous, decidu- 

 ous, 3-5 mm. long, the pedicels 3-6 mm. long, the pistillate 

 flowers solitary, the pedicels 1-2 cm. long; petals spreading, 

 about 3 mm. long, greenish; fruidets obliquely ellipsoidal, 

 8-10 mm. long, transversely nerved; seeds about 4 mm. long. 

 Apr.-May. Woods and thickets in low mountains; Hon- 

 shu, Shikoku, Kyushu; common. s. Korea and China. 



4. BOENNINGHAUSENIA Rekhenb. Matsu-kaze-s6 Zoku 



Slender, thin perennials with pellucid glands; stems terete, branched; leaves alternate, ternately 2- to 3-pinnate, the leaflets 

 entire; panicles compound, leafy at base; flowers white, bisexual; sepals small, 4, connate at base, persistent; petals 4, imbricate; 

 disc urceolate; stamens 6-8, inserted on the base of the disc; ovary sripitate, 4-lobed, 4-locular, the st\'le short, connate, deciduous; 

 ovules 6-8 in each locule; fruitlets free, 4, dehiscent ventrally, the seeds few in each fruitlet, black, tubercled, reniform, the 

 embryo fleshy. ^Two species, India and e. Asia. 



1. Boenninghausenia japonica Nakai. Rtita japonica 

 Sieb. ex Miq. in syn.; B. albiflora sensu auct. Japon., non Reich- 



enb.; B. albiflora var. japonica (Nakai) S. Suzuki Matsu- 



KAZE-so. Glaucous, glabrous, flaccid perennial: stems erect, 

 40-80 cm. long, branched above; leaves deltoid, the petioles 5- 

 10 cm. long, die leaflets obovate or elliptic, 1-2.5 cm. long, 7-20 

 mm. wide, rounded to emarginate, cuneate, acute or obtuse at 

 base, pellucid-dotted, entire, white beneath; panicles terminal. 



large, the bracts narrowly obovate, 4-6 mm. long, simple; 

 flowers white, on delicate pedicels; sepals oblong, about 1 mm. 

 long; petals ascending-spreading, oblong, about 4 mm. long; 

 stamens exserted; fruit on a stipe about 2 mm. long, the fruit- 

 lets ovoid, ascending, about 3 mm. long, the seeds dark brown, 



reniform, about 1.5 mm. long, tubercled. Aug.-Oct. 



Woods in mountains; Honshu (Kanto Distr. and vvest\v.), 

 Shikoku, Kyushu; common. 



5. PHELLODENDRON Ru 



pr. 



KiHADA Zoku 



Unarmed, deciduous, dioecious trees; leaves opposite, odd-pinnate, the leaflets petiolulate, ovate, with pellucid glands, nearly 

 entire; cymes terminal, peduncled; flowers small, yellowish green; sepals 5-8, ovate, small; petals as many as and much longer than 

 the sepals, oblong; stamens 5-6, exserted, reduced to staminodes in the pistillate flowers; ovary short-stipitatc, 5-locular, the style 



short, the stigma 5-lobed; drupe black, nearly globose, the drupelets 5, each with a single seed, the endosperm scanty. Few 



species, in e. Asia. 



