(ne 



Umbelliferae 



1. Chamaele decumbens (Thunb.) Makino. Sium de- 

 cumbens Thunb.; C. tenera Miq.; Aegopodium tenerum 



(Miq.) Yabe Sent6-s6. Delicate, glabrous perennial with 



rather thick, short rhizomes; leaves radical and petiolate, the 

 petioles dilated and stipulelike in those at base, the blade ovate- 

 deltoid, 3-6 cm. long, 2 or 3 times ternately pinnate, the ulti- 

 mate segments membranous, ovate or deltoid, rather acute, 5- 

 10 mm. long, deeply lobed; peduncles 10-25 cm. long, the in- 

 volucre and involucel lacking, the rays 3-5, 3-5 cm. long, the 

 central one often very short, the umbellets 7- to 10-flowered, 

 the pedicels unequal, 1-5 mm. long, papillose on the inner 



side; flow^ers white, small; fruit 2.5-3.5 mm. long, the styles 



spreading-recurved, 0.5-1 mm. long. Apr.-May. Woods; 



Hokkaido, Honshu, Shikoku, Kyushu; rather common and 



variable in shape of the leaflets. Forma japonica (Yabe) 



Ohwi. C. japonica Makino ex Yabe in syn.; C. decumbens 

 var. japonica Makino; Aegopodium tenerum var. japonicum 



Yabe Miyama-sent6-s6. Ultimate segments slender, Un- 



ear. Forma dilatata Satake & Okuyama. Ibuki-sent6-s6. 



Leaves once or sometimes twice compound, larger, the ulti- 

 mate segments broader. 



17. SESELI L. 



Ibuki-b5fu Zoku 



Usually pilose perennials; stems often angled; leaves ternately pinnate or pinnately compound, the ultimate segments usually 

 narrow; umbels compound, the involucral bracts many or absent, the bracdets of the involucel numerous; flowers white; calyx- 

 teeth evident; petals rather broad, emarginate at the incurved apex; styles usually slender; stylopodium flat or convex, with un- 

 dulate teeth on the margin; fruit ovoid or oblong, short-pubescent, nearly orbicular in cross section, the carpels compressed 

 dorsally, the ribs equal or nearly so, radier prominent, obtuse, the vittae usually solitary in the intervals and rarely also under 

 the ribs, the carpophore bifid; seeds semi-orbicular in cross section, with a nearly flat face. About 10 species, in Eurasia. 



1. Seseli libanotis (L.) K. Koch var. japonica H. Boiss. 

 S. libanotis sensu auct. Japon., non K. Koch; S. libanotis subsp. 

 japonica (H. Boiss.) Hara; S. ugoensis Koidz.; Libanotis ugo- 

 ensis (Koidz.) Kitag.; S. libanotis subsp. japonica forma ugoen- 

 sis (Koidz.) Hara Ibuki-bofu. Pubescent perennial, 



the thick rhizome at the apex sparsely fibrous; stems 40- 

 80 cm. long, branched; radical and lower cauline leaves 

 petiolate, 2 or 3 times pinnately compound, ovate, the ultimate 

 segments ovate, deeply cleft, 2-3 cm. long, the lobes lanceo- 



late, finely ciliate, the upper leaves smaller, sessile, less divided; 

 umbels pedunculate, papillose-pilose on the peduncles at tip, 

 the rays more than 10, 2-3 cm. long, papillose-puberulent; in- 

 volucre absent, the involucel bractlets short, few, appressed to 

 the short pedicels; fruit ovoid, about 2 mm. long, papillose- 

 puberulent, the calyx-teeth elongate-deltoid, the styles about 1 



mm. long, the stylopodium convex. Aug.-Sept. Hokkaido, 



Honshu (Yamato Prov. and northw.). s. Kuriles. The typi- 

 cal phase occurs in Europe and w. Asia. 



18. CICUTA L. DoKuzERi Zoku 



Tall, glabrous perennials usually of wet places; leaves pinnate; umbels compound, many-rayed; bracts of the involucre few or 

 absent; involucel bractlets few, small; flowers white; calyx-teeth small, acute; petals rather broad, incurved and emarginate at 

 apex; stylopodium rather thick, flat, entire; fruit ovoid to depressed ovoid-globose, slightly compressed laterally, slightiy grooved 

 on the commissure, the carpels slightly flattened dorsally, suborbicular in cross section, the ribs thick, obtuse, broad, rather corky, 

 the pericarp membranous, the vittae solitary in the intervals, the carpophore bifid; seeds suborbicular or flattened dorsally in 

 cross section, convex on the face. ^Few species in wet places in the N. Hemisphere. 



1. Cicuta virosa L. C. nipponica Fr. & Sav.; C. virosa 

 var. nipponica (Fr. & Sav.) Makino; C. virosa var. tenuifolia 



Koch; C. virosa var. latisecta Koso-Pol. Dokuzeri. Large, 



glabrous perennial with thick, green, jointed rhizomes; stems 

 much branched, 60-100 cm. long; radical and lower cauline 

 leaves long-petiolate, deltoid-ovate in outline, 30-50 cm. long, 

 twice pinnately compound, the ultimate segments linear-lance- 

 olate to broadly lanceolate, 3-8 cm. long, 7-20 mm. wide, 

 acute, acutely dentate, the upper leaves subsessile, smaller and 



less divided; umbels glabrous, rather numerous, the involucral 

 bracts absent, the rays about 20, 3-7 cm. long, spreading, the 

 umbellets more than 10-flowered, the bractlets of the involucel 

 few, linear-filiform, 3-7 mm. long; pedicels slender, 8-10 mm. 

 long; fruit ovoid-globose, about 2.5 mm. long, green, with 

 thick yellow ribs, the calyx-teeth deltoid, minute, the styles 

 slender, about 1 mm. long. June-Aug. Wet places; Hok- 

 kaido, Honshu, Shikoku, Kyushu. Europe, Siberia, China, 



Manchuria, Korea, and perhaps Alaska. 



19. SIUM L. MuKAGo-NiNjiN Zoku 



Glabrous herbs of wet places, with thickened spongy roots; stems elongate, leafy; leaves usually simply pinnate, the leaflets 

 dentate; umbels compound, the bracts and bractlets numerous, usually prominent, green; calyx-teeth acute; petals emarginate 

 and incurved at apex, white; stylopodium thickened, depressed-conical, entire; fruit ovoid or oblong, flattened or laterally 

 grooved on each side on the commissure, the carpels nearly 5-angled in cross section, the ribs thick, obtuse, equal, often corky, 



the vittae numerous, the carpophore obscure, or undivided; seeds nearly orbicular in cross section, the seed-face plane. About 10 



species, in the N. Hemisphere and Africa. 



lA. Rays 5-10, rather stout; involucral bracts few, often deflexed; pedicels 10—15, rather stout, 3-6 mm. long; fruit ovoid-globose or ob- 

 ovoid. 



2A. Leaflets 7-11 (very rarely 5), the terminal distinctly petiolulate; axillary bulbils none; fruit obovoid 1.5. suave 



2B. Leaflets 3—5, the terminal sessile or short-petiolulate; axillary bulbils present; fruit ovoid-globose 2.5. sisarum 



IB. Rays 2-5, very slender; involucral bracts 1 or none; pedicels 2-7 (-10), very slender, 7-10 mm. long; leaflets 3-5, the terminal sessile 

 or nearly so; fruit ovoid 3.5. serra 



