Anacardiaceae 



597 



2A. Panicles axillao'; leaf rachis wingless; fruit whitish. 

 3A. Fruit glabrous. 



'lA. Branchlcts and leaves glabrous 2. R. succedanea 



4B. Branches and under side of leaflets on nerves pubescent. 



5A. Leaflets to 16 cm. long, 7 cm. wide; lateral nerves rather distant, more than 5 mm. apart 3. R. verniciflua 



5B. Leaflets to 12 cm. long, 4 cm. wide; lateral nerves close together, about 5 mm. or less apart 4. i?. syhcslris 



3B. Fruit hispid; leaflets 4-10 cm. long, pubescent beneath 5. R. trichocarpa 



2B. Panicles terminal; leaf rachis winged; fruit red when mature, hairy 6. R. javanica 



1. Rhus ambigua Lavall. ex Dipp. R. oricntalis with spreading yellowish brown hairs; flowers yellowish green; 

 (Greene) C. K. Schn.; R. toxicodendron var. radicans sensu fruit slightly flattened, 6-8 mm. long, pale yellow, smooth, 



auct. Japon., non A. Gray; R. toxicodendron var. hispida Engl.; lustrous. May. Cultivated in the warmer parts of our area 



Toxicodendron orientale Greene Tsuta-urushi. Woody for the production of lacquer. China and India. Poisonous. 



dioecious vine with aerial climbing roots; branchlcts with 4. Rhus sylvestris Sieb. & Zucc. Toxicodendron sylvestre 



short, appressed brown puberulence; leaves with petioles 3-6 (Sieb. & Zucc.) O. Kuntze Yama-haze, Haze. Deciduous 



cm. long, the leaflets 3, elliptic or ovate, 5-15 cm. long, tree; branches thick, densely yellowish brown pubescent; leaves 



3-8(-10) cm. wide, abruptly acuminate, obtuse to subacute at 25-40 cm. long inclusive of the petiole, the leaflets 9-13, 



base, the terminal one short-petioluled, the lateral ones nearly yellowish brown pubescent, broadly lanceolate to narrowly ob- 



sessile, entire in the adult, often appressed-pubescent on nerves, long, 7-12 cm. long, 2-4 cm. wide, short- or abruptly acumi- 



with persistent axillary tufts of hairs beneath, glabrous on up- nate, obliquely rounded to broadly cuneate at base, entire, the 



per side; inflorescence axillary, 3-5 cm. long; flowers short- lateral nerves numerous, rather densely parallel, slightly 



pedicellate, the petals pale yellow, about 3 mm. long, oblong, arcuate above; inflorescence a panicle 8-15 cm. long, spreading- 



recurved above; fruit pale yellow, obliquely depressed-globose, pilose; fruit yellow-brown, rather flat, compressed-globose, 8-10 



5-6 mm. long, glabrous or sparsely spiny-hispid. May-June. mm. across, glabrous. May-June. Low mountains; Hon- 



Woods in mountains; Hokkaido, Honshu, Shikoku, Kyushu; shu (Tokaido Distr. and westw.), Shikoku, Kyushu. 



common; poisonous. Sakhalin, s. Kuriles, China, and For- Ryukyus, Formosa, China, and Korea. 



mosa. Forma rishiriensis (Nakai) Hara. R. rishiriensis 5. Rhus trichocai-pa Miq. Toxicodendron trichocarpttm 



Nakai Rishiri-tsota-urushi. Stems to 2 m. long, scarcely (Miq.) O. Kuntze Yama-urushi. Deciduous, dioecious 



scandent. Reported from Hokkaido. tree; branches thick, yellowish brown pubescent; leaves 25-45 



2. Rhus succedanea L. R. succedanea var. japonica cm. long inclusive of the petiole, the leaflets 13-17, ovate, 



Engl.; Toxicodendron succedaneum (L.) O. Kuntze Haze, obovate-elliptic or elliptic, 5-10 cm. long, 3-5 cm. wide, 



Ryukyu-haze, Haze-no-ki. Deciduous, dioecious tree, gla- abruptly acute, slightly oblique at base, entire or coarsely 

 brous except for yellowish brown pubescence on the margins toothed, yellowish brown pubescent beneath; panicles axillary, 

 and inner sides of the bud-scales; branches rather thick; leaves 15-30 cm. long inclusive of the peduncle, yellowish brown 

 odd-pinnate, 25-35 cm. long inclusive of the petioles 6-8 cm. pubescent; flowers yellowish green, small, short-pedicellate; 

 long, the leaflets 9-15, broadly lanceolate or narrowly ob- filaments slender, longer than the petals; fruit obliquely corn- 

 long, 5-9 cm. long, 18-30 mm. wide, long-acuminate, acutish pressed-globose, 5-6 mm. across, yellowish, short-hispid, the 

 on inner side, semirounded on outer side at base, entire, some- exocarp easily peeled ofT and exposing the whitish mesocarp. 



times glaucous beneath, the lateral nerves close together, 4 May-June. Hills and mountains; Hokkaido, Honshu, 



mm. or less apart, the rachis terete, wingless; panicles axillary, Shikoku, Kyushu; common. s. Kuriles, Korea, and China. 



peduncled, 10-20 cm. long inclusive of the peduncles; flowers 6. Rhus javanica L. R. chinensis Mill.; R. semialata 



small, yellowish green; fruit depressed-globose, 8-10 mm. Murr.; R. semialata var. osbeckji DC; R. osbec\ii (DC.) 



across, slighdy flattened, lustrous, glabrous, smooth, pale yel- Decne. ex Steud. Nurude, Fushi-no-ki. Deciduous, 



low. May-June. Honshu, Shikoku, Kyushu; often planted dioecious tree; branches rather thick, densely yellowish brown 



for yielding wax. Ryukyus, Formosa, China, Malaysia, and pubescent when young; leaves 25-40 cm. long inclusive of the 



India. petiole, the rachis winged, the leaflets 7-13, oblong to ovate- 



3. Rhus verniciflua Stokes. R. vernicifera DC; R. oblong, 5-12 cm. long, 2.5-6 cm. wide, abruptly acuminate, 



\aempjeri Sweet Urushi. Deciduous, dioecious tree; cuneate to rounded at base, coarsely toothed, glabrate on upper 



branches thick, with numerous, prominently raised lenticels, side, brownish pubescent beneath; panicles terminal, broad, 



with yellowish brown hairs while young; leaves 10-30 cm. 15-30 cm. long, brownish pubescent; flowers yellowish, small; 



long, on petioles 4-10 cm. long, the leaflets 9-11, ovate-oblong, filaments nearly as long as the petals; fruit subglobose, reddish 



sometimes ovate or oblong, 7-15 cm. long, 3-6 cm. wide, yellow, densely yellowish brown puberulent, about 4 mm. 



abrupdy acuminate, subobtuse at base, slightly oblique in the across. Aug.-Sept. Hills, lowlands, and mountains; Hok- 



lateral ones, entire, often pilose on upper side, spreading- kaido, Honshu, Shikoku, Kyushu; common. Ryukyus, For- 



pubescent at least on nerves beneath; panicles 15-30 cm. long, mosa, Korea, Manchuria, and China to Malaysia. 



2. CHOEROSPONDIAS Burtt & A. W. Hill Chanchin-modoki Zoku 



Polygamodioecious trees; leaves odd-pinnate, the leaflets 7-15, entire, tlie lateral nerves spreading; staminate flowers in pani- 

 cles, the pistillate solitary or few; calyx cup-shaped, obtusely 5-lobed; petals 5, free, imbricate; stamens 10, the filaments con- 

 nate and adnate to the 10-lobed disc at the base; ovary superior, ovoid, 5-locular; styles 5, free just below the apex, the 

 stigma capitate; ovules solitary in each locule, pendulous; fruit ovoid, drupe-like, the stone surrounding the seeds horny, 5- 

 locular, each with a membranous pore at apex. .\ single species. 



