Ranunculaceae 



453 



10. Thalictrum filamentosum Maxim, var. tenerum 

 (Huth) Oliwi. T. tenerum Huth; T. tuberijerum var. te- 

 nerum (Huth) H. Boiss.; T. tuberijerum Maxim.; T. clavatum 

 sensu auct. Japon., non DC; T. tuberijerum var. glabrescens 



Honda; T. tuberijerum var. pubescens Honda Miyama- 



KARAMATSU. Rather slender, sometimes pubescent, rhi- 

 zomatous, perennial herb; stems erect, 20-70 cm. long; radical 

 leaves usually solitary, long-petiolate, 2- to 3-ternate, thinly 

 membranous, the stipels absent, the leaflets ovate to ovate- 

 oblong or ovate-orbicular, glaucescent beneath, 1.5-8 cm. long, 

 1-5 cm. wide, usually gradually narrowed above, obtuse, 

 cuneate to shallowly cordate at base, often 2- to 3-lobulate and 

 toothed, the cauline leaves 1-3, smaller, sessile, the stipules 

 nearly absent; inflorescence densely flowered, rather flat- 

 topped; flowers many, white; sepals elliptic; stamens rather 

 many, the filaments much dilated above, the anthers oblong, 

 about I mm. long; achenes 2-6, oblanceolate to narrowly obo- 

 vate, 3-5 mm. long, flattened laterally, 1- to 4-nerved on each 

 side, the stipe 3-4 mm. long; style rather thick and short, 

 about 0.5 mm. long, nearly straight, the stigma narrowly ob- 

 long. May-Aug. Woods and thickets in mountains; Hok- 

 kaido, Honshu, Shikoku, Kyushu. Korea, Manchuria, and 



s. Kuriles. 



Var. yakusimense (Koidz.) Tamura. T. ya\usimense 



Koidz.- -Yakushima-karamatsu. Plant small with the 



leaflets cuneate to rounded at base, the stipes on the achenes 



shorter. Kyushu (Yakushima). Korea, Manchuria, and 



s. Kuriles. The typical phase occurs in Amur, Manchuria, and 

 Korea. 



11. Thalictrum microspermum Ohwi. T. micro- 

 spermum var. si\o\ianum Honda; T. filamentosum var. si\o- 



kianum (Honda) Ohwi, excl. syn. nonnul. Kogome-kara- 



MATsu. Slender glabrous perennial herb; stems to 20 cm. 

 long, very slender, few-leaved, erect, simple; radical leaves 3- 

 ternate, the petioles 3-5 cm. long, the stipules entire (stipels 

 absent), the leaflets petiolulate, rhombic to deltoid-elliptic, 

 1-3.5 cm. long, glaucous beneath, thinly membranous, very 

 obtuse, cuneate to subtruncate at base, coarsely toothed on 

 upper margin; inflorescence corymbose-paniculate, about 10 

 cm. long and as wide, loosely many-flowered, the branches 

 spreading; flowers white, on long pedicels, the bracts linear, 

 about 1 mm. long; achenes 6-12, oblong-lanceolate, about 2 

 mm. long inclusive of the style, flattened laterally, straight, few- 

 nerved on each side, the stipe 3-4 mm. long, very slender, 



straight, the st>'le straight, very short. Apr.-May. Shikoku, 



Kyushu. 



12. Thalictrum integrilobum Maxim. T. filamen- 

 tosum var. integrilobum (Maxim.) Ohwi Nagaba-kara- 



MATsu. Slender glabrous rhizomatous perennial herb; radi- 

 cal leaves solitary, sometimes nearly as long as the stem, 3- to 

 4-ternate, the leaflets petiolulate, linear-lanceolate or linear- 



oblong, 1.5-3 cm. long, 3-5 mm. wide, obtuse, entire to obso- 

 letely few-toothed; corymbs few- to rather many-flowered, 

 somewhat convex, loose; flowers white, the pedicels 5-15 mm. 

 long; filaments linear-oblanceolate, slightly dilated above, often 

 twice as broad as the anther; achenes few, oblanceolate, 3-4 

 mm. long, the stipe 1.5-2 mm. long, the beak (style and 

 stigma) 0.8-1 mm. long, straight or nearly so, linear, with a 



linear stigma inside. Hokkaido (Mount Apoi in Hidaka 



Prov.) ; rare. 



13. Thalictrum watanabei Yatabe. T. capillipes Nakai 

 Tama-karamatsu. slender glabrous rhizomatous per- 

 ennial herb, some of the roots thickened near middle; stems 

 20-30 cm. long; radical leaves solitary, petiolate, 3- to 4-ternate, 

 the leaflets petiolulate, elliptic- to orbicular-rhombic, thinly 

 membranous, 1-2 cm. long, 7-15 mm. wide, obtuse to broadly 

 cuneate at base, sparsely coarse-toothed on the upper half; 

 cauline leaves 1-2, much reduced and sessile, ternate or bi- 

 ternate; corymbs loosely few to rather many-flowered, very 

 loose; flowers white, the pedicels 5-20 mm. long, obliquely 

 spreading, the filaments linear-oblanceolate, usually broader 

 than the anthers; achenes 3-6, lanceolate to oblanceolate, 3- 

 3.5 mm. long, the stipe 1.5-2 mm. long, the beak 1-1.5 mm. 



long, linear, straight, the stigma linear on inner side. June 



-Sept. Honshu (Totomi and Yamato Prov.), Shikoku, Kyu- 

 shu. 



14. Thalictrum nakamurae Koidz. Hime-miyama- 

 KARAMATsu. Closely resembles the preceding; roots short, 

 thickened near base; stems 20-30 cm. long, very slender; leaf- 

 lets orbicular to elliptic-orbicular, very rarely rhombic-orbicu- 

 lar, rounded to shallowly cordate; corymbs loosely few-flow- 

 ered; flowers white; filaments slightly broadened above; young 

 achenes oblanceolate to narrowly obovate, on slender stipes; 



style about 1 mm. long or less, slightly recurved at apex. 



July-Aug. Wet rocks in mountains; Honshu (Mount Ko- 

 magatake in Echigo and Mount Tanigawa in Kotsuke Prov.) ; 

 rare. 



15. Thalictrum toyamae Ohwi. Hire-furi-kara- 

 M.\Tsu. Glabrous, slender perennial herb (sometimes stolon- 

 iferous), some of the roots thickened; stems solitary, slender, 

 10-20 cm. long, loosely 1- to 3-leaved, with few divaricate 

 branches above; leaves without stipules and stipels, the radical 

 ones solitary, as long as the stems, 3-ternate, deltoid in outline, 

 7-15 cm. long and wide, the petioles 3-6 cm. long, the leaflets 

 thinly membranous, ovate- to orbicular-rhombic, 12-30 mm. 

 long and as wide, usually cuneate or rarely subcordate at base, 

 few-lobed, glaucescent beneath; cauline leaves ternate or sim- 

 ple, short-petiolate or sessile; achenes 5-10, oblong-fusiform, 

 1.7-2 mm. long, flattened laterally, weakly 2- to 3-ner\'ed on 

 each side, the stipe 1-1.2 mm. long; style about 2 mm. long, 



slender and slightly flexuous, stigmatic on inner side. June. 



Kyushu (Mount Kurokami in Hizen) ; rare. 



8. TRAUTVETTERIA Fisch. & Mey. Momiji-karamatsu Zoku 



Rather tall perennial herbs; leaves alternate, petiolate, palmately cleft, irregularly toothed; inflorescence paniculate-corymbose; 

 flowers small, white; sepals 3-5, caducous; petals absent; stamens many, the filaments slightiy dilated above; carpels many, 

 1-ovuled, glabrous, sessile; achenes ovate, rhombic in transverse section, ridged, slightly flattened laterally, rather inflated, ter- 

 minated by a short style. Two species, one in N. America and one in e. Asia. 



1. Trautvetteria japonica Sieb. & Zucc. T. palmata 



var. japonica (Sieb. & Zucc.) Huth Momiji-karamatsu. 



Rhizomes short-creeping, the plants sometimes stoloniferous; 



stems erect, 25-60 cm. long, 2- to 3-leaved, short appressed- 

 pubescent above; radical and lower cauline leaves long-peti- 

 olate, glabrous, cordate-orbicular or reniform-orbicular, 5-12 



