Caryophyllaceae; Nymphaeaceae 435 



ciliolate, the cauline leaves narrowly oblanceolate, 2-5 cm. long, long, 3-8 mm. wide, sometimes oblanceolatc, acute, sessile, 

 2-6 mm. wide, gradually narrowed at base, subsessile; flowers glabrescent to short-pubescent, especially on margin; flowers 

 few at a node, the pedicels short, glabrous, tlie bracts membra- few, terminal, the pedicels very short, puberulent; caly.x tub- 

 nous; caly.x tubular in anthesis, clavate-obovate in fruit, gla- ular, 12-15 mm. long, puberulent; limb of petals cuncate- 

 brous, 6-7 mm. long, the teeth deltoid or broadly ovate-deltoid; obovate, bifid, 6-7 mm. long, pale rose to white; stamens 



limb of petals white, cuneate, 5-6 mm. long, deeply bifid; slighdy exserted; gynophore 6-7 mm. long. July-Aug. 



styles and stamens long-exserted; capsules 4-5 mm. long, the Meadows in lowlands, especially near the sea; Hokkaido. 



teeth recurved; seeds about 1 mm. long, with raised superficial Europe, Siberia, Korea, and Manchuria. 



cells. July-Aug. Hokkaido. Korea, .\mur, and Ussuri. Var. latifolia Turcz. Chishima-mantema. More densely 



3. Silene repens Pers. Karafuto-m.intema. Peren- long-hairy; leaves broadly oblanceolate to narrowly oblong, 



nial herb; stems erect, branched at base, 10-30 cm. long, with 5-15 mm. wide. Perhaps in Hokkaido (e. distr.). 



recur\ed short hairs; leaves lanceolate to narrowly so, 3-5 cm. 



Fam. 85. NYMPHAEACEAE Suiren Ka Waterlily Family 



Aquatic herbs widi creeping rhizomes; leaves long-perioled, involute in bud, often peltate, usually orbicular to cordate; flowers 

 usually solitary from the axils of radical leaves, usually rather large; sepals 3-5; petals 3 to many; stamens 6 to many, free, 

 the anthers erect, introrse or extrorse, longitudinally split, the locules adnate to the connective; carpels 3-8, free or united, 

 sometimes embedded in the upper surface of an enlarged obconical receptacle; stigma distinct, often disc- or ring-shaped; ovules 

 solitary in each locuie, orthotropous, pendulous or many; carpels free and indehiscent or united to form a fleshy or spongy fruit; 

 cotyledons fleshy. — About 8 genera, with about 60 species, cosmopolitan. 



lA. Plant with a gelatinous sheath; flowers small, reddish purple; sepals and petals 3; stamens 12-18 1. Brasenia 



IB. Plants without a gelatinous sheath; flowers relatively large; sepals 4-6; petals 5 to many; stamens many. 

 2A. Leaves floating or slightly elevated above water level; carpels united; ovules many. 



3A. Flowers yellow to orange-yellow; ovary inserted on the receptacle, superior; sepals, petals, and stamens inferior, free; sepals 5. 



2. Nuphar 

 3B. Flowers white or rose-purple; ovary more or less adnate to the receptacle; sepals, petals, and stamens attached to the periphery 



of the ovary; sepals 4. 

 4A. Leaves prickly, 30-120 cm. across; stigma-disc depressed, adnate to the inner wall of an enlarged, cup-shaped receptacle. 



3. Eiiryah 

 4B. Leaves unarmed, smaller; stigma-disc free from the receptacle; ovary semi-inferior 4. Nymphaea 



2B. Leaves elevated above water level often 1 m. or more on long petioles; flowers deep pink or rarely white; carpels free, embedded 

 in the flat-topped spongy receptacle; ovules 1 or 2 5. Nehimbo 



1. BRASENIA Schreb. Junsai Zoku 



Aquatic herb with transparent gelatinous sheath; stems elongate, branched, leafy; leaves alternate, floating, peltate, elliptic, 

 palmately ner\'ed, entire; flowers small, reddish purple, a.xillary; sepals 3, resembling the 3 petals; stamens 12-18, the filaments 

 subulate, the anthers laterally split; carpels 6-18, free; style short, the stigma lateral; ovules 2 or 3, pendulous, attached to the 

 dorsal wall; mature carpels coriaceous, indehiscent, 1- to 2-seeded; seeds with endosperm. One species. 



1. Brasenia schreberi J. F. Gmel. B. peltata Pursh; broadly lanceolate, obtuse, about 10 mm. long; petals linear- 



Hydropeltis purpurea Miclix.; B. purpurea (Michx.) Casp. oblong, obtuse, about 1.5 cm. long; anthers linear, about 4 mm. 



Junsai. Perennial herb with branched creeping rhi- long; style about 8 mm. long. May-Aug. Lakes and 



zomes; stems much elongated, slender, sparingly branched; ponds; Hokkaido, Honshu, Shikoku, Kyushu. e. Asia, In- 



leaves long-petioled, 6-10 cm. long, 4-6 cm. wide, purplish dia, Australia, w. Africa, and N. America, 

 beneath; flowers long-peduncled, about 2 cm. across; sepals 



2. NUPHAR Smith K6-hone Zoku 



Perennial herbs with stout thickened creeping rhizomes; leaves long-petiolate, radical, floating or briefly elevated above the 

 water, rounded-cordate to narrowly ovate, entire, sagittate; peduncles 1-flowered; flowers yellow or orange-yellow; sepals 5 or 6, 

 concave, petaloid, coriaceous, persistent, often becoming green in fruit; petals many, linear to spathulate or narrowly oblong; 

 stamens many, shorter than the sepals, inferior, the filaments short, flat, the anthers introrse; carpels many, united into a com- 

 pound ovary; stigma linear, the stigma-disc peltate; ovules many; fruit ovoid, berrylike; seeds with endosperm. Ten or more 



species, in the Old World and N. America. 



lA. Leaves narrowly ovate, raised above the water; stigma-disc dentate I. N. japoniaitn 



IB. Leaves floating. 



2A. Flowers broadly cup-shaped; filaments 1 or 2 times as long as the anthers; petioles terete 2. N. subintegerrimum 



23. Flowers ellipsoidal; filaments 3-10 times as long as the anthers; petioles slighdy flattened. 



3A. Petioles hollow; stigma-disc without a raised center 3 N. oguraense 



3B. Petioles solid; stigma-disc with a raised center H. N. pumilum 



