514 



Saxifragaceae 



4A. Racemes about 10-flowered; branches slender; leaves less than 4 cm. long; flowers unisexual 3. R. maximowiczianum 



4B. Racemes more than 10-flowered; branches rather stout; leaves 5-10 cm. long; flowers bisexual. 

 5A. Leaves with yellow glandular dots beneath. 



6A. Flowers rotate; racemes 10-15 cm. long; calyx-limb very short; native shrub f. R. japonicum 



6B. Flowers tubular-campanulate; racemes 4-6 cm. long; calyx-limb tubular, as long as the lobes; cultivated exotic shrub. 



5. R. americantim 

 5B. Leaves not glandular-dotted beneath. 



7A. Fruit with long-glandular hairs 6. R. sachalinense 



7B. Fruit without glandular hairs. 



8A. Flowers short-campanulate; calyx-limb as long as the lobes 7. R. latijolium 



8B. Flowers rotate; calyx -limb very short. 



9A. Procumbent native shrub; anther-locules contiguous 8. R. tristc 



9B. Erect cultivated exotic shrub; anther-locules distant 9. R. sativum 



IB. Spiny or prickly shrubs; pedicels not jointed. 



lOA. Branches densely slender-spiny; leaves and petioles often with glandular spines; flowers 6-7 10. i?. horridum 



lOB. Branches with slender simple or stout ternate spines at the nodes; leaves unarmed; flowers 1-2. 



IIA. Fruit glabrous, red; petals broadly lanceolate, acute or raucronate, 3-4 mm. long; inner side of calyx-limb and lower portion of 



styles glabrous; native shrub 11. J?, sinanense 



IIB. Fruit short-pubescent and sometimes also glandular-pilose, green, yellowish, or reddish; petals cuneate-obovate, rounded, about 2 

 mm. long; inner side of calyx-limb and lower portion of styles hairy; cultivated exotic shrub 12. i?. grossularia 



1. Ribes ambiguum Maxim. R. burejense sensu Maxim., 

 pro parte, non F. Schmidt; R. cynosbati sensu Thunb., non L. 



Yashabishaku. Sparsely branched small epiphytic shrub 



with rather stout stems and branches; leaves orbicular, 3-5 cm. 

 in diameter, cordate, shallowly 3- to 5-lobulate, toothed, short- 

 pubescent, sometimes glabrescent above, the petioles 1-3 cm. 

 long, short-pubescent; flowers 1 or 2, the pedicels 5-10 mm. 

 long, with 2 small deciduous bracteoles near the top; ovary 

 with long brownish red glandular hairs; calyx-lobes oblong, 



the limb short; berry broadly ellipsoidal, 10-12 mm. long. 



Apr.-May. Epiphytic on tree-trunks and branches in moun- 

 tains; Honshu, Shikoku, Kyushu; rather rare. 



Var. glabrum Ohwi. Ke-nashi-yashabishaku. Leaves 



and petioles glabrous. Kyushu (Mount Gozendake in Chi- 



kugo Prov.). 



2. Ribes fasciculatum Sieb. & Zucc. R. japonicum 



Carr., non Maxim. ^Yabu-sanzashi. Erect dioecious shrub; 



leaves suborbicular, 3-4 cm. long, 3.5-5 cm. wide, truncate to 

 slightly cordate, sparsely short-pilose especially beneath, 3- to 

 5-lobed, the lobes obtuse or subobtuse, irregularly toothed, the 

 petioles 1-4 cm. long; flowers few, in axillary fascicles, the 

 staminate cup-shaped, the pistillate ovoid, the pedicels short, 

 bractless; calyx-limb extremely short, the lobes elliptic, re- 

 curved; petals minute; berry broadly ellipsoidal, red, 8-10 



mm. long. Mar.-Apr. Honshu (centr. distr. and westw.), 



Shikoku, Kyushu; rare. Korea and China. 



3. Ribes maximowiczianum Komar. R. maximowiczii 

 Komar., non Batal.; R. maximowiczianum var. umbrosum. 

 Komar.; R. tricuspe Nakai; R. alpinum var. mandshuricum 

 Maxim.; R. alpinum var. japonicum Maxim.; R. distans Jancz.; 

 R. maximowiczianum var. mandshuricum (Maxim.) C. K. 

 Schn.; R. maximowiczianum. var. japonicum (Maxim.) C. K. 



Schn.; R. distans var. japonicum (Maxim.) Jancz. Zari- 



GOMi. Dioecious shrub with slender gray-brown branches; 

 leaves deltoid-orbicular, 2-4 cm. in diameter or slightly nar- 

 rower than broad, thinly pilose on both sides or nearly gla- 

 brous, often with a tuft of axillary hairs beneath, 3-lobed, the 

 lobes acute to subacuminate, coarsely toothed, the lateral lobes 

 often smaller and sometimes again 2-lobed, the petioles 7-10 

 mm. long; staminate inflorescence 7- to 10-flowered, the pistil- 

 late 2- to 6-flowered, 1-2.5 cm. long, the bracts lanceolate, 3-4 

 mm. long; flowers rotate, yellowish, 4-5 mm. across; calyx- 

 limb extremely short, the lobes elliptic, glabrous; pedicels of 

 the pistillate flowers about 1 mm. long, of the staminate 3-4 



mm. long; fruit red, glabrous, ellipsoidal, about 7 mm. long. 

 May-June. Honshu (centr. distr.). Korea and Man- 

 churia. 



4. Ribes japonicum Maxim. Komagatake-suguri. 

 Erect, spreading-puberulent shrub with rather stout branches; 

 leaves membranous, orbicular, 7-15 cm. in diameter, 5-cleft, 

 cordate, puberulent to nearly glabrous above, prominendy 

 puberulent and with sessile yellow-brown glandular dots be- 

 neath, the lobes short-acuminate, doubly toothed, the petioles 

 10-15 cm. long; racemes many-flowered, 10-15 cm. long, the 

 pedicels 3-7 mm. long, the bracts linear, shorter than the pedi- 

 cel; flowers rotate, 8-10 mm. across, yellow-green; calyx-limb 

 short, the lobes broadly ovate, slightly recurved; petals small, 

 obtriangulate; berry black, broadly ellipsoidal, 6-7 mm. long. 



May-July. Woods in mountains; Hokkaido, Honshu, 



Shikoku. 



5. Ribes americanum Mill. R. floridum L'Herit. 



Amerika-kuro-suguri. Resembles the preceding; leaves 

 smaller, 3-8 cm. long and as wide, truncate or sometimes 

 cordate, not prominently puberulous; racemes 4-6 cm. long; 

 flowers more than 10, yellowish, campanula te, the bracts 

 longer than the pedicels; ovary glabrous; calyx-limb nearly as 

 long as the lobes; petals and stamens not exserted; berry gla- 

 brous, black. May. A shrub of e. N. America rarely 



planted in our area. 



6. Ribes sachalinense (F. Schmidt.) Nakai. R. affine 

 var. sachalinense F. Schmidt; R. laxiflorum var. japonicum 



Jancz.; R. laxiflorum sensu auct. Japon., non Pursh Toga- 



suGURi. Procumbent sparingly branched shrub, the branches 

 rather stout, puberulent while young; leaves membranous, 

 orbicular, 4-10 cm. in diameter, deeply 5-cle£t, loosely glandu- 

 lar-hairy on the nerves beneath; inflorescence 5-10 cm. long, 

 loosely 7- to 10-flowered, short-glandular, the bracts linear, 

 very much shorter than the pedicels; flowers rotate, 5-6 mm. 

 across, yellow-green; ovary densely glandular-pubescent; calyx- 

 limb extremely short, the lobes obovate-rounded, glabrous; 

 berry glandular-hairy, broadly ellipsoidal, about 8 mm. long, 



dark red.- June-July. Hokkaido, Honshu (centr. distr.), 



Shikoku. Sakhalin. 



7. Ribes latifolium Jancz. R. petraeum var. tomento- 



sum Maxim., pro parte Ezo-suguri. Erect shrub, the 



young branchlets puberulent and often glandular-hairy; leaves 

 orbicular, 5-10 cm. in diameter, or slighdy broader than long, 

 rather densely white-hairy to glabrous on upper side, cordate, 



