Lythraceae; Rhizophoraceae; Alangiaceae 651 



deltoid, acuminate, about one-tliird as long as tiie calyx-tube; obovate-elliptic, sometimes nearly orbicular, 5-8 mm. long, 



petals less than half as long as the calyx-lobes, obovate-oblong, 3.5-6 mm. wide, rounded at apex, narrowed to the sessile base; 



obtuse; stamens 2; styles very short, with a capitellate stigma; inflorescence erect, 3-6 cm. long, small-leafy; flowers many in 



capsules globose or ellipsoidal, about 1 mm. across. Sept.- a terminal spike, red-purple, about 2.5 mm. across, the bracte- 



Oct. Wet places in lowlands; Honshu (Shimosa and westw.), oles lanceolate, slightly longer than the calyx-tube; calyx-tube 



Shikoku; rare. obconical, about 1 mm. long, the lobes 4, deltoid, acute, slightly 



6. Rotala rotundifolia (Roxb.) Koehne. Ammannia shorter than the tube; petals 4, obovate, 1.5 mm. long, red- 



rotundijolia Roxb. Hozaki-kikashicusa. Glabrous per- purple; stamens not exserted from calyx-lobes; capsules dehis- 



ennial; rhizomes slender, creeping; stems simple or sparsely cent, 4- or rarely 3-valved; styles short, the sdgma capitate. 



branched, 10-20 cm. long, erect, with ascending base, loosely May. Kyushu (Chikuzen, Chikugo, Higo Prov.). Ryu- 



Icafy, purplish red; leaves membranous, opposite, elliptic to kyus, Formosa, China, and India. 



Fam. 145. RHIZOPHORACEAE Hirugi Ka Mangrove Family 



Trees or shrubs of tidal marshes; branches inflated and jointed at the nodes; leaves usually coriaceous and simple, opposite, 

 stipulate, rarely alternate and e.xstipulate; inflorescence axillary; flowers bisexual; calyx-tube free or adnate to the ovary, the 

 lobes 3-14, persistent, valvate; petals small, sometimes laciniate, convolute or involute; stamens inserted on the disc, as many 

 as the petals or more, often in pairs, opposite the petals; anthers 4- or many-locular; ovary usually inferior, 2- to 6-locular, 

 rarely I-locular; ovules inserted on inner angle near top of the locule in pairs or rarely more; styles free or connate; fruit 

 usually indehiscent, 1-seeded; seeds sometimes with endosperm, often germinating on the plant and with a well-developed 



much-elongating hypocotyl; cotyledons cylindric or connate. About 17 genera, with about 60 species, the chief component 



of tropical mangrove forests. 



1. KANDELIA Wight & Arn. Me-hirugi Zoku 



Evergreen small tree witii terete branches; leaves thick-coriaceous, opposite, simple, petiolate, elliptic, obtuse, entire, the stipules 

 intrapetiolar, caducous; inflorescence a dichotomous cyme, the peduncles axillary; flowers few, white, rather large; calyx with a 

 cuplike caliculus, the tube short, adnate to the ovary at base, lobes 5-6, linear-lanceolate, coriaceous, valvate; petals 5-6, on a 

 fleshy disc, bifid, the lobes filiform-laciniate; stamens many, the filaments capillary; ovary semi-inferior, 1-locular, conical; style 

 filiform, the stigma 3-Iobed; ovules 6, in pairs on a central axis; fruit ovoid, coriaceous; seeds I, pendulous; germinating on the 

 plant, with the hypocotyl much-elongating before dropping to the ground. A single species, in se. Asia. 



1. Kandelia candel (L.) Druce. Rhizophora candel L.; about 3 mm. long, sepallike; calyx-tube short, the lobes linear- 



K. rheedii Wight & Arn. Me-hirugi, Ryukyu-kogai. Plant oblong, reflexed, about 16 mm. long; petals narrow, laciniate, 



glabrous, the branchlets rather thick, with slightly inflated about 1 cm. long; fruit ovoid, about 3 cm. long, surrounded 



nodes; leaves thick, deep green, lustrous, oblong to obovate- by the persistent reflexed caly.x-lobes. Aug. Muddy places 



oblong, sometimes elliptic, 5-10 cm. long, 3-5 cm. wide, near the mouth of rivers; Kyushu (s. distr. including Yaku- 



rounded and with a mucro at apex, acute at base, the petioles shima and Tanegashima). India, Malaysia, s. China, For- 



9-10 mm. long, narrowly winged; inflorescence shorter than mosa, and Ryukyus. 

 the leaves, short-peduncled, about 10-flowered, the bracteoles 



Fam. 146. ALANGIACEAE Uri-no-ki Ka Alangium Family 



shrubs or trees; leaves simple, alternate, exsripulate; flowers white or pale yellow, actinomorphic, bisexual, in axillary cymes, 

 pedicels jointed; calyx small, truncate, or the limb 4- to 10-toothed; petals 4-10, valvate, usually linear, revolute, sometimes con- 

 nate at base; stamens as many as the petals and alternate with them, or 2 to 4 times as many as the petals, pubescent inside, 

 the anthers 2-locular, linear, longitudinally dehiscent; ovary inferior, 1- or 2-locuIar; style simple, clavate, or 2- or 3-fid; ovules 



solitary, pendulous; drupe 1-seeded, crowned by the calyx-teeth and a disc; seeds with endosperm. A single genus with about 



20 species, in c. Asia, Malaysia, Australia, and Africa. 



1. ALANGIUM Lam. Uri-no-ki Zoku 

 Characters of the family. 



lA. Leaves cordate-orbicular, 4-anglcd, palmately 3- to 5(-7)-Iobcd, usually short-pubescent especially beneath; petals 6, 3-3.5 cm. long; 

 stamens about 3 cm. long, the anthers about J4 their length, the connective glabrous \. A. platanijolium 



IB. Leaves obliquely obovate to oblong, sometimes ovate, entire, obliquely truncate at base, nearly glabrous except for axillary tufts beneath; 

 petals 7, about 2 cm. long; stamens about 18 mm. long, the anthers about Yz their length, the connective densely apprcssed yellowish 

 pubescent on inner side at base 2, A. premnijoUttm 



1. Alangium platanifolium (Sieb. & Zucc.) Harms var. no-ki. Leaves deeply 3- to 5(-7)-cleft, the lobes ovate to nar- 



platanifolium. Marlca platanijolia Sieb. & Zucc; A. platani- rowly so, caudately long-acuminate. Honshu (western 



joliiim (Sieb. & Zucc.) Harms; A. platanijolium var. genuinum distr.), Shikoku, Kyushu; rare. Korea. 



Wanger.; M. platanijolia var. typica Makino Momiji-uri- Var. trilobum (Miq.) Ohwi. Marlea macrophylla Sieb. & 



