ROSACEAE 



525 



20A. Leaflets of radical leaves 15-27, pinnately parted nearly to the midrib, the lobes lanceolate, with accessory leaflets on 

 primary axis; calyx-segments short-pilose and soft-pubcsccnt, green, not white-woolly; bracts of caliculus much 



narrower than the calyx-scgmcnts; achcncs rugose 18. P. chincnsis 



20B. Leaflets of radical leaves 7-13, pinnately lobed to cleft, the lobes narrowly ovate, without small accessory leaflets; 

 calyx-segments with white woolly tomentum; bracts of caliculus similar to the calyx-segments in size and shape; 



achenes smooth 19. P. nipponica 



2B. Shrub; flowers yellow or white 20. P. jrtiticosa 



IB. Receptacles slightly accrescent after anthesis; petals dark reddish purple, shorter than the calyx-segments; plants of bogs and around 

 ponds 2 1 . P. pahistris 



1. Potentilla egedei Wormsk. van groenlandica 



(Tratt.) Polunin. P. pacifica Howell; P. anscrina sensu auct. 

 Japon., non L.; P. anscrina var. orientalis Card.; P. anserina 



var. groenlandica Tratt. Ezo-tsuru-kimbai. Perennial 



herb with elongate slender stolons; radical leaves 10-40 cm. 

 long; stipules scarious, adnate to the base of the petioles, the 

 rachis widi short accessory leaflets, the ordinary leaflets 13-19, 

 oblong or narrowly so, coarsely toothed, 2-5 cm. long, 7-20 

 mm. wide, glabrous to long-pilose on upper side, with white- 

 woolly hairs beneath, and long silky hairs on the nerves; 

 leaves on the stolons very small; flowers 20-30 mm. across, 

 pedicellate, solitary, axillary on stolons; calyx-segments ovate- 

 deltoid, 4-6 mm. long, acute; bracts of caliculus entire, broadly 

 lanceolate, slightly smaller than the calyx-segments; petals 

 broadly obovate; anthers elliptic; styles about 2 mm. long; 

 achenes smooth, rounded on back. — —June-July. Wet saline 



places near the sea; Hokkaido, Honshu (n. distr.). Korea, 



Ochotsk Sea region, Kuriles, Sakhalin, Kamchatka, and N. 

 America. 



2. Potentilla kleiniana Wight & Arn. P. reptans A. 



Gray; Duchesnea sundaica Miq.; ? P. savatieri Card. 



O-HEBi-icHiGo. Perennial herb with short rhizomes densely 

 leafy at apex; stems 20-40 cm. long, erect, ascending above, 

 few-leaved and branched, slightly ascending-pubescent; radical 

 leaves long-perioled; stipules tightly adnate to the petiole, the 

 free portion narrowly deltoid, acute, the cauline leaves with 

 the stipules shortly adnate, the free portion ovate, often den- 

 tate, the leaflets 5 (or 1-3 on the upper cauline leaves), 

 digitate, narrowly ovate to broadly oblanceolate, 1.5-5 cm. 

 long, 8-20 mm. wide, obtuse, nearly glabrous above, paler and 

 with appressed-pilose nerves beneath; inflorescence rather 

 many-flowered, the pedicels 5-20 mm. long, with white as- 

 cending-pilose hairs; flowers about 8 mm. across; calyx-seg- 

 ments ovate, subacute; bracts of caliculus narrower; stamens 

 broadly ovate; receptacle short-pilose at base; achenes broadly 

 ovoid, 0.6 mm. long, slightly longitudinally rugose; styles 



short, nearly as long as the achenes. May-June. Honshu, 



Shikoku, Kyushu; rather common, Korea, China, India, 



and Malaysia. 



3. Potentilla centigrana Maxim. P. ccntigrana var. 

 japonica Maxim.; P. centigrana var. mandshurica Maxim.; P. 

 reptans var. trijoliata A. Gray; P. rostilijera Lev.; P. longcpcti- 



olata Lev. Hime-hebi-ichico. Rather slender perennial 



herb; stems decumbent, later much elongate, very slender, 

 branching and creeping, many-leaved, slightly spreading- 

 pilose; stipules lanceolate to ovate, subacute; leaflets 3, thin, 

 subsessile, obovate, elliptic or obovate-orbicular, 1-3 cm. long, 

 8-20 mm. wide, obtuse to rounded, nearly glabrous above, 

 slightly glaucous and thinly appressed-pilose on nerves be- 

 neath; flowers appearing terminal, but soon axillary, solitary 

 or in a terminal corymb in the upper ones, the pedicels slen- 

 der, 1-4 cm. long; calyx-segments narrowly ovate, acute. 



nearly as long as the bracts of the caliculus; petals about 3 

 mm. long, yellow; anthers elliptic; achenes broadly ovate, gla- 

 brous, with few irregular longitudinal lines; styles linear, 



about 0.7 mm. long. Apr.-Aug. Wooded mountains; 



Hokkaido, Honshu, Shikoku, Kyushu. Korea, n. China, 



and Ussuri. 



4. Potentilla dickinsii Fr. & Sav. P. ancistrifolia var. 

 dicl{insii (Fr. & Sav.) Koidz.; P. ancistrifolia sensu auct. Ja- 

 pon., non Bunge Iwa-kimbai. Short-pubescent perennial 



herb with stout short woody branching rhizomes; stems 10-20 

 cm. long, erect; radical leaves petioled; stipules lanceolate, 

 acuminate; leaflets 3-5, subcoriaceous, the upper 3 larger, 

 rhombic-ovate or elliptic, 2.5-5 cm. long, 1.5-3 cm. wide, 

 acute or sometimes obtuse, with coarse acute deltoid teeth, 

 green above, glaucous beneath; inflorescence few- to rather 

 many-flowered; flowers about 1 cm. across, yellow; calyx-seg- 

 ments narrowly ovate, acuminate; bracts of caliculus lanceo- 

 late; anthers broadly ovate; receptacle with dense white hairs 

 about 2 mm. long; achenes ovoid, brown, smooth, with few 

 long curled hairs longer than the body; styles filiform, about 



1.5 mm. long. June-Aug. Rocks in mountains; Hokkaido, 



Honshu, Shikoku, Kyushu. 



5. Potentilla miyabei Makino. Meakan-kimbai. Per- 

 ennial herb with yellowish brown appressed strigose hairs; 

 rhizomes creeping, short, branching, slightly woody; stems 

 3-10 cm. long, few-leaved, erect; leaves 3-5 cm. long; free 

 segments of the stipules lanceolate, gradually acute; leaflets 3, 

 subcoriaceous, broadly cuneate, 5-12 mm. long, 4-10 mm. 

 wide, truncate and with 3 coarse teeth at apex, grayish green; 

 flowers 1-5, about 15 mm. across; calyx-segments lanceolate, 

 acute; bracts of caliculus similar to the calyx-segments but 

 smaller; petals 5, 1.5 times as long as the calyx-segments, obo- 

 vate-orbicular; receptacle with dense strigose hairs about 4 

 mm. long; achenes ovoid, brown, about 1.5 mm. long, smooth, 

 with straight hairs about 4 mm. long at the ba,se and with 

 minutely appressed hairs on the upper portion; styles filiform, 

 3-3.5 mm. long. July-Aug. Gravelly to sandy slopes, al- 

 pine; Hokkaido; rare. 



6. Potentilla nivea L. P. macrantha Ledeb.; P. matsu- 



okana Makino Urajiro-kimbai. Perennial herb with 



stout short-creeping and branching rhizomes; stems 10-20 cm. 

 long, 1- or 2-leaved; radical and cauline leaves beneatii and 

 the petioles with densely woolly white tomentum; stipules 

 scarious, reddish brown, the free segments broadly lanceolate, 

 acute, green and sometimes dentate in the cauline ones; leaf- 

 lets 3, obovate-oblong to broadly ovate, 15-25 mm. long, 10-17 

 mm. wide, obtuse, slightly silky-pubescent and green above, 

 with ovate marginal teeth; flowers 1-5, 1.5-2 cm. across; 

 calyx-segments broadly lanceolate, acute; bracts of caliculus 

 narrowly lanceolate or broadly linear; petals about 1.5 times 

 as long as die calyx-segments, obovate-orbicular; receptacles 

 short-pilose; achenes ovoid, about 1.5 mm. long, smooth, gla- 



