Rutaceae; Simaroubaceae; Meliaceae; Polygalaceae 



585 



1. Citrus tachibana (Makino) T. Tanaka. C. auran- 



tittm var. tachibana Makino Tachibana. Large glabrous 



shrub; branches 3-angIed, with scattered spines 2-20 mm. long; 

 leaves chartaceous, narrowly ovate, 3-8 cm. long, 1.5-3.5 cm. 

 wide, acute with an emarginate tip, obtuse to broadly cuneate 

 at base, entire, the petioles 5-12 mm. long, narrowly winged; 

 flowers solitary or in pairs, terminal and axillary, the pedicels 



about 5 mm. long; calyx cup-shaped, the lobes depressed 3- 

 angular; petals 5, ascending, white, narrowly obovate-oblong, 

 about 12 mm. long, acute; stamens about 20; fruit depressed- 

 globose, yellow when mature, 2-2.5 cm. across. June. 



Honshu (Izu, Kii, and Nagato Prov.), Shikoku, Kyushu. 



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



Fam. 111. SIMAROUBACEAE Nigaki Ka Quassia Family 



Trees or shrubs usually with bitter bark; leaves commonly alternate, pinnate, rarely simple, without pellucid glands; flowers 

 bisexual or unisexual, actinomorphic, usually small, in panicles or spikes; sepals 3-5, more or less connate at base; petals 3-5 

 or absent; stamens t%vice as many as the sepals; ovary superior, surrounded by a prominent disc; carpels 2-5, free at base; 

 style or stigma variously connate to the base; ovules 1 to several in each locule; fruit a drupe, rarely a berry or samara, the seeds 

 with or without a scanty endosperm. About 28 genera, with about 150 species, chiefly in the Tropics. 



1. PICRASMA Bl. 



Nigaki Zoku 



Deciduous trees; leaves alternate, odd-pinnate, fasciculate toward the top of the branchlets; flowers polygamous, small, in 

 pedunculate, axillary cymes; sepals 4 or 5, small, ovate, persistent; petals as many as the sepals, oblong, nearly valvate; stamens 

 as many as the petals and longer, inserted at the base of a 4- or 5-lobed disc; carpels 2-5, free, with a connate common style at the 

 apex; fruit of 1-5 globose-obovoid druplets, the seeds without endosperm. ^About 8 species, in the Tropics and subtropics. 



1. Picrasma quassioides (D. Don) Benn. Simaba 

 qtiassioides D. Don; Rhus ailanthoides Bunge; P. ailanthoides 



(Bunge) Planch.; P. japonica A. Gray Nigaki. Gla- 



brescent tree; leaves 20-30 cm. long, the petioles 2-4 cm. long, 

 the stipules caducous, small, lanceolate, the leaflets subsessile, 

 oblique, narrowly ovate to broadly lanceolate or oblong, 4-10 

 cm. long, 1.5-3 cm. wide, long-acuminate with an obtuse dp, 

 acute to broadly cuneate at base, obtusely toothed, glabrous or 



nearly so; cymes axillary, on peduncles 4-10 cm. long, puber- 

 ulous, loosely many-flowered, 4-7 cm. across; flowers yellowish 

 green; sepals ovate; petals obovate, persistent, spreading, 3-^ 

 mm. long; drupelets obovoid-globose, 6-7 mm. long. May- 

 June. Woods in lowlands and hills; Hokkaido, Honshu, Shi- 

 koku, Kyushu; common. Ryukyus, Formosa, Korea, China, 



and India. 



Fam. 112. MELIACEAE Sendan Ka Mahogany Family 



Trees or shrubs, rarely herbs; leaves usually alternate, pinnate, rarely simple, exstipulate; flowers bisexual, rarely unisexual, 

 actinomorphic, commonly in axillary cymes; sepals 4-6, usually connate at base, imbricate, as many as the petals; stamens usually 

 twice as many as the petals, commonly connate at base into a tube; ovary superior, 2- to 5-locular, with a disc at base, with 1 or 



2 ovules in each locule; fruit a berry, drupe or capsule; seeds sometimes winged, the endosperm present or absent. About 50 



genera, with about 800 species, chiefly in the Tropics. 



1. MELIA L. 



Sendan Zoku 



Deciduous trees or shrubs; leaves alternate, twice-pinnate, the leaflets entire or toothed; flowers bisexual, in axillary panicles; 

 calyx 5- or 6-parted, die segments small; petals 5 or 6, free, imbricate; stamens 10-12, the filaments connate into a tube, 

 the anthers attached on the inner side above and alternate with the lobes at die summit of the tube; ovary on a short disc, 5- 



to 8-locular, terminated by a cylindrical style, the ovules 2 in each locule; fruit a drupe, with fleshy exocarp. About 10 species, 



in s. Asia and Australia. 



1. Melia azedarach L. M. azedarach var. japonica (G. 



Don) Makino; M. japonica G. Don Sendan. Tree with 



fine stellate pubescence when young; branches thick; leaves 

 alternate, petiolate, large, bipinnate, tripinnate, or rarely pin- 

 nate, the leaflets peUoluled, ovate or ovate-elliptic, 3-7 cm. 

 long, 1.2-2.5 cm. wide, chartaceous, abrupdy acuminate or 

 caudate with an obtuse point, oblique at base, green on upper 

 side, yellowish beneath; panicles axillary, 10-15 cm. long (in- 

 clusive of the peduncles 5-10 cm. long), 5-7 cm. wide, loosely 



many-flowered; flowers pale purple or rarely white, on short 

 pedicels; sepals ovate-oblong, 2-2.5 mm. long; petals oblong- 

 oblanceolate, 1-1.2 cm. long, spreading; stamens about 7 mm. 

 long, the tube about 2 mm. across; drupes ellipsoidal, yellow- 

 ish brown when mature, about 17 mm. long. May-June. 



Thickets in lowlands and hills; Shikoku, Kyushu; widely 

 planted in our area for ornamental purposes. Bonins, Ryu- 

 kyus, Formosa, e. and w. Asia. 



Fam. 113. POLYGALACEAE Hime-hagi Ka Milkwort Family 



Herbs or shrubs, sometimes small trees; leaves alternate, simple, exstipulate; flowers bisexual, zygomorphic; sepals 5, free, im- 

 bricate, the inner 2 larger, sometimes petallike; petals 3-5, the outer 2 free or connate with the lowest one, the upper 2 free, 

 scalelike or absent; stamens 8 or 4 or 5, monadelphous, connate to above the middle, rarely free, often adnate to the petals; 



