ROSACEAE 



529 



11. SIBBALDIA L. 



Tateyama-kimbai Zoku 



Dwarf suffrutescent shrubs or herbs with creeping branched rhizomes; leaves radical and closely alternate, usually 3-foliolate, 

 the stipules adnatc to the petiole; inflorescence a scapose cyme; calyx persistent, the tube short, the segments 5, as many as and 

 alternate with the bracts of the caliculus; petals 5, smaller than the calyx-segments, usually narrowly obovate, commonly yellow, 

 rarely purplish; stamens 5; disc hairy; carpels 5-10, with a short hairy stipe at base; style ventral; ovules solitary; achenes 5-10, 

 glabrous. About 10 species, in northern and alpine regions in the N. Hemisphere. 



1. Sibbaldia procumbens L. Potentilla procumbens mm. wide; inflorescence rather densely about 10-flowered, the 



(L.) Clairv.; P. sibbaldii Haller f. Tateyama-kimbai. 



Dwarf suffrutescent herb with short creeping branches densely 

 covered with stipules and 2-6 cm. long persistent bases of the 

 old petioles; leaflets 3, nearly similar, cuneate, truncate and 

 with 3(-5) large teeth at apex, usually 1-1.5 cm. long, 6-10 



pedicels very short; calyx-segments narrowly ovate, 3.5-5 mm. 

 long, acute; petals narrowly obovate; achenes ovoid, small, 



nearly smooth. July-Aug. Dry alpine slopes; Honshu 



(centr. distr.); rare. n. Korea, Sakhalin, n. Kuriles to 



Europe and N, America. 



12. DRYAS L. 



Ch6nosuke-s6 Zoku 



Dwarf shrubs with short, densely tufted or short-creeping branches; leaves evergreen, simple, petioled, elliptic to ovate, entire 

 or pinnately lobulate, the stipules adnate to the petioles; pedicels erect, solitary, radical; flowers white, sometimes yellow, large; 

 calyx persistent, cup-shaped or campanulate, not caliculate at base, the segments 8 or 9; petals 8 or 9, obovate; stamens many; 

 carpels many; styles terminal, persistent and elongate after flowering, plumose in fruit; ovules solitary; achenes many, usually 

 pubescent. Few species, in alpine regions in the N. Hemisphere. 



1. Dryas octopetala L. var. asiatica (Nakai) Nakai. 

 D. octopetala sensu auct. Japon., non L.; D. octopetala forma 



asiatica Nakai; D. tschonoskji Juzep.; D. nervosa Juzep. 



Ch6nosuke-s6. Decumbent, much-branched dwarf shrub; 

 leaves subcoriaceous, ovate to broadly ovate-elliptic, 10-20 mm. 

 long, 6-15 mm. wide, obtuse, shallowly and obtusely lobulate 

 and slightly recurved on margin, green above with impressed 

 midrib and nerves, densely white-tomentose beneath, the peti- 



ole 5-20 mm. long, white-pubescent; pedicels 3-10 cm. long, 

 white-woolly; petals 10-15 mm. long, rounded at apex; achenes 

 about 3 mm. long, pubescent; styles elongate, about 3 cm. 



long, plumose with white hairs. Juiy-Aug. Dry alpine 



slopes; Hokkaido, Honshu (centr. distr.); rare. Kam- 

 chatka, Kuriles, Sakhalin, Ussuri, Ajan, and n. Korea. The 

 tj'pical phase occurs in the cold regions of the N. Hemisphere. 



13. GEUM L. Daikon-s6 Zoku 



Perennial herbs or dwarf shrubs; leaves radical and often cauline, alternate, pinnate or pinnately parted, the leaflets all alike 

 or the terminal larger, sometimes only a terminal one; stipules green, rather large or linear and small, more or less adnate on the 

 petiole; flowers solitary or in corymbs, yellow or white, sometimes reddish purple; calyx with a short obconical tube, the seg- 

 ments persistent, alternate with the bracts of the caliculus; petals 5; stamens many, free; carpels many, on a slighdy enlarged 

 glabrous or hairy receptacle; styles terminal, filiform, sometimes jointed, persistent, sometimes deciduous only above the joint, 



sometimes pinnately hairy. About 50 species, in the temperate to cold regions of the N. Hemisphere, a few in S. America 



and Africa. 



lA. Procumbent dwarf glabrous evergreen shrub; leaves with nearly equal leaflets; flowers white, rather large; styles pinnate and elongate 



in fruit \. G. pentapelaltim 



IB. Erect coarsely pilose perennial herbs; leaves with the terminal leaflet much larger than the lateral; flowers yellow; styles only slightly 

 elongate after anthesis and not pinnate. 

 2A. Styles jointed, the upper portion deciduous after flowering. 



3A. Receptacle with yellowish brown bristly hairs 2-3 mm. long; pedicels velvety pubcrulcnt 2. C. japoiiicum 



3B. Receptacle with very short whitish hairs less than 1 mm. long. 



4A. Plant hispid-hirsute; lateral leaflets of the radical leaves 2 to 5 pairs; styles without stipitate glands i. G. alcppicum 



4B. Plant setose with bristly hairs; lateral leaflets of the radical leaves very small, 1 or 2 pairs; styles with sparse stipitate glands 



at base 4. G. macrophytltim var. sachalinensc 



2B. Styles not jointed, persistent; leaves with a large orbicular-cordate terminal leaflet and very small or obsolete lateral leaflets. 



5. G. callhaejolium var. nipponicum 



1. Geum pentapetalum (L.) Makino. Dryas penta- with a 3- to 5-parted leaf, densely puberulent above; flowers 



petala L.; Sicversia pentapetala (L.) Greene; G. anemonoides solitary, white, 2-3 cm. across; calyx-segments broadly lanceo- 



Willd.; S. dryadioides Sieb. & Zucc; G. dryadioides (Sieb. & late, long-acute, slightly recurved after flowering, the bracts 



Zucc.) Fr. & Sav. Chinguruma, Iwagurum/\. Dwarf of the caliculus short, lanceolate; petals orbicular; achenes 



evergreen glabrous shrub with prostrate slender much-divided rather many, about 2 mm. long, fusiform, with white ascend- 



branches, about 5 mm. thick at base; leaves petioled, i-6 cm. ing hairs; styles elongate after anthesis, filiform, about 3 cm. 



long, die leaflets 7-9, subcoriaceous, broadly oblanceolate to long, long white spreading-plumose. Junc-Aug. Wet 



obovate, 6-15 mm. long, 4-8 mm. wide, acute, with irregular slopes and somedmes sphagnum bogs in high mountains; 



incisions, sometimes subtrilobed, lustrous and deep green Hokkaido, Honshu (n. and centr. distr.). Kuriles, Sak- 



above, the stipules linear; scapes about 10-20 cm. long, erect, halin, Kamchatka, and Aleutians. 



