528 



ROSACEAE 



Apr.-June. Sunny slopes of hills; Hokkaido, Honshu, 



Shikoku, Kyushu; common. Korea, Manchuria, and Amur. 



15. Potentilla riparia Murata. Teri-ha-kimbai. Peren- 

 nial herb with slender elongate stolons to 80 cm. long; rhi- 

 zomes short, ascending, rather slender; leaves few, subcoria- 

 ceous, ternate, sparingly pilose, the terminal leaflet slightly 

 larger than the lateral, elliptic to obovate-elliptic, 2-5 cm. 

 long, 1-2 cm. wide, obtuse, cuneate at base; scapes slender, 

 10-25 cm. long, ascending, few-bracted and few-flowered; 

 flowers pale yellow, 12-13 mm. across; bracts of caliculus 

 shorter than the sepals, linear-oblanceolate; sepals 5, deltoid- 

 lanceolate, 4-5 mm. long, acute; petals 5, obovate, slightly 



emarginate; receptacle pilose. Apr.-June. Honshu (Kinki 



Distr. and westw.) ; rare. 



16. Potentilla cryptotaeniae Maxim. P. cryptotaeniae 



var. insularis Kitag. Mitsumoto-s6. Perennial herb with 



spreading pilose hairs; stems 50-100 cm. long, slightly 

 branched above; radical leaves withering before anthesis; 

 lower cauline leaves long-petioled, the upper sessile; stipule- 

 segments lanceolate to narrowly ovate, acute; leaflets 3, ovate 

 or narrowly so, or ovate-oblong, 3-8 cm. long, 2-3.5 cm. 

 wide, acute to short-acuminate, slightly appressed-pilose on 

 upper side, paler beneath, the teeth ovate, acute, often dupli- 

 cate; inflorescence branched, many-flowered; flowers about 

 10 mm. across; calyx-segments narrowly ovate, acuminate; 

 bracts of caliculus broadly lanceolate, subobtuse to acute; 

 petals yellow, broadly obovate, as long as the calyx-segments, 

 about 4 mm. long; anthers small, ovate-orbicular; receptacles 

 short-pilose; achenes many, about 0.8 mm. long, obsoletely 

 rugulose; styles rather stout, about 1 mm. long. June- 

 Sept. Mountains; Hokkaido, Honshu, Kyushu. 



17. Potentilla norvegica L. Ezo-no-mitsumoto-so. 

 Annual or biennial herb with long pilose hairs; stems 20-60 

 cm. long; leaves 5-foIiolate in the radical ones, 3-foliolate in 

 the cauline; stipules adnate to the petiole on lower half or 

 only at the base; leaflets obovate to oblong, obtuse to acute, 

 the teeth ovate to lanceolate; flowers many, densely arranged; 

 calyx-segments narrowly ovate, acute; petals obovate, shorter 

 than the calyx-segments; receptacles short-pilose; anthers 

 broadly elliptic, small; achenes broadly ovoid, about 0.7 mm. 

 long, rugulose, glabrous, keeled on back; styles rather stout, 



nearly as long as the achene. Hokkaido, Honshu (Shinano 



Prov.). Cold regions of the N. Hemisphere. 



18. Potentilla chinensis Ser. Kawara-saiko. Per- 

 ennial herb with stout rhizomes; stems 30-70 cm. long, long- 

 pubescent; leaves obovate to narrowly so; free portion of 

 stipules linear-lanceolate, green and laciniate to deeply toothed 

 in the cauline leaves; leaflets 15-29, the lower gradually 



smaller, the upper oblanceolate to narrowly oblong, 2-5 cm. 

 long, 8-15 mm. wide, pinnately parted nearly to the midrib 

 with acute lobes, nearly glabrous above, densely white-woolly- 

 tomentose beneath; flowers many, 10-15 mm., sometimes to 

 20 mm. across; calyx-segments narrowly ovate, acute; bracts of 

 caliculus lanceolate; anthers ovoid; receptacle hairy; achenes 

 broadly ovoid, longitudinally rugose, about 1.3 mm. long, 



keeled on back; styles rather stout, about 1 mm. long. 



June-Aug. Sandy sunny places, especially along rivers in low- 

 lands; Honshu, Shikoku, Kyushu. Korea, Manchuria, 



Amur, China, and Formosa. 



19. Potentilla nipponica T. Wolf. P. chinensis var. 



isomera Fr. & Sav.; P. isomera (Fr. & Sav.) Koidz. Hiro- 



HA-NO-KAWARA-SAiKO. Closely resembles the preceding, but 

 the stems slightly shorter, often ascending at base; leaflets 

 fewer, with shallower lobes; calyx-segments large, densely 



white-woolly; achenes smooth, glabrous. June-Aug. 



Sandy sunny places along rivers in lowlands; Hokkaido, Hon- 

 shu (n. and centr. distr.). 



20. Potentilla fruticosa L. Dasipliora fruticosa (L.) 



Rydb. KiNROBAi. Small branching shrub; leaflets elliptic 



to narrowly oblong, obtuse to acute, 1-2 cm. long, 3-10 mm. 

 wide, long-pubescent on both sides at least while young, the 

 uppermost lateral ones decurrent at base; flowers yellow, 2-2.5 

 cm. across, on white-hairy pedicels; calyx-segments ovate, 5-7 

 mm. long, with nerves raised in fruit; petals obovate; achenes 

 ovoid, lustrous, loosely pubescent with long hairs. June- 

 Aug. Alpine regions; Hokkaido, Honshu (n. and centr. 

 distr.). Northern and alpine regions of the N. Hemisphere. 



Var. mandshurica Maxim. P. fruticosa var. leucantha 



Makino Hakurobai. Leaflets often mucronate; flowers 



white. Alpine regions; Honshu (centr. and Kinki Distr.), 



Shikoku; rare. e. Siberia and n. China. 



21. Potentilla palustris (L.) Scop. Comarum palustre 



L.; P. comarum Nestl. Kurobana-roge. Stems rather 



stout, creeping and branching below, 30-60 cm. long, with 

 appressed silky pubescence above; leaflets 5-7 (rarely 3), 

 nearly sessile, narrowly oblong, 4-7 cm. long, 12-30 mm. 

 wide, green above, whitish beneath, with appressed silky 

 pubescence on both sides or glabrate on upper side; flowers 

 15-20 mm. across; calyx-segments narrowly ovate, 7-15 mm. 

 long, long-acuminate, pubescent; bracts of caliculus small; 

 petals ovate, purplish, shorter than the calyx-segments; re- 

 ceptacles pilose.- June-Aug. Wet places and shallow water 



around ponds and along ditches in lowlands and on moun- 

 tains; Hokkaido, Honshu (centr. and n. distr.). Cold 



regions of the N. Hemisphere. 



10. WALDSTEINIA Willd. Ko-kimbai Zoku 



Perennial herb with creeping rhizomes; leaves radical or mostly so, petioled, 3-foliolate, toothed, incised or serrate, the 

 stipules membranous; flowers solitary, scapose or few in corymbs; calyx persistent, the tube obconical, the segments 5; bracts 

 of caliculus 5; petals 5, yellow; stamens many; carpels 2-6, free, the ovules solitary; styles nearly terminal, deciduous; achenes 

 obliquely obovate. Few species, in the N. Hemisphere. 



1. Waldsteinia ternata (Steph.) Fritsch. Dalibarda 

 ternata Steph.; W. sibirica Tratt.; W. jragarioides sensu auct. 

 Japon., non Tratt. Ko-kimbai. Perennial herb with slen- 

 der elongate creeping rhizomes; leaves radical, 3-foliolate, the 

 leaflets slightly pilose on both sides, toothed, the terminal one 

 broadly rhombic-obovate, 2-3 cm. long, 1.5-2.5 cm. wide, 

 shallowly 3-lobed, the lateral ones oblique, the petioles 5-10 



cm. long, slightly spreading-pubescent or glabrate; scapes 10- 

 20 cm. long, nearly as long as the leaves, sometimes sparingly 

 spreading-pubescent, 1- to 3-flowered; flowers yellow, about 2 

 cm. across; calyx-segments broadly lanceolate, subacute; petals 



spreading; achenes 3-4 mm. long, white-pilose. May-June. 



Woods in mountains; Hokkaido, Honshu (centr. and n. 

 distr.). Sakhalin and Siberia. 



